Is synthetic compressor oil the problem?
I have an older model Campbell Hausfeld Model vt61230 I bought new back in the late 80's.
A couple of weeks ago I changed the compressor oil and switched to synthetic oil instead of non-detergent. Everything was working fine and then and then a couple of days later the air compressor wouldn't turn on.
I took the motor to the repair shop and they reset it. Upon re-installation the motor worked, but the belt squealed as though it was meeting with resistance, but it did turn the belt.
Now, when trying to pressure up, air comes out of the vent tube located at the back of the cylinder, and continues until it bleeds completely down.
Looking at the other posts, it seems that I might have an issue with valve or piston not seating.
My questions would be could the synthetic oil cause this and the approximate cost of repairs and if it would be worthwhile.