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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 

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

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

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

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Posted (edited)

Then i guess you have to follow the water.

Edited by dripley

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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.

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

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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.

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

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