Sealing Turbo Heads ?

[David Goodman]

When assembling the 3.3L turbo head (no gasket), it it done dry or do you use the loctite 574 ?
Thanks,
Dave

[ChrisBennet]

Dry

[Wayne 962]

The head to cam tower interface uses the Loctite 574...

-Wayne

[ChrisBennet]

Originally posted by Wayne at Pelican Parts
The head to cam tower interface uses the Loctite 574...

-Wayne

Good point. I assumed you were talking about the cylinder to head interface.
-Chris

[David Goodman]

Thanks Guys. Yes, I was referring to the head to cylinder interface.
Dave

[911pcars]

How does this metal-to-metal, no-gasket head sealing method work out in the long run? I'd think some sort of copper o-ring and groove system would provide a more positive seal. No issues here?

Sherwood Lee
http://members.rennlist.org/911pcars

[TimT]

A stock 930 rebuild uses no sealing gasket between the cylinder and head. When building a higher performance 930,sometimes the cylinder and the head is machined to recieve a nirosist ring. Its almost an interference fit between the nirosist ring, the cylinder and the head. This helps keep the cylinder sealed when pushing higher than stock boost.

[Wayne 962]

The aluminum is soft - so it sortof acts as it's own gasket. It's common not to run a gasket on the VW air cooled engines...

-Wayne

[cowtown]

It's interesting that my '77 930 engine (3.0) DOES use a CE-style sealing gasket between cylinder and head. I guess when the factory went to 3.3 they decided it was unnecessary.
Colin

[cstreit]

Did the same when they moved from 3.0L to 3.2