Toyota 22r Valve Clearance Cold

decreasing clearance. Cold engine starts and idles and runs fine for any distance. Here is a list of some of the well known Ford 5. 25 hopefully this is the metric measurement? and e quals 8 and 10 thous [i hope I 'm not being pedant] which are std settings if you are setting them at 20 and 25 thou its no wonder they rattle , set them cold , overnight not run and they should be fine ,performance cams tend to be noisier than. Toyota throttle bodies contain the throttle valve. (22R-E ENGINE) ADJUST VALVE CLEARANCE (a) Warm up the engine to normal operating temperature. Shop for air intake kits, including standard, ram air, cold air, sealed, non-sealed and other designs for carbureted and EFI applications at Summit Racing!. you can check them cold if you want to get a feel for it, but I wouldn't adjust them cold. 3 hours commercial. 016 inch for exhaust. Loosen the lock nut and turn the adjusting screw to set the proper clearance. Valve-to-piston collision and a ruined engine can result. 007" (i) and. 93 Toyota pick-up 22RE wont start. ) lifter is installed, and the measured. He said its my cold start valve and that alot of 22re engines have this problem. Is there anything that would make just the signal in 3 to go out?. " Scott Shafrioff reminded, "Cylinders heat up at different rates but cold is cold. To set the timing on a Toyota 22R. Check that rocker arms for No. i like loose clearances so i think you will be good at. The 4G63 motor is one of the Mitsubishi Sirius 4G6 range. 38 ± 3 Nm (28 ± 2 ft-lb) 11 Turn the engine to the next camshaft marking before adjusting another cylinder. What you're doing when you're setting your clearances is compensating for the change in gap from about 80* cold to around 400* of the engine operating temperature. Kawasaki small engine intake and exhaust valve clearances used on a variety of outdoor power equipment applications. If all you need to adjust is the exhaust valves your in luck, you don’t need to remove the cam or cam caps, you will need to remove the cam cap bolts but that’s way easy. they are installed with a VERY thick valve spring retainer which increases spring pressure AND the valve seat is very tall which also increases spring seat pressure. com and has not been tested at DIYAutoTune. A lot of this data was collated from discussions on the Classic-Celica group. Don't over think this, there is more than enough clearance variation to accommodate any expansion/contraction of the materials do to weather. Cold Engine Enrichment. Many Jeep owners need how-to information on checking valve clearances and adjusting the hydraulic valve lifters on the inline 232, 258 and 4. Any one who can build with legos can do it. Kent Valve clearance Club Level Single Seaters. The 22R was first available in 1981 with the 22RE becoming available in 1983. Curious if someone could point me into the right direction. Two questions 1 Should this be done while the engine is hot or cold? Does it matter? Bentleys shop manual says it should be done while engine is cold, BUT a local british specialty shop mechanic told me "this makes no sence since these angines dont run cold" and he always does it with the engine hot. They look the same and fit nicely. There was a change in piston in the later engines that made the difference. A valve clearance adjustment on an XK engine is time consuming and hard on your back, since you must remove the camshafts each time you change shims, and it sometimes takes several attempts to arrive at the best settings. toyota 22re vacuum diagram toyota 22re valve clearance adjustment toyota 22re valve train noise toyota 22re water pump toyota 22re wrist pin toyota 22rec egr toyota 22rec engine parts toyota 22rec motor toyota 22rec performance parts toyota 22-ret toyota 22ret performance toyota 22-ret pick ups toyota 22-ret pickups toyota 22rte engine assembly. not sure for cold motor. You'll notice one or more of the following symptoms. Some are some arn't. 002 to the exhaust setting over what the specs called for. Proper clearance gives the exhaust valve the most time to sit on its seat and dissipate heat. Toyota 4Runner 1996-2002: How to Replace Valve Cover Gaskets. Then, turn the engine over again, keeping your eye on the intake valve of the same cylinder. * Check EGR system. these are the tiny bolts that hold the cold start injector fuel line to the fuel rail and the injector. * Check idle air control valve (if equipped) and wiring. 011" hot so for cold minus. Mine were noisier on the strict 'rule of nine points'. valve clearance. My phone a friend says. ENGINE MECHANICAL - VALVE CLEARANCE 2000 CELICA (RM744U) VALVE CLEARANCE ADJUSTMENT HINT: Inspect and adjust the valve clearance when the engine is cold. The exhaust valves should have. I checked the spark and its there but when I checked for the signal for the injector no voltage. I had noticed a tapping noise in the motor for some time that has gotten progressively worse. Used OEM Toyota Cold Start Injector Valve 2326035020 , All Parts QC Inspected , One Year Warranty , Free Ground Shipping , For More Info Call 310 835 3100 1884-88 Toyota Pickup 22RE Cold Start Valve Click Here. The 4G63 motor is one of the Mitsubishi Sirius 4G6 range. CM-202 welcomes you to the world of valve interference and how to fix that problem by adding eyebrows to the top of the engine block. Forced circulation with pump, full flow oil filter and oil cooler n 5000 rpm, up to approx. Some of these older 22RE engines would wear the rocker arms and it would cause the valve to not be centered with the pin on the rocker arm that pushes it down to open. these engines make noise, it means they are happy. On 22r/re, a little noise is acceptable and a good sign, no noise and the possibility of valve damage may occur ( burnt exhaust valves) or hammered seats. Some are some arn't. How much resistance is correct? A good method to use is the "go/no go" method. Many Jeep owners need how-to information on checking valve clearances and adjusting the hydraulic valve lifters on the inline 232, 258 and 4. 05mm increments. If the valve doesn't close all the way it will burn the valve and the seat. the use of non e-z-go parts and hardware may void the warranty. The dealer recommends a valve clearance adjustment at this time. With the piston at TDC, slide the feeler gauge between the valve and the rocker arm. Adjustment of the valve clearance is done by means of an outer shim type system, in which valve adjusting shims are located above the valve lifters. NOTE Check and adjust valve clearance with engine cold must be disconnected for access to valve covers. Using suitable dial indicator positioned at front of cylinder head, measure camshaft thrust clearance, Fig. However, that’s just my two cents. your cold air valve is still good and you need to adjust. 2mm for intake and. 004" over spec on all four valves. With all 4 valves adjusted, replace the valve and timing covers, making sure that the o-rings are not torn. Toyota RAV4 Valve Clearance Adjustment costs between $176 and $411 on average. 2012 Valve clearance adjustment Toyota Hilux Surf 22re Pickup rocker lifter check top dead center lash crankshaft pulley intake exhaust feeler … 22Re valve adjustment Cold or Hot? - Car … When adjusting valves on a 1986 22RE Toyota 22Re valve adjustment. The cold valve lash settings that I remember from the time I worked on JD were. To avoid damage, DO NOT OPERATE VALVE until you have followed these instructions: 1. 590 solid lifter cam in my 440 for a while. because the expansion of the valves when subjected to high temperatures depends upon various factors, such as heat efficiency of the charged air, type of fuel used, etc. I set my valve clearance hot or cold, never had a problem. 257cc linhai/clone valve adjustment. Aluminum cylinder head to expand at different rates but was just. Cold Start Injector Delete Kit EFI ONLY Fits 1983-95 Toyota 22RE EFI Only. If any of you think you can predict how the various components of an engine will grow, or not, at operating temp, well that's one up on me. Mercedes Diesel Valve Adjustment Procedure. Personally I prefer to do the adjustment with the engine cold, with the metal cold, the valves have not expanded due to heat and this, I believe will yield a truer clearance reading. This permits replacement of the shims without removal of the camshafts. MowerPartsZone. Some are some arn't. ” Shafrioff told us to set the valve lash with a cold engine and check the valve lash weekly with the engine at ambient air temperature. REMOVE CYLINDER HEAD COVER (See page EM-13) 2. He told me that the valve would get weak over time and start to leak constantly because even when you shut the engine off you still have 40psi of fuel pressure in the lines. By admin, on September 25th, 2011 Toyota 22R and 22R-E engine factory workshop and repair manual. It should be close to 0. 37:1 (not the design 1. This will cover what the throttle body does, how the TPS works, and how it can be inspected and adjusted. Running 5w-30 Castrol conventional. 94 Toyota 22RE engine. Many Jeep owners need how-to information on checking valve clearances and adjusting the hydraulic valve lifters on the inline 232, 258 and 4. As a general rule, it could be observed that a specific body type of a vehicle has some standard for ground clearance. 