re-torquing heads

[rllywgn]

So I've done my fair share of head gasket replacements in my day.. and i had a thought today (why it didnt come to me sooner i dont know) i have a 1989 toyota supra turbo that ive been tinkering on for years and one of the first things i did was retorque the head an extra few pounds as per suggestions from the supra community.

 

Anyone done this or have any thoughts on doing this?

I dont wanna do any more headgaskets on a ea82t for a while.

 

btw the supra 7M-GTE has a tendency to blow headgaskets also.. aluminum block and head and crappy headgaskets (metal is an option but pricey)

 

rllywgn

88 GL-10 turbo sedan

ft4wd~5spd~lsd

[Phizinza]

I have heard of doing this too. When I asked if I needed to re-torque my gaskets I was told by one that he take an extra step (you know, three steps, 29nm, 59nm and 64nm) beond the 64nm and goes to 70 to 75nm. I can see it might hold the gasket together better. But I have the feeling it might also weaken the gasket because of it being under more load then it was designed for. So far I haven't had to replace a blown gaskets, only had to replace them because of the stupid exhaust studs.

 

________

little Brat

www.offroadingsubarus.com

[tizzle]

there was a long discussion about this already

 

http://www.ultimatesubaru.org/forum/showthread.php?t=12239&highlight=torque+head+gasket

[Tycho]

My HGs actually had a "DO NOT RETORQUE" note on them. They were crap Fel-Pro units..but actually MLS! I was pleasantly surprised...almost made up for the lack of proper cam carrier o rings and all the trouble that caused.

 

12,000 miles later having overheated the engine wheeling in the summer and putting it through several -40F cold starts without it plugged in...there's no hint of any chamber pressure getting where it shouldn't and all the fluids are in order also.