Ok... I am confused like nothing else... I had an overheat and turns out my t-stat died. I replaced it with a Mazda t-stat straight from the dealership with new gasket. Everything was cool... now temp is up again. I need to make sure of a couple of things...



1. Is 5w30 ok for cali right now with temps being between 80 and 90 degrees...



2. What coolant mix is recommended for a 13b 2+2???



3. If these are ok... how do I preform a presure test???





Help!!! I miss my car!!!

 

You sure it was the t-stat and not the guage? Those sending units are not all that reliable. Is it actually boiling over when you show a high temp?



To perform a pressure check you need a coolant system pressure checker, goes on the radiator, you pump it up see if the guage leaks down.

 

Oh yeah... I was on the side of the road with my car smoking white smoke. It was indefinitely the t-stat. And right now I have 100% coolant in my radiator. Am I wrong for not having mix? And is 5w30 ok for an engine with almost 200k miles?

 

No it should be fine with 100% bad news is rotary's really dislike overheating, you may have fucked something up.

 

is your fan working properly? are you sure that you bled all the air out of the system when u flushed it?

 

100% coolant is good??? I thought it was supposed to be 50/50, or more water than coolant for hotter seasons/climates.

 

Well... yeah... this is the only time I have ever heard that you SHOULD put 100% coolant. And BTW... is the temp gauge being at 1/2 durring hot temps???

 

coolant should be at least 50/50 if not 70water and 30 coolant in the summer, water cools better than antifreeze.



5-30 is a little light, but should be ok

 

I didn't say it was GOOD, I just said it should be fine. I've never heard a 100% anti freeze mix overheating a car, but then I've never ran anything over 50/50



EDIT: Hmm well I guess I was wrong, it could I guess overheat your engine, water absorbs almost 2 times the amount of heat as glycol, so i'd start there, although I don't know that it matters overheating a 200k plus rotary can't end in happiness

 

ok here is another question... how about what TYPE of coolant... should I just stick with Prestone Green??? Or should I switch to something else?!? I was told by a guy at napa that I was recommended to use a coolant with dexcool. So I am confused...