99 8% coupon applied. will shrink due to thermal contraction thus causing a clearance to open up. Is there anything that would make just the signal in 3 to go out?. (EFI) I have no Idea on how to do this so plz go in depth. ☀ Compare Price Valves ☀ Hot/Cold Mixing Valve Upgrade Kit by Brondell Free Shipping On All Orders Over $49. then after the retorque you readjust the valves to factory spec of. If you think the valve are tight, then check them. Engine Toyota 22R-E Service Manual (625. These are new parts that have just been in stock too long, and are overstocked due to over runs, cancelled orders, etc. * Check EGR system. I read several reviews that stated this tool was poor quality and difficult to use. Subtract read­ ing of valve stem diameter from valve guide bore port. I have a 1993 Toyota 4×4 pick up with the 22re motor. Valve lash is adjustable. There are a several methods for a valve adjustment on a chevy small block engine. Anyway, I have never found out (definitively) whether the 01 V6 has piston-valve clearance or am I risking smush. If you're looking for something more extreme check out our Stage 1, 2 and 3. with supplies of 15°C cold, 65°C hot and nominally equal pressures). We went through this exercise with the GF's Sherpa. Cam design never changed from the early 20R to the present. The cam closing is a mirror image. Valve clearance should be inspected on a cold engine. VALVE CLEARANCE EYEBROWS -- CM-202 Page 1 of 4. Although I haven't heard exhaust valve burning as an issue with the 22s, the top of the valve transfers a lot of it's heat from the face to the head when it sits on the seat (seat time), so it needs some time on there. 006 FC400V. these are the tiny bolts that hold the cold start injector fuel line to the fuel rail and the injector. 030" Oversize Per Car Qty: 1 Buyers Guide Make Model Engine Year(s) Toyota 4Runner 1984 - 1984 Toyota Celica 1981 - 1984 Toyota Corona 1981 - 1982 Toyota Pickup 2. 5813 NE Landerholm Rd La Center, WA 98629 Phone: (360) 747-7402 Located in La Center, Washington just off of I-5 30min North of Portland OR. They will be used later to determine the required replacement valve lifter. 006" (worn). Valve lash is defined as the mechanical clearance between the tip of the rocker arm and the valve stem tip. This results in additional valvetrain clearance. The check valve lets air into the bellows then the throttle opens and extends the plunger. problem is it burns the crap out of you doing it hot. on a 22r the adjustment usually doesn't change much between cold and hot. The engine is supposed to be cold when you adjust the valves, so it was good that you did not warm it up first. All intake would not take smallest feeler gauge. This will give you the best indication of when the lash is changing in one of the cylinders. What is the valve clearance on a 22r 1991 Toyota engine?. If you guys remember, it had a real clacky valve train. Wouldn't be all that worried if something broke as the engine's hanging on a thread already haha. 93 Toyota pick-up 22RE wont start. This is to help me determine if you are a member or if you are a spammer. you'll also see the valve lash clearance specs if the valves in your. 8 cm) clearance between any object and the rear and sides of the water heater in the event service is needed. The measured value of valve clearance should meet the specified value. See your John Deere Dealer. 22R Camshaft Install and Valve Adjustment. The adjustment didn't really help too much. 011 inch for intake; 0. 1) Check/adjust valve clearance with engine at normal operating temperature (cold on Tercel Wagon). VALVE CLEARANCE EYEBROWS -- CM-202 Page 1 of 4. The cause is often excessive valve clearance or a defective hydraulic valve lifter. Here is a list of some of the well known Ford 5. Understanding the Noise Valvetrain mechanism noise is similar to a clicking sound of a sewing. then once you start the tractor and run it up to operating temp. Changing the valve cover gaskets on your V6 engine is a challenging job. Exhaust valves get hotter than inlet valves so usually require more clearance. Cold clearance at valve stem tip. Method for Proper Valve Clearance Adjustment E-Z-GO Gas Golf Car with 295cc Twin-Cylinder OHC Engine WARNING: Always wear ANSI approved safety glasses when using power or hand tools and when adjusting valve settings. The importance of correct Honda valve clearances can't be over-stressed, as it can directly effect the performance and life of the engine. Up To 70% Off Everything Home! 2-Day Shipping. 25 hopefully this is the metric measurement? and e quals 8 and 10 thous [i hope I 'm not being pedant] which are std settings if you are setting them at 20 and 25 thou its no wonder they rattle , set them cold , overnight not run and they should be fine ,performance cams tend to be noisier than. If you don’t want to read the code skip to the bottom for a summary. Toyota 22RE 22R Performance Valve Springs - TPVSS7995. 