Most any gasket u find is gonna be sized to 87mm(ie a .020/.5mm overbore)

 

Fast Freddie is your 4g64 oringed?

 

Nope... put new resurfaced head on and put in some 625 headstuds... didnt retorque them and popped the radiator... retorqued them (a few needed turned 1/4 turn) and burped system again and havent had any issues...

 

How much power and PSI?

 

How much power and PSI and did you prep the block too?

 

Power around 550 at 33psi... block was cleaned but not resurfaced, the head was decked and cleaned before install, using a cosworth head gasket... like I said, my mistake for not retorquing the studs...

 

happened to me too....it was headlift!!! i ended up replacing hg and upgraded to L19s and problem stopped......my head was warped also so got it milled......simple

 

I run a 4g64 mivec that is destroked and 87mm. I used a Cosworth hg and map L19 head studs. Never used coolant. I retorqued the head studs, but they hadn't moved.

Considering doing an o ringed setup this go around

 

Bringing this back.

If you're going with 0.020" over to 87mm on the 4G64 and have a chamfer on the cylinders, does the gasket need to match the chamfered surface or the 87mm of the cylinder bore.

I notice the stock head gasket is wider than the cylinder bore and matches the cylinder chamfer which i assume is done to prevent having the head gasket poke out and create a hot spot or prevent carbon collecting underneath.