Valve spring shims are not necessary for most people. They can be beneficial for people who have high lift camshafts or who are running at high RPMs, but for most people they are not necessary.
Valve springs are designed to keep the valves closed at high engine speeds. The springs are wound to a specific tension and installed so that they are under compression. If the springs were not there, the valves would "float" and not close properly. The amount of compression can be varied by changing the spring rate and/or the installed height. If the installed height is decreased, the spring will be under more compression. This will make the spring harder to compress, which is what we want. However, if the installed height is decreased too much, the spring will reach
Valve shims are small, thin pieces of metal that are used to adjust the clearance between the valve and the valve seat. The shims are placed between the valve and the valve seat, and the clearance is adjusted by adding or removing shims. The shims are available in a variety of thicknesses, and the thickness of the shim determines the amount of clearance that is created. To calculate the thickness of the shim that is needed to create the desired clearance, the following formula is used: Shim thickness = (Valve clearance) / (Val
If you are using a standard sizebind plug, the coil should be about 3/4 inch away from the bind. If you are using a micro size bind plug, the coil should be about 1/8 inch away from the bind.
3.7/5
Precision - COMP Cams shims are crafted from the finest shim stock steel to precise dimensions, ensuring consistent installed height adjustments from the first valve to the last.
Made in USA
Recommended for use with our 26981, 980, 981, 941, 26921, 26975, 26915, 26918, 26925, 26926, 26526 and 7230 valve springs.
Available in an assortment pack under part number 4753.
1. 250" Outside Diameter, 0. 814" Inside Diameter. Includes 16 0. 015" Thick Shims
Race Tough - COMP Cams valve spring shims are not only made from the highest quality shim stock available, they are also heat treated to withstand the most radical camshaft profiles.
Must-Have for Your Next Engine Build or Spring Upgrade - Production tolerances in cylinder heads, valve lengths, valve springs, retainers and locks can impact the valve spring installed height from valve to valve, greatly impacting spring seat and open pressures. COMP Cams spring shims are a must-have to ensure precise installed height on intake and exhaust valves.
$234
I'll be the first to admit that I drastically overestimated the number of shims needed to install Comp 910 springs on my 7.3 Powerstroke. I had just bought the 0.015 and 0.030 shims when I realized I needed a 0.060 0.015 on the first exhaust valve and a 0.030 0.015 on the intake valve (this ended up being the closest match to the recommended spring seat height for nearly every pair of valves). I had 190,000 miles on the engine (and it had a hard past life towing gooseneck trailers full-time), so this looked like a decent opportunity to replace all of the injectors at once (springs needed to swap all injectors for performance injectors). If you decide to purchase the set of all three sizes of shims, you can save money if you haven't previously done so like I did.
3.3/5
1.250" Outside Diameter, 0.814" Inside Diameter. Includes 16 0.015" Thick Shims, 16 0.030" Thick Shims and 16 0.060" Thick Shims.
Must-Have for Your Next Engine Build or Spring Upgrade - Production tolerances in cylinder heads, valve lengths, valve springs, retainers and locks can impact the valve spring installed height from valve to valve, greatly impacting spring seat and open pressures. COMP Cams spring shims are a must-have to ensure precise installed height on intake and exhaust valves.
Made in USA
Guaranteed Precision - COMP Cams shims are crafted from the finest shim stock steel to precise dimensions, ensuring consistent installed height adjustments from the first valve to the last.
Recommended for use with our 26981, 980, 981, 941, 26921, 26975, 26915, 26918, 26925, 26926, 26526 and 7230 valve springs.
Available Separately - 1.250" Outer Diamter spring shims are available in thickness specific sets of 16 and indivudally under part numbers 4736-16/-1 (.015"), 4742-16/-1 (.030"), 4748-16/-1 (.060").
Race Tough - COMP Cams valve spring shims are not only made from the highest quality shim stock available, they are also heat treated to withstand the most radical camshaft profiles.
$234
I'll be the first to admit that I drastically overestimated the number of shims needed to install Comp 910 springs on my 7.3 Powerstroke. I had just bought the 0.015 and 0.030 shims when I realized I needed a 0.060 0.015 on the first exhaust valve and a 0.030 0.015 on the intake valve (this ended up being the closest match to the recommended spring seat height for nearly every pair of valves). I had 190,000 miles on the engine (and it had a hard past life towing gooseneck trailers full-time), so this looked like a decent opportunity to replace all of the injectors at once (springs needed to swap all injectors for performance injectors). If you decide to purchase the set of all three sizes of shims, you can save money if you haven't previously done so like I did.
