BHG Prevention

damdog05 · 06-09-2006, 06:40 AM

i recently had an engine installed in my car that has about 80k miles on it. im not showing any signs of a bhg but i dont want to have to deal with it. would going in and retorquing the head bolts prevent/delay a bhg? is it worththe effort or should i just go ahead and replace the head gasket if im going in there?

ddmcse · 06-09-2006, 10:46 AM

turbo or n/a ?

well it really doesn't matter it's bound to blow , if you have the means i'd replace it

j3pz · 06-09-2006, 03:33 PM

from my understanding the main reason these hg blow is because they were not torqued enough from factory. ive also read that by retorqueing them to about 72-80 lb/in should prevent this. im not going so far as to say it wont ever blow a hg, but im sure it wont happen for a while as long as the hg is in good condition, put on correctly, and finally retorqued.

suprra_girl · 06-09-2006, 09:30 PM

well it can go one of two ways

it may prevent it or it may well just crush it and cause you to blow one anyway

mrnickleye · 06-09-2006, 10:41 PM

We have a saying....If it ain't broke, don't fix it.

If you are driving the car long distances regularly, and need to depend on it, you may want to replace the gasket at your convenience, rather than a major inconvience.

I've done a couple of hundred head gaskets over the years, and know 20+ people that do major engine work, and my feeling is......re-torques won't help.

And as suprragirl said, you'll probably cause it to leak.

These cars BHGs are 90% combustion gasses get blown into the cooling system, and then pressurize it, then it blows over into the bottle. So...you'll have plenty of warning that its started to go bad.

try not to drive to long when it does start to fail, because you can cause some pitting to the head and block surfaces from hot spots and cavitation at the bad spot, which is usually at the #6 cylinder area.

damdog05 · 06-10-2006, 03:36 AM

alright. thanks guys...and girls. i think ill leave it alone since im not currently having problem.

06-09-2006, 06:40 AM	#1
damdog05 12psi boost Join Date: Apr 2006 Location: Georgia Posts: 250	BHG Prevention i recently had an engine installed in my car that has about 80k miles on it. im not showing any signs of a bhg but i dont want to have to deal with it. would going in and retorquing the head bolts prevent/delay a bhg? is it worththe effort or should i just go ahead and replace the head gasket if im going in there? __________________ My cars: 85 Trans Am- Ehhh- Gone 83 Rx7- Much Better- Gone 86.5 Supra- Love- Not Gone

06-09-2006, 10:46 AM	#2
ddmcse 500whp yet? Join Date: Jun 2005 Location: CT U.S.A. Posts: 966	turbo or n/a ? well it really doesn't matter it's bound to blow , if you have the means i'd replace it __________________ 300+ RW HP Dyno run, jdm,mod turbo,3"exh,electfan,greddyboost Blown HeadGasket info My Supra KiXGaS

06-09-2006, 03:33 PM	#3
j3pz 500whp yet? Join Date: Nov 2005 Location: Mechanicsville, MD, US of A, 20659 Posts: 1,060	from my understanding the main reason these hg blow is because they were not torqued enough from factory. ive also read that by retorqueing them to about 72-80 lb/in should prevent this. im not going so far as to say it wont ever blow a hg, but im sure it wont happen for a while as long as the hg is in good condition, put on correctly, and finally retorqued. __________________ 88 N/A w/ 5spd - stock - not running, bhg 87 turbo/targa w/ 5spd- fidanza light weight flywheel, new oem slave cylinder, apexi air filter, no ac and no heat

06-09-2006, 09:30 PM	#4
suprra_girl 7M POWAH! ;) Join Date: Jun 2004 Location: New Zealand Posts: 2,312	well it can go one of two ways it may prevent it or it may well just crush it and cause you to blow one anyway __________________ Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first!

06-09-2006, 10:41 PM	#5
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	Been there, done that ! We have a saying....If it ain't broke, don't fix it. If you are driving the car long distances regularly, and need to depend on it, you may want to replace the gasket at your convenience, rather than a major inconvience. I've done a couple of hundred head gaskets over the years, and know 20+ people that do major engine work, and my feeling is......re-torques won't help. And as suprragirl said, you'll probably cause it to leak. These cars BHGs are 90% combustion gasses get blown into the cooling system, and then pressurize it, then it blows over into the bottle. So...you'll have plenty of warning that its started to go bad. try not to drive to long when it does start to fail, because you can cause some pitting to the head and block surfaces from hot spots and cavitation at the bad spot, which is usually at the #6 cylinder area. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

06-10-2006, 03:36 AM	#6
damdog05 12psi boost Join Date: Apr 2006 Location: Georgia Posts: 250	alright. thanks guys...and girls. i think ill leave it alone since im not currently having problem. __________________ My cars: 85 Trans Am- Ehhh- Gone 83 Rx7- Much Better- Gone 86.5 Supra- Love- Not Gone

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