Is It a big Hex head or little?

 

A little recessed one. Just put your hand down there and you will feal it.

 

possible new product??????????

I decided to make a water temperature manifold for my 79 rx7. i bought a guage and it had 1/2 " NPT threads for the mechanical sender. i did not want to mess with what was there or try to drill out and tap the hole for it, there is not much materail to work with in some of the places and if you mess up your screwed. so i took aluminum and i started machining different easy to install universal sender manifolds, that can be placed in two places. im working with a guy trying to start making theses parts so i dont want to say to much but if any one would be interested in a universal easy temp install, if you would reply via emial. im trying to get a fill for how many people would use a product like that, before i start producing them. thanks robs_seven@yahoo.com

 

Heres the other pic I have for the location I used.

 

ok cool.....ima see if i can find it tommorrow. im not terribly concerned....as it runs great, is holding oil pressure fine....but i would like to know.

 

Over years, I accummulated many parts. So to see which is better, in my old REPU, I put a "T" behind the water pump housing and installed a non-sealed Sunpro vs sealed autometer. I noticed that the Sunpro ran hotter especially on uphills and stop & go traffic. Covered the Sunpro's T-coupler with plastic wireloom, the gauge ran pretty much in line with autometer.

So far, I found 2 cheap but good gauges. The cheap summit-brand gauge (ugly but works fine) and the Equus (someone posted it before and I tried it). In fact, I just picked up a new set of triple-gauge Equus wtih chromed bezel (sp?) for a $42. This is going to my new FB.