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      07-16-2013, 02:31 PM   #1
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Overheating - Cobb tune?

My car started overheating yesterday and went into limp mode. It was 91 degrees out, I was on the highway with the AC on.

I'm running an OTS Cobb tune for stock engine with 93 octane fuel. I run 93 and my engine is stock so I assume the tune should be fine.

Has anybody had overheating problems with a Cobb OTS tune?

Should I try going back to OEM tune before moving on to other trouble shooting options?
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      07-16-2013, 02:35 PM   #2
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yes, but I don't think the Cobb is the problem... but if you end up taking it to the dealer you want any relevant codes to be readable by them and the tune out so you may as well uninstall the Cobb now.

I'm running Cobb Stg1+FMIC and it was 95F out yesterday, drove a couple hours both on highway and in stop and go traffic, my oil never got over 240-245 (I couldn't see water as I didn't have the Cobb plugged in) so I don't think the tune is your problem.
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      07-16-2013, 03:18 PM   #3
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Quote:
Originally Posted by N8N View Post
yes, but I don't think the Cobb is the problem... but if you end up taking it to the dealer you want any relevant codes to be readable by them and the tune out so you may as well uninstall the Cobb now.

I'm running Cobb Stg1+FMIC and it was 95F out yesterday, drove a couple hours both on highway and in stop and go traffic, my oil never got over 240-245 (I couldn't see water as I didn't have the Cobb plugged in) so I don't think the tune is your problem.
It stinks you can't see coolant temp without a Cobb plugged in. I don't think I've ever had a car that didn't show coolant temp.
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      07-16-2013, 03:56 PM   #4
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I think my water pump is toast

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      07-16-2013, 03:57 PM   #5
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I would guess yes, might as well replace thermostat at same time
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      07-16-2013, 04:10 PM   #6
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looks like I'm not the first with this issue:

http://www.e90post.com/forums/showth...=621838&page=2
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      07-16-2013, 04:13 PM   #7
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I'm over 40k, so I'm guessing the warranty on this is over.

I found a DIY for a automatic. Somebody posted a video in there for the manual too.

http://www.e90post.com/forums/showth...ump+thermostat

I have to install my new IC, so maybe I'll do both at the same time.

where is a cheap source for parts?
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Last edited by tb30570; 07-16-2013 at 04:46 PM.
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      07-16-2013, 04:26 PM   #8
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Quote:
Originally Posted by tb30570 View Post
is there a DIY for water pump and thermostat? I'm over 40k, so I'm guessing the warranty on this is over.
The BMW new car warranty is 4 yr/50K from initial in service date. Depending on when your car was put on the road, you may or may not be covered.

http://www.bmwusa.com/Standard/Conte.../Warranty.aspx
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      07-16-2013, 04:27 PM   #9
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I haven't done it, just did a quick search

http://www.e90post.com/forums/showthread.php?t=784416

I thought warranty was 50K miles? you're probably over on time though what was your in service date?
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      07-16-2013, 05:13 PM   #10
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The BMW new car warranty is 4 yr/50K from initial in service date. Depending on when your car was put on the road, you may or may not be covered.

http://www.bmwusa.com/Standard/Conte.../Warranty.aspx
I called and found out the warranty expired on May 26th 2012.
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      07-24-2013, 11:50 PM   #11
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Quote:
Originally Posted by tb30570 View Post
Has anybody had overheating problems with a Cobb OTS tune?

Should I try going back to OEM tune before moving on to other trouble shooting options?
Why would you automatically think that the problem was from the tune?
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