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what head gasket for tb42 turbo
Posted: Tue Mar 23, 2010 5:40 pm
by rob_rover
whats the best head gasket to use for tb42 turbo engine?
and where to get one from in melbourne?
Posted: Tue Mar 23, 2010 7:07 pm
by hiy6o
I'm using Genuine Nissan with new head bolts , running 13 psi no probs
Posted: Tue Mar 23, 2010 8:17 pm
by PGS 4WD
Depends on the level of boost. Biggest problem is soft heads, the alloy hardness deteriorates due to the heating and cooling over time. A rockwell hardness test on numerous locations of the surface needs to pass at least 85 Rockwell(bare minimum for NA), and ideally over 100 Rockwell is better(new is around 130.
Stock headgaskets that have a graphite coating are excellent as are multi layer steel shim as used on the 4.5.
Joel