Valve guides

Paul V8 · Post by **Paul V8** » Sat Dec 08, 2007 4:47 pm

Hello, i'm fitting some short bullet type valve guides, how much should i have sticking out the top by the spring? Any ideas?

mgbv8 · Post by **mgbv8** » Sat Dec 08, 2007 7:47 pm

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.

Paul V8 · Post by **Paul V8** » Sat Dec 08, 2007 8:17 pm

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.

davemgb · Post by **davemgb** » Sat Dec 08, 2007 9:50 pm

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