i Just installed a remanufactured 6.0 long block from Blackwater with fully Bullet Proof kit. All was well until i was letting it idle to warm up the head gasket on the left side started to leak. Has any1 had any dealings with these peeps, the gasket appears to be stock from the tab i see. Do the black Onixs gaskets look like stock ones?

 

Black onyx are black all over. The last shop I worked at used black water or j and k and they were coming with the onyx gaskets and claimed they never had any problems out of them. Id call them because you should have a warranty.

 

Thanks will do, these must be OEM. The leak only happens when the engine is running, i pressurized the cooling system to 16psi no leak until i fired it up. I hope is was a torquing issue and not a machining one.

 

Any updates?