3.3/5
Precision - COMP Cams shims are crafted from the finest shim stock steel to precise dimensions, ensuring consistent installed height adjustments from the first valve to the last.
1. 500" Outside Diameter, 0. 645" Inside Diameter. Includes 16 0. 030" Thick Shims.
Available in an assortment pack under part number 4757.
Must-Have for Your Next Engine Build or Spring Upgrade - Production tolerances in cylinder heads, valve lengths, valve springs, retainers and locks can impact the valve spring installed height from valve to valve, greatly impacting spring seat and open pressures. COMP Cams spring shims are a must-have to ensure precise installed height on intake and exhaust valves.
Race Tough - COMP Cams valve spring shims are not only made from the highest quality shim stock available, they are also heat treated to withstand the most radical camshaft profiles.
Recommended for use with our 916, 26056, 917, 928, 929, 924, 925, 911, 954, 936, 938, 930, 953, 999, 26094, 943, 26055, 939, 927, 919, 933, 935, 944, 26095, 26097, 932, 26089, 955, 26115, 26099 and 26547 springs.
Made in USA
$234
I'll be the first to admit that I drastically overestimated the number of shims needed to install Comp 910 springs on my 7.3 Powerstroke. I had just bought the 0.015 and 0.030 shims when I realized I needed a 0.060 0.015 on the first exhaust valve and a 0.030 0.015 on the intake valve (this ended up being the closest match to the recommended spring seat height for nearly every pair of valves). I had 190,000 miles on the engine (and it had a hard past life towing gooseneck trailers full-time), so this looked like a decent opportunity to replace all of the injectors at once (springs needed to swap all injectors for performance injectors). If you decide to purchase the set of all three sizes of shims, you can save money if you haven't previously done so like I did.
3.3/5
Guaranteed Precision - COMP Cams shims are crafted from the finest shim stock steel to precise dimensions, ensuring consistent installed height adjustments from the first valve to the last.
1.250" Outside Diameter, 0.814" Inside Diameter. Includes 16 0.060" Thick Shims.
Made in USA
Must-Have for Your Next Engine Build or Spring Upgrade - Production tolerances in cylinder heads, valve lengths, valve springs, retainers and locks can impact the valve spring installed height from valve to valve, greatly impacting spring seat and open pressures. COMP Cams spring shims are a must-have to ensure precise installed height on intake and exhaust valves.
Available in an assortment pack under part number 4753.
Race Tough - COMP Cams valve spring shims are not only made from the highest quality shim stock available, they are also heat treated to withstand the most radical camshaft profiles.
Recommended for use with our 26981, 980, 981, 941, 26921, 26975, 26915, 26918, 26925, 26926, 26526 and 7230 valve springs.
$234
I'll be the first to admit that I drastically overestimated the number of shims needed to install Comp 910 springs on my 7.3 Powerstroke. I had just bought the 0.015 and 0.030 shims when I realized I needed a 0.060 0.015 on the first exhaust valve and a 0.030 0.015 on the intake valve (this ended up being the closest match to the recommended spring seat height for nearly every pair of valves). I had 190,000 miles on the engine (and it had a hard past life towing gooseneck trailers full-time), so this looked like a decent opportunity to replace all of the injectors at once (springs needed to swap all injectors for performance injectors). If you decide to purchase the set of all three sizes of shims, you can save money if you haven't previously done so like I did.
3.3/5
Must-Have for Your Next Engine Build or Spring Upgrade - Production tolerances in cylinder heads, valve lengths, valve springs, retainers and locks can impact the valve spring installed height from valve to valve, greatly impacting spring seat and open pressures. COMP Cams spring shims are a must-have to ensure precise installed height on intake and exhaust valves.
Recommended for use with our 916, 26056, 917, 928, 929, 924, 925, 911, 954, 936, 938, 930, 953, 999, 26094, 943, 26055, 939, 927, 919, 933, 935, 944, 26095, 26097, 932, 26089,955, 26115, 26099 and 26547 springs.
Available Separately - 1.500" Outer Diamter spring shims are available in thickness specific sets of 16 and indivudally under part numbers 4739-16/-1 (.015"), 4745-16/-1 (.030"), 4751-16/-1 (.060").
