1987 A/T supra suggestions

batmmannn · 06-23-2010, 07:19 AM

You guys always say BHG it's inevitable. I figure most of these cars have already had a head gasket replaced after 20 some odd years, so they can't all be ready to blow right? Toyota should have recalled them. Is it all years? You would think by 89 they would have known their mistake and corrected it on the assembly line.

Grandavi · 06-23-2010, 07:44 AM

From my research, there are 2 possible problems with the headgasket. The first was.. originally it was shy over 20 lbs of torque. After that, it was that the headbolts had a tendancy to stretch slightly (dont quote me on that.. its just whats I read.. never confirmed it).

The 7mGTE (not sure if the GE would suffer as badly) runs very hot compared to my other vehicles.. and thats another "bad" thing. However... I dont think a blown headgasket is inevitable.. Its just common. Once its been blown, if its done correctly, I think they are fine afterwards. Metal headgaskets are overkill for a stock engine.

Thats my understanding, but I am not a mechanic or an expert on it.

Bad Head gasket = more likely then on another vehicle.

btwilson86 · 06-23-2010, 07:50 AM

I think that since the BHG happens at different times on different Supras, there probably weren't enough soon enough to issue a recall. Figure everyone drives around 10,000 miles a year, a 86.5 would only have about 60,000 miles on it when the MKIII was discontinued, and since most head gaskets blow later than that, I doubt there were many of them they dealt with.

But I do agree with you, batmmannn, they either get replaced already or they don't blow as easily as we all think. I've owned 3 supras (all of them with at least 150,000 miles on them, and one of them a turbo) and none of them showed signs of a BHG. I have a 89 Cressida (another 7MGE Toyota) with over 250,000 miles, engine runs excellent. And I have 2 friends, both with 2 Supras each (one has a turbo, the other 3 are N/A's) all around the 200,000 mile mark, the only one with a BHG is the Turbo model.

So, cliffnotes: Probably not enough BHG during production, so no recall. Boost+low gasket torque=BHG, N/A's probably not so much.

btwilson86 · 06-23-2010, 07:51 AM

oops, looks like I was typing when Grandavi posted. Some of that now sounds repetetive lol

CanadianBak'inSupra · 06-23-2010, 12:45 PM

ive only owned one mk3 and guess what, you got it i blew the hg on my na with nohtin but headers...

thanks to color dyes i found it easily right away!

06-23-2010, 07:19 AM	#1
batmmannn 12psi boost Join Date: May 2010 Location: West Virginia Posts: 320	Your headgasket will blow You guys always say BHG it's inevitable. I figure most of these cars have already had a head gasket replaced after 20 some odd years, so they can't all be ready to blow right? Toyota should have recalled them. Is it all years? You would think by 89 they would have known their mistake and corrected it on the assembly line. __________________ 1987 N/A 7MGE Left Hand Drive MK3 Red 5 Speed and Black Auto Supras My Next project is the Batmobile!

06-23-2010, 07:44 AM	#2
Grandavi walbro fp Join Date: Jul 2008 Location: Calgary, Alberta, Canada Posts: 411	From my research, there are 2 possible problems with the headgasket. The first was.. originally it was shy over 20 lbs of torque. After that, it was that the headbolts had a tendancy to stretch slightly (dont quote me on that.. its just whats I read.. never confirmed it). The 7mGTE (not sure if the GE would suffer as badly) runs very hot compared to my other vehicles.. and thats another "bad" thing. However... I dont think a blown headgasket is inevitable.. Its just common. Once its been blown, if its done correctly, I think they are fine afterwards. Metal headgaskets are overkill for a stock engine. Thats my understanding, but I am not a mechanic or an expert on it. Bad Head gasket = more likely then on another vehicle. __________________ My Links: What I am doing... http://www.toyota-supra.info/forums/...part-list.html My questions http://www.toyota-supra.info/forums/...w-answers.html

06-23-2010, 07:50 AM	#3
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	I think that since the BHG happens at different times on different Supras, there probably weren't enough soon enough to issue a recall. Figure everyone drives around 10,000 miles a year, a 86.5 would only have about 60,000 miles on it when the MKIII was discontinued, and since most head gaskets blow later than that, I doubt there were many of them they dealt with. But I do agree with you, batmmannn, they either get replaced already or they don't blow as easily as we all think. I've owned 3 supras (all of them with at least 150,000 miles on them, and one of them a turbo) and none of them showed signs of a BHG. I have a 89 Cressida (another 7MGE Toyota) with over 250,000 miles, engine runs excellent. And I have 2 friends, both with 2 Supras each (one has a turbo, the other 3 are N/A's) all around the 200,000 mile mark, the only one with a BHG is the Turbo model. So, cliffnotes: Probably not enough BHG during production, so no recall. Boost+low gasket torque=BHG, N/A's probably not so much. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

06-23-2010, 07:51 AM	#4
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	oops, looks like I was typing when Grandavi posted. Some of that now sounds repetetive lol __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

06-23-2010, 12:45 PM	#5
CanadianBak'inSupra Official hall monitor / search nazi - NO SOUP FOR YOU! Join Date: Oct 2009 Location: Canada, BC Posts: 837	ive only owned one mk3 and guess what, you got it i blew the hg on my na with nohtin but headers... thanks to color dyes i found it easily right away! __________________ 1984 supra - 1uzfe - w58 - 4.10 - 1 piece aluminum shaft.

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