Moving on from my7 blade fan to no thermostat??

[pedal2themetal]

HI,
Well running without a thermostat cause it to run hot especially in traffic? Its not boiling over now but getting purity hot

 

[pnora]

It could especially without a shroud.

 

[Don Frelier]

I ran mine briefly without a thermostat when I was getting the rust out of the block.
It ran pretty cold maybe 150? but I didn't drive it in traffic.
Is your radiator any good?

 

[WileE]

A thermostat is there for a reason. Not a good idea to run without one.

 

[oldbee]

If everything else is up to snuff, 150* is about it. You’ve got problems somewhere else.

 

[b-body-bob]

I had a never ending overheating problem until I looked up the PN on the fan and found it only had an inch of pitch and was for a slant-6. It had 7 blades which it turns out means little to nothing about how good the fan works.

I changed to a 2-1/2" pitch fan and now it will blow a hat off your head and runs right around the thermostat temp (185) after it's warmed up.

It's worth looking into. More pitch is more better.

The flat /6 fan was a 200, the one I use now is a 215 or 216. The parts book lists the pitch on the factory fans so you get the best one.

 

[pedal2themetal]

HI,
I think I know what I did... to make it look nice I painted the radiator and I think that's got it plugged up.. and not moving air..
Is there a way to clean it off/out like maybe brake fluid (I know that eats paint)? and hose it off with low pressure as to not bend up the vanes.

 

[Demonic]

More likely the inside is clogged. The exterior can be cleaned with Spray 9, Fantastic or similar products. If removing the thermostat actually helps, it is a sign the radiator is clogged. Never run with no thermostat, as running too cold can be a problem. Use a real high flow, like a stock factory one from the early 70's or an EMP/Stewart from Summit.