1977 3.0 Replacing Headbolts

[5string]

What are the best replacement Headbolts for a Euro spec 1977 3.0 engine? The car is a '77 911 Carrera 3.0.

[MBEngineering]

HI 5string
you have a choice of;

Supertec From P.Parts, set Part #:SPTC-HSK-1 Brand:Supertec Performance $637.00


ARP kit ARP - The Official Site |*Porsche*Kits

STD steel 911 101 172 00 £7.38 each

993 Late Dilavar 993 101 170 51 £23.31 each


regards mike

[lindy 911]

Supertec

[5string]

The original had dilavar , i quess the replacements are suppose to be better? big difference in price on the steel and dilavar.

[lindy 911]

I have four sets of Dilavar you can have for free. Does that tell you something?

[5string]

I get the message, will the std(standard) steel hold up for a stock 3.0 with no modifications for the long haul?

[tom1394racing]

Steel studs will be fine for a stock rebuild

[5string]

Thanks

[Roslin]

I added 12 new 993 Dilavar in the bottom, when i rebuild mine in 2006 . I'm convinced a little bit different here - When Porsche still after many years, also with negative success with Dilavar during the years, they might have an idea with it, so therefore i used the newest coated full threaded OE 993 items.
I know there are many many opinions on this here, but maybe i'm just a bit Authoritarianism to Porsche :-)
It could be interesting to ask one of the responsible Engineers at Porsche : " Why did Porsche offer so much energy on development of these fasteners ?"

I think i've head someone here on the board saying that time - when using the high tensile after marked items, it should/could be necessary to re-torque them ?? I this is the case, it is also an argument for me to select factory items for use in a more ore less std. road engine.

Roslin

[Henry Schmidt]

I wouldn't use Dilivar in an old lawn mover. But hey, that's just me.

[afterburn 549]

What goes Bing! in the middle of the night?
According to B.A. he had them break brand new on the engine stand..
Its just good information to consider.

[tom1394racing]

Supposedly the 993 fully threaded Dilivar studs are more robust than the earlier Dilivar studs. I have no experience with these. I can say that I have seen stress corrosion fractures in Dilavar studs in all applications including the 3.6 964 engines.

I have never seen a fractured steel stud.

Just my experience.