2003 Ford F350 - 7.3L Oil In Coolant

[nickscarcare]

I have a customer who has oil in his coolant, it swelled up the seal on the degas bottle, and the bottle is deformed a bit too, can not get a new cap on. Is it most likely on these that it is the head gaskets? Or if not what else do I look for on these?

[Tim Martin]

I doubt it is the head gasket. More likely the oil cooler on the left side of the block. They were known issues.

[liljoe]

I seen injector cups in the heads do this too.

[Tim Martin]

I seen injector cups in the heads do this too.

Well yea, I guess they could do it also. Do you know of a good way to tell which it would be? Oil cooler or injector cup? And, how would you determine which cup it is? Or would you do them all?

[liljoe]

If it is a cup, you usually can see it on the scanner with the per/del PID.. Test oil cooler off engine with air pressure. I generally do all 8 cups at one time, of course most of my 7.3s are ambulances so they do not need any breakdowns and if one is bad the others are prob not far behind.

[steven kiser]

Oil in coolant and no coolant in oil is most likely the oil cooler. A rare and i mean rare is the turbo but there are usually other issues.

[nickscarcare]

So I basically have to get the cooler out then pressurize it to make sure then. What do you look for in the scanner pid to see that it is a cup leaking?