006" for the intake and. The symptom you’re likely to notice the most when you have a burnt exhaust valve is a loss of power from the engine and an increase of fuel consumption as the engine is run harder to do the work expected of it. With valve clearances set, as you would normally expect for a standard engine at 0. Adjusting valve clearances is a Land Rover servicing task for every 12000 miles. not sure for cold motor. The original Toyota 22R engine was designed for use on pickup trucks. Maximum capacity and performance come from outstanding components and accessories. Does any one have the specs for valve clearance. Anyone got the COLD specs? Can you adjust them cold and that be it? Or is that just a pipe dream? Anyone had any good/ bad experiences doing this? Yes I know what the book says and that it also says warm or hot. (This is important) The specs for intake valves are 0. How to Adjust the Valves on a Motorcycle or ATV Engine September 13, 2012 April 23, 2013 GearHead 2 Comments Valves and springs on a Kawasaki Teryx with rocker arms and valve covers removed. In this video guide, we'll show you how to maintain your shower valve, with step-by-step instructions for both concealed and exposed (bar) valves. Low Range Off Road is your source for all Engine Upgrade parts for 22R, 22RE, and 3VZFE Toyota Engines. 012-in, the engine idles very roughly. Therefore, the amount of valve lash you use affects the engine's performance. Reducing this clearance will result in burned valves and seats as you say. 011 inch for intake; 0. He said its my cold start valve and that alot of 22re engines have this problem. Always set the valve clearance when an engine is cold. Corrected by Service Bulletin: Album click to view. The truck itself has over 400,000 miles on it the rebuilt engine somewhere in the area of 100,000+. 1 cylinder are loose and those for No. 017 feeler blades. Shop the lowest prices for Toyota engines, rebuild kits, and top quality OEM & performance parts. What am I forgetting? What else is there on later 22RE and/or California blocks? Throttle position sensor (TPS) (side of throttle body) 4Crawler. Posted by Lawrence Birchad on 29th Sep 2014. Just wondering what kind of spec they should be set to for an RV cam? Instructions from the builder said to do them. If it is a reground to stock specs cam, use the stock clearance numbers. When it comes to your Toyota Pickup, you want parts and products from only trusted brands. I am unable to get any play in the #4 exhaust valve to set the clearance. 1 and 2 intake valves and the Nos. I can't find anything for the cold setting. Essential tools required in performing certain service work are identified in this manual and are recommended for use. ENGINE DIFFICULT TO START UNDER COLD CONDITIONS * Ensure fuel system performs properly (fuel pump, fuel filter,. The valve clearance specification is different for intake and exhaust valve. The following components are upgraded from the standard 22R & 22RE engine. How to adjust valves on a chevy smallblock. A cold engine is a lot more comfortable to work on. This is everything I know from my own experience with '86 and '85 blocks, Fed/Canada emissions. cold valve settings for Toyota 22R 4 cyl Post by mtkawboy » Thu Apr 08, 2010 10:33 pm 22R motor calls for. Mechanics' Corner: More Technical Detail. The spec for the valve clearance on my engine is. Valve clearance for inspection [Engine cold] IN: 0. What Problems Does a Bad EGR Valve Cause? Idling and stalling problems can really add stress to your daily commute. So, set the valve lash when hot then let it cool, check the lash and record results. Improper valve clearance. However, when it comes time to change things it can get expensive. Set Valve Clearances Hot Or Cold? - posted in Problems, Questions and Technical: surely its cold? to allow for expansion? i mooched around the forums, and actually found one that said do them hot so thats why im asking. 019" clearance, while running and warm Just wondering how many of you guys do it this way versus cold (static) adjustment while not running? The subject is my '56 T-bird, 312 c. 2mm) I made sure that I was at TDC on the compression stroke & the engine was cold. To set the timing on a Toyota 22R. Keith Black High Compression Longblock 1985-1995 22R-22RE. Diesel Smoke tells YOU a Story. Adjusting valve clearances is a Land Rover servicing task for every 12000 miles. The original Toyota 22R engine was designed for use on pickup trucks. Both of these complaints are generally caused by a problem with cold start enrichment. Then, turn the engine over again, keeping your eye on the intake valve of the same cylinder. This clearance is also called valve lash. the book says with engine hot but i'm not able to do