Race Tough - COMP Cams valve spring shims are not only made from the highest quality shim stock available, they are also heat treated to withstand the most radical camshaft profiles.
Made in USA
1.500" Outside Diameter, 0.645" Inside Diameter. Includes 16 0.015" Thick Shims, 16 0.030" Thick Shims and 16 0.060" Thick Shims.
Guaranteed Precision - COMP Cams shims are crafted from the finest shim stock steel to precise dimensions, ensuring consistent installed height adjustments from the first valve to the last.
$234
I'll be the first to admit that I drastically overestimated the number of shims needed to install Comp 910 springs on my 7.3 Powerstroke. I had just bought the 0.015 and 0.030 shims when I realized I needed a 0.060 0.015 on the first exhaust valve and a 0.030 0.015 on the intake valve (this ended up being the closest match to the recommended spring seat height for nearly every pair of valves). I had 190,000 miles on the engine (and it had a hard past life towing gooseneck trailers full-time), so this looked like a decent opportunity to replace all of the injectors at once (springs needed to swap all injectors for performance injectors). If you decide to purchase the set of all three sizes of shims, you can save money if you haven't previously done so like I did.
3.3/5
Must-Have for Your Next Engine Build or Spring Upgrade - Production tolerances in cylinder heads, valve lengths, valve springs, retainers and locks can impact the valve spring installed height from valve to valve, greatly impacting spring seat and open pressures. COMP Cams spring shims are a must-have to ensure precise installed height on intake and exhaust valves.
Made in USA
Recommended for use with our 26995, 26986, 920, 972, 926, 914, 978, 977, 940, 950, 26956 and 26955 springs
Race Tough - COMP Cams valve spring shims are not only made from the highest quality shim stock available, they are also heat treated to withstand the most radical camshaft profiles.
Available Separately - 1.480" Outer Diamter spring shims are available in thickness specific sets of 16 and indivudally under part numbers 4738-16/-1 (.015"), 4744-16/-1 (.030"), 4750-16/-1 (.060").
Guaranteed Precision - COMP Cams shims are crafted from the finest shim stock steel to precise dimensions, ensuring consistent installed height adjustments from the first valve to the last.
1.480" Outside Diameter, 0.765" Inside Diameter. Includes 16 0.015" Thick Shims, 16 0.030" Thick Shims and 16 0.060" Thick Shims.
$234
I'll be the first to admit that I drastically overestimated the number of shims needed to install Comp 910 springs on my 7.3 Powerstroke. I had just bought the 0.015 and 0.030 shims when I realized I needed a 0.060 0.015 on the first exhaust valve and a 0.030 0.015 on the intake valve (this ended up being the closest match to the recommended spring seat height for nearly every pair of valves). I had 190,000 miles on the engine (and it had a hard past life towing gooseneck trailers full-time), so this looked like a decent opportunity to replace all of the injectors at once (springs needed to swap all injectors for performance injectors). If you decide to purchase the set of all three sizes of shims, you can save money if you haven't previously done so like I did.
Valve springs are one of the most important components in an engine. The springs ensure that the valves open and close at the correct time, and they also help to keep the valves from bouncing. The installed height of the springs is critical to the proper function of the engine. If the springs are not installed correctly, the engine will not run properly and could cause damage to the valves.
Valve springs are an important part of the valvetrain in any internal combustion engine. They are responsible for providing the force needed to open the valves at the correct time and then close them again. The tension on the springs must be correct in order for the engine to run properly. If the springs are too loose, the valves will not open far enough and the engine will not run correctly. If the springs are too tight, the valves will open too far and the engine will also not run correctly. The correct tension for the springs can be found in the service manual for
Shims are used to adjust the clearance between the valve and the valve seat. The shim sits on top of the valve and is held in place by the valve spring. The shim can be moved up or down to adjust the clearance.
Shims are used in engines to adjust the clearance between moving parts. The most common use for shims is to adjust the clearance between the valves and the valve seats in an internal combustion engine.
Shimming a valve spring is a process of adjusting the spring tension on a valve so that it is properly seated. This is done by adding or removing shims from the spring.
If you don't adjust your valve clearances, you risk damaging your engine. The valves will start to hit the pistons, which will cause a knocking noise. Eventually, the valves will break and the engine will seize up.
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