Coolant System Mysteriously Pressurizing

[Ronbo]

Not really unusual to get a little oil deposits on the back cylinder plugs. The valve guides pull a little and the back cylinders valve train is submurged because of oil being forced to the back of the valve covers.

[Doug I]

yup sure would

[Ron61]

Dan,

Here are a couple of your pictures that may help the guys get an idea of what your plugs look like. The first two you have numbered as # 8 and # 4. Glad that you have narrowed it down as this will help anyone else that may run into this in the future. Not the normal type problem.





Ron

[Buzz]

How are pictures of his plugs related to this problem and the solution he found??? What am I missing?

And I have to agree that if the pressure buildup is the result of gasses liberated from a galvanic corrosion or electro-chemical reaction, then the introduction of a sacrificial anode would likely produce even more gas or at least produce the same amount faster.

[patrickt]

Originally Posted by Buzz

How are pictures of his plugs related to this problem and the solution he found??? What am I missing?

They're not related; you missed nothing. The plugs were simply an interesting sidebar that was totally unrelated to the real issue at hand.

[Buzz]

Ah so.