06-30-2008, 10:48 AM
Join Date: May 2007
Total Cats: 0
Originally Posted by Braineack
I wouldn't bother....this is trivial and not the source of the issue.
only a few things would cause overheating:
- stuck closed thermostat.
->replaced - this is opening (have good pressure on top hose and it's nice and hot)
- leak. If the system cannot maintain pressure, it lowers the boiling point of the water.
->still very possible - will look into this
- Too much cap...If you have something like an 18psi cap on it, i can almost promise it's going to leak.
->16psi cap on for now, I also have a 13psi new cap (I can run the lower cap also to be on the safe side).
- Air pockets. Was the system burped properly? You should idle the car without the cap from cold. Once the thermostat opens it will "burp" you can then squeeze the upper and lower hoses and try to remove all the air from the lines. Then you top it off and replace the cap and fill the resivour.
->forgot the burp (I normally do this, but I finished at midnight Sat and forgot, so will open the cap and burp it properly). Fyi: it started overheating b4 I opened the system but then again I suspect the old thermostat wasn't working so I could have fixed one prob when I replaced that and introduced another (I did tstat first last weekend and the pump etc this weekend).
- No Fans/Airflow.
-fans running properly, everything stacked close together and I don't have a ricer-big fmic mounted in a retarded way so airflow should be fine (although prob wouldn't hurt to insulate around things)
- Blown Headgasket.
->Yeah this is the one I'm hoping to avoid since you gota take soo much off to replace it.. I just spent a good day/night in the garage (w/o the beer this time = teh suck). I'm also not seeing any normal tell tail smoke but it could still be a hairline crack in the gasket... (fingers crossed it's not)
I wouldn't bother with the undertray in your case, the scooper does a good enough job of sealing off the bottom...with that size rad and the scooper, it shouldn't be overheating. I'd be looking for pinhole leaks on the small lines and bad "seals" on the hoses. Try running without a thermostat, rule that out. worse case scenario is a blown headgasket.
I did replace the tstat but I can def pull it out (was thinking to pickup a mazda tstat with the dual springs anyway) but will need to pickup a new gasket to do this test first. And yeah will keep an eye on the hoses and replace any that look cracked at the hose clamps (there's several tie-ins at the bottom hose area that are a bit on the cracked side now, will be cheap n easy to replace them (although messy :-P).