Fhead Overheating

It's almost flush. I'll go recheck the belt. I used the old belt to size the new one.

.......and at $133 for a radiator, it can't hurt to try it.

 

I assume this is a vacuum pump? So a theoretical maximum of 15psi Delta-P - not much of an increase over normal combustion chamber pressures. I still think it is maybe possible you have a tiny leak that only shows when the engine is working hard. I've experienced that with a plow truck that would "overheat" only when pushing snow.

A true thermally induced overheating problem, I would expect to result in boiling over, which you say doesn't happen.

 

Correct. It doesn't boil over. I bought a new radiator. If it doesn't fix the issue then I'll try a fan shroud and if that doesn't work I guess I'll retire the current engine.

Most of these testers have a simple bulb like a turkey baster and not a vacuum pump.

 

Forgive me, but if it doesn't boil why is this a problem?

Consider that a 160ºF thermostat is sitting up front in the cool air. The temperature sender is at a hotter part of the block.

 

Well, the gauge hit 230 at one point and that isn't normal....

Every one of the fhead powered jeeps I have owned had overheating issues.

 

I can't find a number or anything on it.

 

Okay. But I still don't understand why it doesn't boil.

I know you said you checked against another gauge, but as little as a loose or dirty connector will give false readings.

 

Mechanical temp gauge and I checked it with another mechanical gauge. The belt is 1/2".

The temp was around 200* when I checked the gauges against one another. I also checked again around 170*.

 

correct. It didn't have one at all so I drilled out the pipe plug and installed the correct pipe fittings and bypass hose.

 

I just looked and my alternator pulley is for a 1/2" belt.

 

I need a dual belt pulley to run my power steering.

 

We all have our own private little hells to burn in...