Home › Forum › Ask A Member › Leaking crankcase leads to overheat condition? › Re: Leaking crankcase leads to overheat condition?
I pulled the cylinder head and it looks very clean, same thing with the water jacket around the cylinders. I suppose I could pull the exhaust side to make sure there’s no clog there, but given the fact that the cylinder head isn’t getting hot, but the cylinders are, that is what makes me lean toward the ‘lean fuel-air’ condition.
I was consulting a champion spark plug guide (not saying this is the bible or anything), and it listed air leak at the manifold as a culprit. All the other explanations were things I knew I have gone through already. I’ll pull the exhaust cover because I’m reassembling everything right now so it’s easy. Was getting ready to remount the powerhead after resealing the crankcase – that thing was clearly leaking gas/oil out of it after I split it in half.
If this doesn’t solve the problem and I don’t find anything on the exhaust side, I am thinking maybe it IS running lean at the carb setting. I’ll double check my link n sync job, but I’m pretty sure both are OK. First motor I’ve seen do this, particularly these early 70’s ones which run rich usually, anyway.