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.
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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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