Operating temp of Cragar OHV head
 

I recently installed a new modern 10-fin per inch core radiator in my Model A. It has a vintage Cragar OHV head on a Model B block. With my old clogged up and leaky radiator, readings from my hand-held laser thermometer read 230 degrees right on the Cragar head adjacent to cylinder #4 (the hottest point on the engine :mad:).

What should be the highest temp reading on the Cragar at normal operating temp (not via a temp sender on the outflow or of the radiator coolant)? :confused:

I am looking for the normal reading taken at the hottest point on the overhead valve head itself closest to the firing chamber. I am NOT looking for the normal operating temperature of a stock Model A :D.

Anyone know OHV conversions well? Maybe Jim Brierley?

Re: Operating temp of Cragar OHV head
 

BRENT in 10-uh-C probably knows. You could PM him if you don't get an answer here.

Re: Operating temp of Cragar OHV head
 

Mine Actually runs cold without the thermostat I use a standard radiator
never checked with temp gun but can put my hand on any part of the head feels the same front to back
check you thermostat it located in the water pump neck and held with a circlip

Re: Operating temp of Cragar OHV head
 

Jim should know....

Re: Operating temp of Cragar OHV head
 

Mine runs about 160 - 180.

Re: Operating temp of Cragar OHV head
 

At the head itself? or read from the coolant outflow sensor?

Re: Operating temp of Cragar OHV head
 

HAMB

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