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I wonder if some coolant flush or other aromatic solvent/oil that got into the cooling system caused that to fail - it looks decidedly swollen, as if it had been soaked in gasoline.
Dave
Originally Posted by Speed of light
Dave,
That's a good observation. ... Additionally, the motor was running (@104k+ miles) but pulled due to a coolant seal failure, ...Joe
Maybe the combustion gasses along with some engine oil got into the cooling system when the coolant seal failed? I know there is some black crud in my overflow tank that looks a lot like oil (But, I don't have a coolant seal problem that I know of).
My fans are hooked up directly @ the moment and they help alot when i cruise around(88*- 90*) but the moment i step on the highway my temps go up to 96* and even then, when i slow down and cruise on the highway it still remains @ 96*.
I have a koyo radiator, FMIC and i'm also single turbo(400hp) and also have a apexi AST and i also use texaco coolant. I was wondering if i remove the thermo, if it would help out a bit. thank you
Yeah I'd like to know where we stand on this nowadays.
I'm looking to replace my thermostat around Christmas 2016 as preventative maintenance (when I'm scheduled to do my next coolant flush) so I'm researching thermostats now.
I believe my current thermostat (which is working fine) is the original 1992 thermostat still in there.
Mazda/Billion/Sard/Stant, whats the current consensus?
I just received a 89~95 Tstat from rx7.com and it doesn't have the rubber like dales dose . so those are OEM the one, i got is aftermarket?
8AF6151719U
i tested in boiling water and it dosent crack open untill like 183F, and very slowly opens up. at 180F it looks to still be shut . and it opens slowly .didnt get hot enough to see it fully open, and i used a crappy walmart meat thermometer
I recently had a year old Mazda thermostat fail on me. Luckily I caught it before the motor overheated. I think the problem is a lof of these parts are new old stock, so they could have been sitting on a shelf or in some warehouse for 2 decades.
A front mount in itself will not cause an rx7 to overheat. I set up plenty of cars that see track time with no issues with a front mount. The key is a robust radiator, and adequate ducting to it. That being said, a v mount is still the best option.
