Quote:
Originally Posted by s13mikesr20
Outer headgasket is muffed up recommend radiator pressure text and leak down test
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DO NOT remove the thermostat .... The dam SR20 pumps flow crazy volume... The Thermostat acts as a restriction .. You take it out and for sure it will over heat .... The water passes the core quick enough it can't cool.. A larger radiator will help put at least cut out the spring and maybe the diaphragm if its truly stuck but water volume needs to be slowed down ...
Also bubbles could be that the water is boiling in the block or head .. This too is very bad if air gets stuck in the block as it will create hot spots and I have seen engines lost to this as well ...
I recommend running Evans NRG+ if you can afford it.. It will not boil tell 375* and it doesn't expand .. You can also run a ZERO or LOW pressure cap and it will be easier on all your coolant lines as well ..
1. Replace TSTAT
2. Evans NRG+
Coolants ยป Engine Cooling Systems
3. Optional - Low or Zero pressure cap ..
Hope that helps ..