1987 turbo, Need help diagnosing!!!

supradaddy0803 · 02-02-2010, 10:09 PM

How much work did you do to the mating surfaces before you put it back together? I would have measured for warpage on the head and the block with a gauge. Also if the head wasnt torqued properly in stages like it should be then there is another issue. Also did whoever did it use the old head bolts? You know those have to be replaced. If it were me (and with a 1JZ I dont run into the BHG problem like you do) I would take the whole engine out take it to a machine shop and have it tested for cracks first thing. Cre was trying to tell you what you already found. Have the surfaces checked for warps then if everything checks good install ARP studs and a new HG. From every 7M owner I know they Smack you if you didnt invest in them.

cre · 02-03-2010, 06:37 AM

Quote:

Originally Posted by supradaddy0803

Also did whoever did it use the old head bolts? You know those have to be replaced.

No, actually they don't. They need to be inspected, but they are not torque to yield bolts and may be reused.

02-02-2010, 10:09 PM	#1
supradaddy0803 12psi boost Join Date: May 2006 Location: Athens, TX Posts: 308	How much work did you do to the mating surfaces before you put it back together? I would have measured for warpage on the head and the block with a gauge. Also if the head wasnt torqued properly in stages like it should be then there is another issue. Also did whoever did it use the old head bolts? You know those have to be replaced. If it were me (and with a 1JZ I dont run into the BHG problem like you do) I would take the whole engine out take it to a machine shop and have it tested for cracks first thing. Cre was trying to tell you what you already found. Have the surfaces checked for warps then if everything checks good install ARP studs and a new HG. From every 7M owner I know they Smack you if you didnt invest in them. __________________ 1987 supra NA 5 speed 1JZGTE swap Tokico Illumina 2 and Eibach springs Tokico pillow blocks Suspension Techniques front and rear sway bar HKS super dragger cat-back exhaust plus test pipe Greddy Profec B spec 2 boost controller HKS type 1 turbo timer Supra sport solid steel drive shaft Walboro 255 fuel pump JZA70 Front end mod 18" Volk Racing AV3 18x8.5 front 18x9.5 rear

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