Strange there seemed to be a lot of broken cylinder heads and dropped valves in the late eighties and early nineties.
Could have been a bad batch out there.
Is it less common these days?
Now seeing use of multigrade oils and seeing some high oil temp's and low oil pressures during normal ops.
Not sure if these oils have the capacity to take away the heat efficiently or perhaps flowing through the cooler too quick to be cooled?
When hot these oils have the consistency of water.
Last edited by BigEndBob; 8th Jun 2015 at 07:17.