der Mond

I have a great running '87 3.2 at 141K miles but have recently become aware of the Dilavar head stud achilles heel. I have no reason to suspect a broken stud but was not aware of the chance to check when I did my last valve adjustment. How many of you have found broken studs? What did you do about it?

Diamond Blue

88 Carrera with 88,000 miles I found 2 broken studs when I did a valve adjust. I ended up needing the heads done and went to 3.4 P&C's. The car is stored winters and had the epoxy coated studs. IMHO dilavars will fail, it's just a matter of time. I wouldn't worry much about it until it happens. Mine fell out when I took the valve covers off.

Chulo

'88 Carrera with 71,000 miles. No issues whatsoever.

gbailey911

My 87 Carrera has 81,000 miles and no problems with the studs. Valve guide wear is a bigger concern to me.

samuel kinter

when I had my top end rebuilt@100k miles they put my engine back together and test ran it when the shut down the motor one of the studs shot out and put a good sized hole in the cement floor.needless to say we replaced ALL the the studs.

917 FAN

My 87 has about 130,000 miles on it (wow) and has no stud issues. Valve guides=YES

gerry100

Mine is an '86 3.2.

Bad stud at 98K, had them all replaced with Raceware,and did valve guides and rings while in there.

g-50cab

bad valve guides at 55,000 miles - 3.4 extrude hone, supertech head studs and 993ss cams

Chris57

A head stud shot out and put a good size hole in the cement floor? I must have had too many beers? the head studs run horizontally so how did one hit the floor. I will have to read this in the morning to see if it makes sense sober. beware of flying head studs! LOL

gerry100

Maybe his engine was not only "bulletproof" but actually had the ability to shoot back.