Alfa Romeo Bulletin Board & Forums - View Single Post - Car running hot ó is it the Evans coolant?
View Single Post
post #1 of (permalink) Old 06-03-2019, 12:18 PM Thread Starter
Canadian Spider
Registered User
Join Date: Jun 2017
Location: Toronto, Canada
Posts: 135
Car running hot ó is it the Evans coolant?

My car has been running hot since I put the new head on it this past winter, and Iíve been having a lot of trouble finding the source because I changed so many variables at once. New head, rebuilt carbs, new thermostat, new coolant hoses, new coolant type. I reused my old rad because it seemed to flow water just fine and always kept the car at a solid 185F prior, regardless of weather or conditions. The rad cap is new.

Now the car runs closer to 200-212F, as indicated by both the coolant gauge and my infrared temp sensor (they match!). And the temp fluctuates +/- 10F during a drive, which it never used to do. Road speed and engine speed seem irrelevant to the temps.

After the new cylinder head went on, I filled the engine with Evans Waterless Coolant. It occurs to me that thatís another critical variable that could affect running temperature.

Iíve already spent about $200 to fill the motor up with this stuff twice (donít ask). Iím gonna swap it for Prestone this evening unless someone has a better idea and see if the temps come back down.

Besides the Evans coolant, the only thing left I can think of is that thereís something not right with the new thermostat I got from Centerline. That seems unlikely. I tested it in boiling water to see that it works, but I didnít check at what temp it opens.

Iím pretty confident Iíve bled the system well.

I know some will say that 210F is no big deal, but this same motor used to never deviate from 185F, so I know somethingís not right. Iíll report back, but Iím open to any suggestions!

1976 Spider
Canadian Spider is offline  
For the best viewing experience please update your browser to Google Chrome