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Valve guides
Posted: Sat Dec 08, 2007 4:47 pm
by Paul V8
Hello, i'm fitting some short bullet type valve guides, how much should i have sticking out the top by the spring? Any ideas?
Posted: Sat Dec 08, 2007 7:47 pm
by mgbv8
Depends on what cam you are using.
I told Real Steel what cam I was going to use and they trimmed the tops of my fitted guides down to suit.
Posted: Sat Dec 08, 2007 8:17 pm
by Paul V8
I'm using mod'd guides to take the late type stem seal, not sure how much of the guide to leave exposed, not sure on cams yet, proberly the crower 50232.
Posted: Sat Dec 08, 2007 9:50 pm
by davemgb
Installed height of the later guides is 15mm but I think the distance piece LRT-12-519 used when driving them in might be longer since it bears on the spring seat not the collar around the guide.
Are your guides made slightly oversize ( +0.025mm ) to ensure a good interference fit?
You'll need to ream the guides insitu to ensure they are the right size, factory valves are 8.70mm or 0.342 inch.
Dave