that since this engine is being built!!!! it is a de motor and i had a valve job done so my shims are all out of tolerance and as most of you know these have to be orderd and they aren't cheap. Loading Close. Last Updated on Tue, 01 Oct 2019 | Toyota Hilux 1KZ TE (a) Remove the adjusting shim. 93 Toyota pick-up 22RE wont start. It's also a good idea to test the 'stat ahead of time even if it's new. ) Exhaust 0. Cold INTAKE valve clearance:. This is a stock replacement engine with no power adders. I don't like working on hot engines. ) Item Specified value Intake Cold 0. At ignition-TDC of cylinder 1, check the valve clearance of the intake valves of cyl. , but that seems pretty loose and even by the time it warms up, it still sounds like a hand grenade. By admin, on September 25th, 2011 Toyota 22R and 22R-E engine factory workshop and repair manual. causing excessive valve chamber oil mist venting to the inlet air filter box (possibly wetting the element). with a mild cam. thanks for any input. Like a carburetor, the throttle body's function is to introduce air to be mixed with fuel for the combustion process. Running 5w-30 Castrol conventional. We dispel myths about valve-to-piston interference, with some new tech insights and advanced techniques for measuring and setting V-P clearance. Clean the valve cover thoroughly with a lint-free rag. 4 are tight. I admit it, I have dial-up. 15mm HOT: Exhaust valve: 0. com TPS testing. Check the valve clearance with the arrow shown in Figure. IMO they are costly to build for the power and reliability you get. 00 when hot for best performance. The engine's economical. but the clearance is always small when taken in the hot condition and that cannot be exact one. I was doing some research and it seems to be a somewhat common practice to adjust valves on these engines to. from the FSM can someone tell me the specs for COLD valve clearances for a 92 22re engine. 288,000 km and no valve adjustment yet OK, that photo and discussion scared me a bit. 1 oil pan to make the engine compact. 08mm for intake and 0. these engines make noise, it means they are happy. ) in addition to the easy stuff. Solid lifters were commonly used on the early 144/170ci motors, while hydraulic lifters were used on the later 144/170ci and all 200/250ci engines. 011 inch for intake; 0. Each time the valve opens, the feeler gauge will be clamped tightly between rocker and stem. Major camshaft manufacturers recommend setting valves cold, to avoid erroneous adjustments on lifters that may be "pumped up" If you are setting valves on a fresh engine that has not been run, everything should be well lubricated before you begin. INSPECTION AND ADJUSTMENT OF VALVE CLEARANCE HINT: Inspect and adjust the valve clearance when the engine is cold. 012in when the motor is warm. * Check EGR system. Neway Valve Seat Cutting; Piston & Connecting Rod Tools; Porting & Polishing; Sunnen; Torque Honing Plates; Valve Clearance Discs; Vacuum Testers; Valve Grinding; Valve Guide Tools; Valve Seat Grinding; Valve Seat Tools; Valve Spring Inserts - VSI; Valve Spring Testers; Valve Spring Tools; Valve Stem Seal Tools; ZERO Blast Cabinets and Parts. • Recommended Hot Supply: 60°C to 65°C (Note! The mixing valve can operate at temperatures up to 85°C for short periods without damage. I attempted to do this hot valve adjustment (while engine is running) My question to everyone is how do you tighten the screw while the valve is jumping up and down? There is a screw that is in the middle of the bolt on each valve. Can anybody tell me what the valve clearances & head torque is on the 4. Does any one have the specs for valve clearance. ) Corvette engines (and in '67-'69 Camaro 302/290 Z/28 engines); this cam has VERY long. Toyota 22R, 22RE, 22REC Engine Rebuild Parts. * Check idle air control valve (if equipped) and wiring. The motor is a 1970. When engine reachs full operating temperature, needle at exactly half way, and let it run for few minutes, I start hearing what apears to be a valve tappet noise or some sort of knocking. It is to ensure that the valve closes properly when it expands as it gets to operating temperature. You can also run the lash as small as. It does FEEL like it revvs more freely and has more power after switching but that might have been wishful thinking. Compensating for a Cold Engine when Adjusting Valve Lash. 1799 for more information. Unlock the rear cargo bed, using the release lever, and lift the bed into its fully raised position. )( cold ) FB460V 0. " Shafrioff told us to set the valve lash with a cold engine and check the valve lash weekly with the engine at ambient air temperature. 00 when hot for best performance. 