Boat Repair/Volvo Penta 3.0 GL 4 cyl 135 hp
David wrote at 2014-08-03 04:48:23
I have problem like this one and it was head gasket. It can be valve. Mine is head gasket. 3 of them has low pressure which they have 35 psi and one is 135. My friend remove head cover and gasket was damaged, so told him to do all of new gasket, head gasket, and valve. It run very good. Friend suggest me to get all new gasket to last longer.