Posted March 13, 20187 yr I have a 97 12 valve got home from work with coolant all over the a arm and coolant is foamy is it the thermostat housing leaking
March 13, 20187 yr Author Hard to tell where exactly it’s coming from truck doesn’t over heat or smoke doesn’t have power loss either
March 13, 20187 yr Owner 10 hours ago, 975speed said: is it the thermostat housing leaking Cummins only uses a rubber o-ring for sealing the thermostat. There is the little bypass hose on top there double check it. Check for cracks in the block and if you have a 53 block which are known to crack on the passenger side. There is the heater hose on the passenger side that might be leaking too.
March 13, 20187 yr Author Wherever it’s leaking from its covered the the front passenger suspension with antifreeze in 30 minutes
March 13, 20187 yr Owner The easiest way to chase leaks is on a cold dry engine. Pump up the coolant system with 16-18 PSI of pressure and watch for the coolant to flow. Flow the coolant trail back ot the source of the leak.
March 13, 20187 yr Author Ok cause as soon as I started it this morning I could see a little seepage from either thermostat or head
I have a 97 12 valve got home from work with coolant all over the a arm and coolant is foamy is it the thermostat housing leaking