5:1, which is a max lift measurement), so the clearance ramp, which is exactly. alot of people adjust them to. The 3RZ engine was designed for the off-road and commercial vehicles. For example, when starting a cold engine in 20-degree weather and using 20/50 oil, the relief valve will open and protect the engine from extreme pressures that can damage engine seals. The parts and labor required for this service are. Skip navigation Sign in. 6:1 comp, lc efi pro cam, full egr delete, lc. I find the best way to check/adjust the tappets is to close each valve in turn and using the feeler gauges in the clearance, move the crank slowly each way and 'feel' for the point were there is least resistance. It should be regarded. The mower lacks power. As guides wear, the side to side movement can cause valves to seat improperly. I worked at a golf club where I serviced 48 gas and 18 electric E-Z-GO cars. Learn more below about the 5 signs of a faulty cold start valve and how to fix them. Basically, smoke from a diesel engine indicates that something is not right. * Check engine compression, valve clearance, valve timing and timing belt (if equipped). cold valve clearance #683887 Thu Oct 07 2010 still a few days away from actually starting the engine but i am planning on setting the valve clearance in the. Onan man why couldn't a person put a stud with a nut in that rear position with a copper washer ? You'll need intake exhaust an lifter cover gaskets an thats about it. I put a Motad SS system on during the summer, lots of popping and banging on the overrun but apparently they all do that. Essential tools required in performing certain service work are identified in this manual and are recommended for use. When you make the valve lash smaller you not only get more valve lift opening, but also more duration because the rocker arm will then. This is because the exhaust valves share the same rocker arm, so to get an accurate reading you need one feeler gauge for each valve. My money says the 22r IS an interference engine. Corrected by Service Bulletin: Album click to view. Unfortunately, the use of a feeler gauge is satisfactory only if the rocker faces are in good condition. The intake valve diameter is 34. 6) Similar to adjustment procedures used for #1 cylinder, adjust the #3, #2 and #4 cylinder valve clearances. If the clearance is excessive, the valve won't open as much and will restrict the air flow in the intake valve and the exhaust flow out the exhaust valve. Valve lash is the available clearance (or gap) between the rocker arm and the tip of the valve stem when the lifter for. To measure the clearance on the exhaust valve, rotate the motor clockwise until the timing wheel is at 10 degrees BTDC on the exhaust stroke. Effect Of Changes In Cam Timing And Lobe Separation Angle The following tables illustrate how variations in lobe separation angle and cam timing will effect the behavior of the engine in which the camshaft is installed. The engine must be at normal operating temperature to obtain the proper valve clearances. If adjustment is required, loosen the allen set screw in the center of the nut on the rocker arm and adjust the nut to obtain the proper clearance. If you want to rebuild your engn, 'builder strong the first time!. Among the signs of a faulty cold start valve are difficult starts, no start at all, engine flooding and start/stop issues. In other words not stone cold and not 190°. Building the best 22R engine has been Jim's thing for 15+ years. thanks for any input. Small Engine Specs Engine Specs. 2) Adjust intake valve(s) on cylinders No. Toyota 4Runner 1996-2002: How to Replace Valve Cover Gaskets. 37:1 (not the design 1. Unfortunately its virtually impossable to set them hot. 4G63 is built on the framework of G63B, an 8V motor with SOHC carburetor, employed for several Mitsubishi automobiles till … 4G63 Engine Read More ». Install an appropriate tappet based on the results of the valve clearance inspection. My engine says it's a 156FMI (no -1 or -2) and it's a 2012 lexmoto xtrs. I can't find anything for the cold setting. 002 inch and the exhaust at 0. 2 Gu in June ,and the workshop replace the rear main and had the flywheel machined,,it was all fine until about 4 weeks ago,it seems to have developed a oil leak. Posted by Lawrence Birchad on 29th Sep 2014. Sedans and high-performance sports cars have very low ground clearance while hatchbacks are on the next step of the ladder. If any of you think you can predict how the various components of an engine will grow, or not, at operating temp, well that's one up on me. While the valve is closed, you will be able to slide the gauge in and out. 005" should be added to the clearance settings given below Valve Lash - Clearance settings - see links to GM document at the bottom of this page. 1799 for more information.