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Old 09-27-2006, 09:50 PM   #1
rayk5799
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Default 1989 Supra blown head gasket

Please help if you have any idea what this might be. About 2 years ago, I replaced the head gasket with original Toyota components. About a week ago, the car started to pour out white steam from the tail pipe, but never really overheating. Well, I assumed it was the head gasket again so I took it apart and sent the head for resurfacing and pressure testing. Purchased new toyota OEM head gasket and OEM head bolts.
Put everything together and it poured out white steam from the exhaust again!!!!!!!!!!!!!!

S_it, I am sooooo pissssssed offffffff. I can only guess it might be that the block is cracked. I checked the block surface for flatness and it check out okay.

Anyone have any suggestions????

Thanks.
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Old 09-28-2006, 05:31 AM   #2
Metalshredder_25
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Don't buy a oem headgasket,get yourself a nice thick metal headgasket from suprastore.com and some arp head studs.It will probably cost a bit more but you can drive like a maniac and never worry about a bhg ever again.
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Old 09-28-2006, 05:55 AM   #3
mrnickleye
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Wink OEM should be fine

Don't use a metal head gasket unless you resurface the block, anlong with the head. This means a complete overhaul, as the block needs to go to the machine shop too.

I'm using OEM gasket for 1 1/2 years now, with no issues. And I push it damn hard, a lot.

You must have something else wrong. The block may be the problem, since the steam returned right away.

Did you torque the bolts to 72 lb ft ??

Did you look REALLY closely at the gasket and head and block to find any sign of where the gasket may have blown??

Mine, as so many others have experienced, was a tiny spot next to #6 cylinder. Also, the area on the block had a tiny place that was eaten away from the coolant/heat.

An ISHINO (OEM) gasket is WAY more forgiving (seals better) for surfaces that have not been resurfaced to a very fine RA factor.

check this info out:

http://www.aa1car.com/library/2003/eb30320.htm
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Old 09-28-2006, 07:07 PM   #4
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Quote:
Originally Posted by mrnickleye
Don't use a metal head gasket unless you resurface the block, anlong with the head. This means a complete overhaul, as the block needs to go to the machine shop too.

I'm using OEM gasket for 1 1/2 years now, with no issues. And I push it damn hard, a lot.

You must have something else wrong. The block may be the problem, since the steam returned right away.

Did you torque the bolts to 72 lb ft ??

Did you look REALLY closely at the gasket and head and block to find any sign of where the gasket may have blown??

Mine, as so many others have experienced, was a tiny spot next to #6 cylinder. Also, the area on the block had a tiny place that was eaten away from the coolant/heat.

An ISHINO (OEM) gasket is WAY more forgiving (seals better) for surfaces that have not been resurfaced to a very fine RA factor.

check this info out:

http://www.aa1car.com/library/2003/eb30320.htm

Thanks for your info and I also thinks it the block but was hoping someone else had a suggestion. Do you thinks its worthwhile to try to replace with a Ishino gasket?? I check the block surface but didn't notice any real corrosion.

DO you think that me sanding the block surface with 400 grit sand paper had anything to do with it??
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Old 09-29-2006, 02:39 AM   #5
mrnickleye
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Well, when you sand metal you need to use a flat block to keep the paper flat. If you use your finger, you create small depressions in the surface.

Did they mill the head to true it up??

google 'supra ishino head gasket set'.
You'll get many sites that sell them, free 2 day shipping. approx $150 for the whole set. Ishino was factory OEM, but the new sets are improved sealing than original.

You need to borrow a mechanics straight edge to check the block for flatness (per TSRM).
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Old 05-18-2009, 03:56 AM   #6
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Quote:
Originally Posted by mrnickleye View Post
Don't use a metal head gasket unless you resurface the block, anlong with the head. This means a complete overhaul, as the block needs to go to the machine shop too.

I'm using OEM gasket for 1 1/2 years now, with no issues. And I push it damn hard, a lot.

You must have something else wrong. The block may be the problem, since the steam returned right away.

Did you torque the bolts to 72 lb ft ??

Did you look REALLY closely at the gasket and head and block to find any sign of where the gasket may have blown??

Mine, as so many others have experienced, was a tiny spot next to #6 cylinder. Also, the area on the block had a tiny place that was eaten away from the coolant/heat.

An ISHINO (OEM) gasket is WAY more forgiving (seals better) for surfaces that have not been resurfaced to a very fine RA factor.

check this info out:

http://www.aa1car.com/library/2003/eb30320.htm
do you have to torque it down to 72? the haynes book says its 58.
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Old 05-18-2009, 11:51 AM   #7
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58 is why 99% of 7m's have blown their gaskets. undertorqued from factory with no recall. trust me, im doing my BHG as we speak. torque em!!!
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