Need help with a 2002 Ecotec 2.2 Motor - Yamaha R1 Forum: YZF-R1 Forums
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post #1 of 34 (permalink) Old 12-16-2011, 02:24 PM Thread Starter
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Need help with a 2002 Ecotec 2.2 Motor

I'm trying to help my sister out with her car and I'm having trouble finding information on the internet. She is in college in Las Vegas and I'm in MD.

She has a 2002 Pontiac Sunfire GT with the 2.2 Ecotec and she got a CEL P0128

A code P0128 may mean that one or more of the following has happened:
* Low engine coolant level
* Leaking or stuck open thermostat
* Faulty cooling fan (running too much)
* Faulty coolant temperature (ECT) sensor
* Faulty intake air temperature (IAT) sensor

Her coolant was low so I had her top it off but I think she has an air bubble in the cooling system. I can't find out if there is a bleeder valve on this motor. I've looked and can't find a service manual and I've posted on the JBody Forum but haven't got any replies.
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post #2 of 34 (permalink) Old 12-16-2011, 02:27 PM Thread Starter
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She let the car idle for 15 minutes after topping off the coolant and the car barely got up to temp. I had her let it run for a total of 15 minutes. She sent me a picture of where her thermostat is at. I'm hoping it's not the thermostat because it's not something I think she could do since it's under the exhaust manifold between the engine and the motor.
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Last edited by Brian0128; 12-16-2011 at 03:39 PM.
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post #3 of 34 (permalink) Old 12-16-2011, 03:22 PM
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Any shop should charge under a 100 to change the thermostat.


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post #4 of 34 (permalink) Old 12-16-2011, 03:28 PM
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from the parts breakdown it looks like there is a bleeder on the thermostat housing
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post #5 of 34 (permalink) Old 12-16-2011, 03:30 PM Thread Starter
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Quote:
Originally Posted by BeaverPuncher View Post
Any shop should charge under a 100 to change the thermostat.
She took it to Midas and they quoted her $430 because they said they had to remove the exhaust manifold and it was a 3.5 hour job total. That seems a little high to me even if you have to remove the manifold.

Last edited by Brian0128; 12-16-2011 at 03:34 PM.
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post #6 of 34 (permalink) Old 12-16-2011, 03:35 PM
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They are shafting her at 430$. They are tough to change but you don't have to drop the headers. These cars are notorious for geting air trapped in the coolant system due to the radiator being lower than the engine. On the coolant pipe coming out of the right side of the engine there is a very small bleeder screw. Tell her to be prepared to bleed it many many many times!
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post #7 of 34 (permalink) Old 12-16-2011, 03:36 PM
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post #8 of 34 (permalink) Old 12-16-2011, 03:36 PM Thread Starter
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I did a little bit of research on the back side of the motor looking for a bleeder valve and still can't find it. Here is a pic of the back of the motor that isn't in the car.


this is the firewall side of the engine.

left of the picture would be driver side, right of the picture would be passenger side.

I was told that to get the thermostat, to go to the back of the motor and remove manifold, then find the the thicker part of the squiggly tube... take out the two 10mm bolts. then twist and pull the tube out of the water pump and the thermostat is right there.
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post #9 of 34 (permalink) Old 12-16-2011, 03:38 PM Thread Starter
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Quote:
Originally Posted by Dropem_low View Post
They are shafting her at 430$. They are tough to change but you don't have to drop the headers. These cars are notorious for geting air trapped in the coolant system due to the radiator being lower than the engine. On the coolant pipe coming out of the right side of the engine there is a very small bleeder screw. Tell her to be prepared to bleed it many many many times!

I have searched all over the internet looking for a picture to show her where it's located. Would you happen to have one?
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post #10 of 34 (permalink) Old 12-16-2011, 03:40 PM
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Quote:
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I have searched all over the internet looking for a picture to show her where it's located. Would you happen to have one?
see above
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post #11 of 34 (permalink) Old 12-16-2011, 03:41 PM
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Quote:
Originally Posted by Brian0128 View Post
I have searched all over the internet looking for a picture to show her where it's located. Would you happen to have one?
Sorry man I don't. Wasn't my car I changed the thermostat in
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post #12 of 34 (permalink) Old 12-16-2011, 03:46 PM
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as far as the shop goes they're going to charge flat rate whether it takes the time or not. list price on stat is roughly 50, exhaust manifold gasket 30. so 3.5 hrs at 100 an hour (which is believable for vegas) and theres your 430
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post #13 of 34 (permalink) Old 12-16-2011, 03:46 PM Thread Starter
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Quote:
Originally Posted by ss55539 View Post
see above
That's the back side of the motor where the thermostat is and she can't see anything down in that area that looks like a bleeder valve. I posted a picture of the back of the motor right next to your post above and it doesn't show a bleeder valve. I keep hearing that it's in the front or right of the motor but I can't locate a picture to show her. She has taken a bunch of pictures and sent them to me but none are a bleeder valve.
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post #14 of 34 (permalink) Old 12-16-2011, 03:47 PM
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Sorry the coolant line with the bleeder isn't on the right side. Its actually on the back of the engine. Tell her to just trace the coolant lines down and look for a very small bleeder screw

Last edited by Dropem_low; 12-16-2011 at 03:58 PM.
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post #15 of 34 (permalink) Old 12-16-2011, 03:48 PM
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most bleeders look like the bleeder on brakes, normally around the water pump or thermostat, if you cant find it, pull the radiator cap off and let the vehicle get to opp. temp. sometimes this works but its not guaranteed. as for the shop quote they're tryin to stick you in the butt with tht one. idk about most sear's in the area but the one i work at if full of very knowledgeable guys. you might try one in your area. they normally arent trying to bend you over and some will haggle with you. good luck tho, hope you get it figured out

and btw- my gmc sanoma has the same engine and i havent seen a bleeder valve?? maybe the sunfires are a diff app.
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post #16 of 34 (permalink) Old 12-16-2011, 03:50 PM
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the valve may be hard to see its just a little screw
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post #17 of 34 (permalink) Old 12-16-2011, 03:50 PM
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if nothing else you could always pull a heater hose to bleed it
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post #18 of 34 (permalink) Old 12-16-2011, 04:00 PM
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[QUOTE=loren;5071797]most bleeders look like the bleeder on brakes
This one doesn't. Just looks like a very small screw
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post #19 of 34 (permalink) Old 12-16-2011, 04:06 PM Thread Starter
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[quote=Dropem_low;5071808]
Quote:
Originally Posted by loren View Post
most bleeders look like the bleeder on brakes
This one doesn't. Just looks like a very small screw
Thanks for helping. She traced all lines back for me and took photos and couldn't locate it. It's possible this car doesn't have it.
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post #20 of 34 (permalink) Old 12-16-2011, 04:11 PM
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^^very possible, try pullin the cap, n go to autozone and have them clear the code, if its stays off you fixed it. if not....try a diff route.

Oh, and on the thermostat note, is the car over heating or not reaching opp. temp?
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