slow heating

[njsteve]

First things first, do you actually have a problem:

You indicate that it will slowly heat up: what temp does it heat up to? Do you have a real mechanical gauge or an infrared heat gun to check the actual temp? Never trust the factory electrical gauge.

Remember, some of those so-called NOS temp sending units are way off when it comes to accuracy. Most aftermarket ones are crap, too.

I had one supposed resto sending unit that made the gauge read 220 when the car was at 160 - on my 72 T/A. Don't even get me started on the Chrysler combination temp gauge and voltmeter that moves up with the rpms and falls when you let off the gas. [img]<<GRAEMLIN_URL>>/rolleyes.gif[/img]

A vintage sender is the best bet for accuracy. Second best was the Wells TU5.

Here's some info when I tested a few senders:

http://forums.performanceyears.com/f...070&amp;page=2

[COPO 70 RS/Z28]

It's mech guage, I was originally running a 195 and the guage would show 195 to 200 while driving, with the 180 stat the guage shows around 185 running. It was not guaged before and the sender must have been bad because it bulged the tanks (harrison) end of last year. I was able to save the tanks with the recore.