C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Valve Spring Removal

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Old May 30, 2002 | 10:10 PM
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Default Valve Spring Removal

How much air pressure do I need in my cylinders to hold the valves up during valve spring removal ?
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Old May 30, 2002 | 10:44 PM
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Default Re: Valve Spring Removal (STL94LT1)

Very little. :D

I don't even use air pressure, I just turn the crank to where both valves are closed for a given cylinder, then pull the rockers and remove the springs. The piston will be close enough to TDC to prevent the valve from falling in.
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Old May 31, 2002 | 09:12 PM
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Default Re: Valve Spring Removal (STL94LT1)

How much air pressure do I need in my cylinders to hold the valves up during valve spring removal ?

Anyone ?
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Old Jun 4, 2002 | 01:27 AM
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Default Re: Valve Spring Removal (STL94LT1)

Damn good question, I am about to do it too.

What is the normal compression pressure in the cylinder? I suspect we shouldn't go over that. Also keep your hands clear as the engine could rotate quickly when the air is applied. :eek:
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Old Jun 4, 2002 | 09:47 AM
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Default Re: Valve Spring Removal (BBA)

Very little. :D

I don't even use air pressure, I just turn the crank to where both valves are closed for a given cylinder, then pull the rockers and remove the springs. The piston will be close enough to TDC to prevent the valve from falling in.
Thanks for the tip BBA, I used your method, it worked great. I started to pressurize the cylinders, but it was too hard getting the air fitting in the sparkplug holes.
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