Recent content by Milkman

Ok thank y’all for the help and link to that article!

Ah, ok. This was the gasket that was on it.

I was looking at the head after removing intake gasket and looks like some pitting around the coolant port. Is this normal or a big issue?

Ok, thanks.

The plate on the bottom of the intake manifold has a small gap. Would this cause any issues?

I will remove the other head in the next couple of days and get the oil drained and let you guys know what I find, thanks for the help.

Ok, I do believe I will take your advice and just plan on breaking it all down and taking it to the machine shop. Say it does not hone out. How big can you safely bore out a 340?

No, I appreciate all of yall taking the time to come up with ideas and suggestions. The casting number on the heads looks to be 3418915C it also has the letters AAWJ and 360. The pistons are L2316 .030 over. Another thing I noticed when tearing it down yesterday was that the distributor was...

Here are a few more pictures. I’ve noticed number 4 cylinder has some minor pitting, from what I assume is coolant sitting in there?

It has a cast iron intake, would anything be visible to the eye? There is no sludge in the lifter valley but you can see a small amount of coolant in there.

The motor was running normal temp. It seemed to run ok until it warmed up, then it began to misfire badly and had no power. It also sounded different as if it was only running on 4 cylinders. It also would die at idle. There was not any smoke coming from exhaust.

I pulled that side first because I would hear a hissing sound coming from the area of that head and it would last about 10 seconds after the motor was shut off. I appreciate everyone’s help and suggestions.

Intake gasket looks good. There is also milky white substance on the inside of the valve cover.