supra head gasket questions+ rebuild

Bill UK · 05-02-2008, 10:17 PM

The hole in the head is only a clearance hole, and should have no effect on compressing the gasket if the stud is over tightened. I think they suggest finger tight to allow for the stud to rotate slightly when tightening up the nut. Otherwise if the stud was screwed in firmly into the block and the stud rotated causing it to tightened up even more, the stud would be difficult to be removed using a small 5mm allen key. Using a mixture of old bolts and new studs doesn’t sound a good idea. Read this http://www.aa1car.com/library/2005/eb70536.htm
I know there's a lot or recommendation to use ARP studs, but there is also a lot of Supras that have had BHG repaired using stock Toyota head bolts.The set of APR studs you have don’t sound if they are for a 7M engine. As I said “this is the most critical part of the engine I wouldn’t take any chances”

05-02-2008, 10:17 PM	#79
Bill UK AEM EMS Join Date: Jul 2006 Location: UK Posts: 891	The hole in the head is only a clearance hole, and should have no effect on compressing the gasket if the stud is over tightened. I think they suggest finger tight to allow for the stud to rotate slightly when tightening up the nut. Otherwise if the stud was screwed in firmly into the block and the stud rotated causing it to tightened up even more, the stud would be difficult to be removed using a small 5mm allen key. Using a mixture of old bolts and new studs doesn’t sound a good idea. Read this http://www.aa1car.com/library/2005/eb70536.htm I know there's a lot or recommendation to use ARP studs, but there is also a lot of Supras that have had BHG repaired using stock Toyota head bolts.The set of APR studs you have don’t sound if they are for a 7M engine. As I said “this is the most critical part of the engine I wouldn’t take any chances”