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post #1 of 4 (permalink) Old 01-28-2018, 07:35 AM Thread Starter
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Join Date: Jan 2018
Location: Milwaukee Wi.
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New Cobalt Owner 2005 LS

Hello fellow Cobalt owners; I purchased a 2005 LS for my son to drive yesterday. Pretty clean car but it's got some miles on it. 166,000 and I gave a whopping 2500 dollars for it... Everything works, but it was sold with a CEL for the P0036 code (HO2 - bad heater) so, I'll be swapping the HO2 out and it should reset the CEL.

Really doesn't need anything else. Had new struts/shocks @ 130K, just had new tires installed. Clean interior and was owned by a non-smoker.

Hope to learn a few things here. I'm an aircraft mechanic by trade so getting my hands dirty on this will be (should be) easy...

I did a little searching and I'm contemplating changing the chain tensioner, but it's quiet right now, so perhaps leave it until it starts to make noise?

Only other thing I need to look at is some oil residue on the valve cover, which could be the PCV valve not doing it's job. Why GM thought it was a good idea to integrate the PCV valve into the cover, I'll never understand. Cheaper and easier to produce I suppose..

2005 Cobalt LS
2005 Lexus LS430
2001 Lexus LS430
1998 Dodge Dakota SLT
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post #2 of 4 (permalink) Old 02-01-2018, 05:19 PM
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Location: Wisconsin
Posts: 168
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Hey, welcome!!! I'm just up the road from you near PortWashington!

2009 Cobalt 5 speed Coupe
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2001 Chevy S10
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2003 Hyundai Elantra GT
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post #3 of 4 (permalink) Old 02-02-2018, 04:45 AM Thread Starter
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Originally Posted by Thogan3 View Post
Hey, welcome!!! I'm just up the road from you near PortWashington!
Thanks very much Thogan. I swapped out the tensioner, and overall it seems like a pretty easy car to work on. I got that HO2 sensor in the mail yesterday, so I'll tackle that this afternoon with my son. I'm hoping that this takes care of the problem. It should anyway...

I also noticed that the right rear window makes a lot of wind noise, so I pulled the seal back and ran a bead of black RTV around the edge of the seal. It seems to have helped some, but it still makes a little noise..

2005 Cobalt LS
2005 Lexus LS430
2001 Lexus LS430
1998 Dodge Dakota SLT
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post #4 of 4 (permalink) Old 02-02-2018, 07:39 AM
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Quote:
Originally Posted by N84434 View Post
Thanks very much Thogan. I swapped out the tensioner, and overall it seems like a pretty easy car to work on. I got that HO2 sensor in the mail yesterday, so I'll tackle that this afternoon with my son. I'm hoping that this takes care of the problem. It should anyway...

I also noticed that the right rear window makes a lot of wind noise, so I pulled the seal back and ran a bead of black RTV around the edge of the seal. It seems to have helped some, but it still makes a little noise..
Some things are easy, and some things are damn near impossible but with enough alcohol and cursing, anything is possible!

2007 Cobalt Coupe LT3 --130,000mls-- black bowties SOLD
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