idle problems

88 supra turbo · 05-07-2009, 04:15 AM

I run synthetic oil in my car and I check it regular and no signs of milky oil. I will check the coolant lines and I will recheck my isc valve. The guy I bought the car off of sayed he rebuilt the motor and had put studs in place for the head. He told me about the notorious hg problem with the supras. I would like to rule out the hg being bad but you never know. Any help would be great. When it idles at 800 rpm the water is bad inside the exhaust but at 1000 rpm idling it dries up and does not smoke.

frostburn · 03-11-2010, 07:33 PM

im sorry to be the one to tell you this... but that happened to me aswell... and it was right after doing a 3 layer MHG job on the car i did it all myself brought the block and head to be surfaced and all that good stuff and when the car was all together it started doing that so i drobve it for a few months and that just made it worse... i brought it to my machanic and he took a look at it and it turns out the pressure from the first start cracked my MHG and caused all of that bs your going through. SORRY AND GOOD LUCK!!

Caleb · 03-13-2010, 03:43 AM

the only water is getting into your exhaust if from the head. anywhere else it would have evaporated before it got out. i'm afraid the last guy is right. it's likely not a bhg because of the head studs, so it must be a crack somewhere. not a good thing unfortunately...sorry man

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05-07-2009, 04:15 AM	#1
88 supra turbo Stock Join Date: Apr 2009 Location: va Posts: 14	I run synthetic oil in my car and I check it regular and no signs of milky oil. I will check the coolant lines and I will recheck my isc valve. The guy I bought the car off of sayed he rebuilt the motor and had put studs in place for the head. He told me about the notorious hg problem with the supras. I would like to rule out the hg being bad but you never know. Any help would be great. When it idles at 800 rpm the water is bad inside the exhaust but at 1000 rpm idling it dries up and does not smoke.

03-11-2010, 07:33 PM	#2
frostburn 3" Exhaust Join Date: Jun 2006 Location: ontario CA Posts: 128	im sorry to be the one to tell you this... but that happened to me aswell... and it was right after doing a 3 layer MHG job on the car i did it all myself brought the block and head to be surfaced and all that good stuff and when the car was all together it started doing that so i drobve it for a few months and that just made it worse... i brought it to my machanic and he took a look at it and it turns out the pressure from the first start cracked my MHG and caused all of that bs your going through. SORRY AND GOOD LUCK!!

03-13-2010, 03:43 AM	#3
Caleb Stock Join Date: Mar 2010 Location: Surprise, AZ Posts: 4	the only water is getting into your exhaust if from the head. anywhere else it would have evaporated before it got out. i'm afraid the last guy is right. it's likely not a bhg because of the head studs, so it must be a crack somewhere. not a good thing unfortunately...sorry man