Re: Ken's 1937 120 Touring Sedan

Posted by Ken_P On 2020/7/7 10:53:31

Well, it wasn't the easy fix. Thermostat looked fine, although surprisingly gunky considering all the work I did about a year ago to clean out the engine and radiator.

Did a quick test drive with the thermostat removed - no change, so that tells me the thermostat is functioning fine and I have a heat removal capacity issue - either a blockage, or the engine is making too much heat. The temp drop on the radiator seems to be a uniform 30 degrees, right to left. Block temps were 195 to 215 - so far too hot.

The only thing that has changed since I started having an overheating problem was replacing the manifolds. I'll check the heat riser again, and inspect the plugs. Replacing the intake manifold fixed my rich running, so I'm wondering if it is maybe a little lean now. I'll report back once I find the problem.