Coolant leak

[975speed]

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 

[dripley]

If it is that noticeable on the a arm follow the trail up and see.

[975speed]

Hard to tell where exactly it’s coming from truck doesn’t over heat or smoke doesn’t have power loss either

[dripley]

The water should be steaming if straight out of the block and at temp.

[975speed]

Truck was maybe 150 when I got home and no steam

[dripley]

Then i guess you have to follow the water.

Edited March 13, 2018 by dripley

[Mopar1973Man]

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.

[975speed]

Wherever it’s leaking from its covered the the front passenger suspension with antifreeze in 30 minutes 

[Mopar1973Man]

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.

[975speed]

Ok cause as soon as I started it this morning I could see a little seepage from either thermostat or head

[975speed]

Could the hose between the head and thermostat be busted causing a leak