I had some autometer gauges installed and so i have a pretty accurate reading for my temp in the engine. WHen I go up hills now I find it is climbing to 225 and when I am downhill it goes down to 195 but for most driving it is around 210. It has gotten higher averages over the summer.

Any ideas?

1987 rx7 NA, 120,000 miles, new dynomax complete exhaust, orig radiator.

Rad?
Water pump?
Thermostat?

Hmm

 

change the thermostat and coolant. that is higher then it should be, but not in damage area yet. thats at around 240.

downhill should be 185

 

That is why i am concerned.
I will try the thermostat first.

 

Change the thermostat with an OEM one and see if you can get any bubbles that might be in the cooling system out. Check your fan clutch. Have you noticed any leaks or loss of coolant at all? If the water pump goes bad it lets you know by "weaping" out the front of it. With the original radiator I would look into replacing that whether its the problem or not.

 

just a reminder, or if you dont already know...only get the actual Mazda factory T-stat. theyre the only ones that work right, one thing the dealer is good for.

 

I do get a bit of oil on the floor but not enough to be concerned.

i will change the thermostat and let you know...
It is not warm up here in Vancouver, BC compared to other areas.. 70-75 degrees during the summer here.

 

replaced rad with copper one.. runs at 183degrees all day now..