awd-rwd racer

iTrader: (16)

bought a set of ported 317's and they have a cracked valve guide. it appears they are 4-13 bucks a piece to replace them, Just wondering if anyone has tackled this before?

96capricemgr

iTrader: (1)

This is not a $20 repair, it is not simple as hammering the old one out and hammering the new in. Take it to a shop and get a quote.

awd-rwd racer

iTrader: (16)

any idea what it would run?

96capricemgr

iTrader: (1)

I know a few guys who bought "professionally" ported LT1 heads and found many guides cracked from improper installation of bronze liners ended up spending $600ish to repair a complete pair of heads. Not sure what that means for an individual guide pricing other than being reasonable enough to pursue.

KCS

iTrader: (20)

Why not? What else do you think needs to be done?

The_Bishop

iTrader: (10)

The guide needs to be pressed out, and a new one pressed in, then resized to the correct valve stem clearance. You cannot do this at home with hand tools.

awd-rwd racer

iTrader: (16)

I dropped the head off at the shop this morning. they said it will be between 50-100 bucks,,,

96capricemgr

iTrader: (1)

You mean you can't just hammer one out hammer it in and drill it for valve clearance?

The_Bishop

iTrader: (10)

Yeah, sure. Go with that. Use a 3/8 drill, the extra clearance will reduce friction and make more power.

KCS

iTrader: (20)

There's a local shop that uses a broach. They replaced three guides in my 243 heads for $50 and the clearance was spot on.

96capricemgr

iTrader: (1)

and using a broach was how one lt1 specializing shop made a habit of cracking guides.

KCS

iTrader: (20)

Cast iron or bronze?

96capricemgr

iTrader: (1)

bronze liners in iron guides