badcoupe

I a retorque on the head necessary? I have raceware studs and stock gasket. I've heard yes and no anyone have a def answer? Bad experience etc. Thanks

Ski

I think it is a recommendation from Raceware but it is left up to you. jwl, on his 2.8L did a retorque.

MichelleJD

IIRC you need to retorque for Raceware, but not for stock. I did not retorque mine as they are stock. Did you rest between each step of the original torquing? If not, I would definitely retorque. HTH.

jwl

The therory is that the stock head gasket will compress or "settle" a minute amount during the first heat cycle. When torqued, the OEM studs stretch and compensate for this "settle" whereas the Raceware don't stretch and need to be retorqued.

MichelleJD

Yeah, what he said^^^

Tom M'Guinn

Raceware says to retorque after the first heat cylce when using their studs with stock or WF gaskets. (Not needed for stock studs.) I've done it three times. The first two times, it was a waste of time because the nuts were still torqued to spec. The third time, the nuts were a bit under-torqued after the first heat cycle.

OriginalSterm

i'm assuming this would be different when using a cometic head gasket?

Ski

I would still retorque again. I think it would be left up to the individual but most times, not all, that people replace head studs the engines are out of the car. It would be a shame after all the hard work to let a retorque ruin any of that.

hosrom_951

Little OT:
How many times could the stock studs be re-used?

Tom M'Guinn

A while back, I called raceware to ask about the retorque requirement (trying to get out of the extra work). As explained to me, the stock or WF head gasket can settle or further compress when it gets up to operating temperature for the first time. So, for example, they told me that it does not help to let the engine sit overnight on a stand before retorquing. I did not ask about a Cometic gasket -- but it's a good question. That might be reason that finally gets me to switch to Cometic.

pk951

When there is a next time i will not do a re-torque with raceware studs!

All studs were fine after heat cycle. I torqued them to 75 ft-lbs on first cycle.

Raceware does recmmend a re-torque.

Gator_86_951

The stock studs are stretch-type. You would need to individually measure each one and see if they are out of spec. However, many people have gotten away with re-using the stock head studs a number of times. YMMV

Tom M'Guinn

What spec would you be measuring against? Porsche says to throw them away...

Konstantin

have you or anyone else ever saw a writen document where Porsche say that you must replace them?

I never saw something like this but I heard from others many times

Konstantin

Eyal 951

i pulled my head, installed the head and torqued, installed the headers, broke a stud, pulled the head before running it, replace ALL exhaust studs, installed the head and torqued, then ran it, all on stock studs. They seem fine. I also went over torque by a few degrees of a turn, becuase thats how i am, and i don't mind having the head sit a tiny bit lower, haha.
~Eyal