Overheating

[Protege5 Smoke]

Busted the radiator today. Small leak, plugged it with stop leak, but it's still overheating. My guess is the thermostat broke? Getting a metallic rattling sound as well, not sure where from, more apparent during acceleration. Thoughts?

 

[MrGiggles]

I replied to your build thread a minute ago.

The rattling could be preignition, which is worsened by a hot engine.

 

[Protege5 Smoke]

Question about thermostats. Anyone use/have one of these?
http://www.mishimoto.com/mazda-protege-racing-thermostat-99-03.html?gclid=CMSLibn1q8QCFYc7aQodi44AlQ
Just wondering if I should get anything better than the generic Duralast $9 thermostat from autozone..

 

[The_big_dill]

Overheating + rattling? Could it be water pump impellers that are broken?

 

[Protege5 Smoke]

I think I'm going to be replacing both the thermostat and water pump, just for good measure. Just wondering if it's worth getting the Mishimoto radiator, I'd have to buy the transmission oil cooler as well since that's separate for the automatics