Hi All,

We have a vehicle in our shop with a Cummins 3.9L 4BT engine (it is installed in a Toyota Landcruiser!) It had a medium sized oil leak from the oil filter adapter plate to oil cooler. We disassembled and replaced the two gaskets with OE Cummins parts. Now there is a coolant leak between the oil cooler and the block. So we took it apart and did it a second time, same problem. Cooler plate is flat and straight. Any advice? Goop it up with RTV does not seem like a good idea.

Thanks

Gary

Gary Siegel
Owner
San Francisco Auto Repair Center Inc.
San Francisco, California, USA