Thermostat

[BigPelo]

I had 2 CEL P0128 since Friday (Coolant thermostat - coolant temperature below thermostat regulating temperature). I am starting to think my 170F thermostat is stock open. Engine took forever to warm up and I have very little heat form vents. Coolant level is back to recommended and I burp the system like 5 times.

Is there a way to verify the working condition of the T-stat without taking it out?

 

[ecoboostsho]

It sounds like yours is definitely stuck open...I have the lower temp thermostat and the tune and it warms right up and stays there...albeit 10 degree or so cooler than stock but the needle is definitely on the chart so to speak.

I believe you could let the car cool and then start it.  You shouldn't have any pressure in your radiator hose when the car is cold if the thermostat is closed...when it opens you should have flow and there should be some pressure in the hose.  It might be subtle but you should be able to tell.

 

[BigPelo]

Problem solve. The o-ring wasn't well sitted and coolant was leaking. That's why I was also re-filling coolant everyday without attaining recommended level.

Feel n00b.

 

[SHOdded]

Glad the problem is resolved!  On to enjoying the benefits, BigPelo!

 

[DJE624]

Sounds good BP!

 

[BiGMaC]

Glad you found it.  Cruising in style now!
Sometimes it's the smallest things... just hard to find in that crowded engine compartment that we have. :doh: