Engine/Transmission (1998.5 - 2002) Boost-Headgasket ?

[GIT-R-DONE]

I would like to get an idea how much boost a stock head gasket can take before blowing. With a new turbo in the works, just wondering how far it can go. Thanks Don

 

[jwilliams3]

Don,

There is not really a specified number.

Anywhere above 40 and I would start worrying.



But, you might consider retorquing your head bolts, this will save you from having to swap headgaskets in the near future.



If you stay under 40psi you should be safe for a long time.



45 and above, its time to O ring or fire ring.



Just watch your driving habits and let the truck warm up fully before gettin on the boost.



--Justin

 

[Chipstien]

Like Justin says, every truck is different. For your information I have been running 57 psi on the stock headgasket for over a year and have yet blown it. However I am pushing it. Some have blown with as little as 40-ish.

 

[TURBOs4LIFE]

Just a thought though if you oring or firering and u blow either. It will alway have to be oringed or fireringed! There is no going back to stock headgasket. I decided not to do it for that reason!

 

[Chipstien]

Since we are on this subject, what are the downfalls to o-ringing and fire-ringing? Why would you want to go back? Also, what are the differences between o-ringing and fire-ringing. Seems to me that once it has been done you would have no reason to go back to the original headgasket.

 

[DHatfield]

My headgasket on my truck was okay for a couple of months at 46PSI, but as soon as I added the comp and boost went to 50+PSI (gauge stops at 50), but headgasket blew within one day.

 

[ThrottleJockey]

DHatfield



It wasn't the 4 or 5 extra pounds of boost. Your truck would've handled 46 psi ALL its life.



It was the timing.



Ahh, the ole ETH.



Brian