Quote:
Originally Posted by LGAFF
I think its other than a head gasket, we have seen the IH cause the same issue...
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I agree.
I betcha one of the IH gaskets is more likely the issue (fingers crossed for you). The gasket is very thin between the coolant and 4 of the cylinders.
Note the coolant port between the 2-4 runners (in this case).
If you find either plugs 2 or 4, or plugs 1 or 3 "steam cleaned"...I'd say you have a 90% chance of just an IH gasket. That being the case, you can pressurize the system at the surge tank, and observe the pressure drop a bit, and then release the pressure and pull the plenum.
Here's what I and others have discovered when steam appears in the exhaust. Note the left side primary runner of the #3 cylinder and you can just make out the black color of the gasket, just squirting out into the runner on the left edge of the runner: and, the coolant is unmistakable too.
This being the case, Jerry's Gaskets is the solution to that.
If however you have a steam cleaned plugs other than 1-3 or 2-4, then things are a bit more grave... Let's get this far before some pushrod mechanic tears into your LT5
P.