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VW B5 Passat TDIs This is a general discussion about B5 Passat(>98 (2004-2005 in North America)). Non TDI related postings will be moved or removed.

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Old January 26th, 2013, 11:11   #1
@Tdi VW
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Default Thermostat...OEM Vs Aftermarket

Im about to change the thermostat on my B5 PD.
Should i get an OEM one or Aftermarket are ok too.
Thanks
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Old January 26th, 2013, 14:05   #2
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oem only as per oilhammer
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Old January 26th, 2013, 14:18   #3
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Originally Posted by thundershorts View Post
oem only as per oilhammer
sorry but i didnt get that
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Old January 26th, 2013, 14:28   #4
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Oilhammer is kinda THE go-to guru. He works on LOTS of these and drives one, too.
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Old January 26th, 2013, 14:49   #5
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So original Vw one is the right choice
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Old January 26th, 2013, 15:36   #6
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YEs go with the one from the dealer...i have used 5 aftermarket ones....they never seem to let the engine run at optimum temp..I have one from the dealer now...worth every penny
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Old January 26th, 2013, 15:40   #7
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Thanks
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Old January 30th, 2013, 11:17   #8
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I just installed one from Carquest (Carquest brand - not one they brought in from World Pac) and it is working fine. It was made in France.
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Old January 30th, 2013, 11:29   #9
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I just installed one from Carquest (Carquest brand - not one they brought in from World Pac) and it is working fine. It was made in France.
I bought a few of those....they are the exact reason i went back to the dealer to buy one..I got sick of changing them every year due to slow warm-up/failing to maintain temperature.average temp with a aftermarket one in my car....75-83C...Now with the dealer supplied one i maintain 87-93C even on the coldest days.
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Old January 30th, 2013, 11:29   #10
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If you can find one, Behr is who makes them for this application. Not Wahler (although VR6 stats are indeed made by Wahler).

I use the OEM ones from Volkswagen exclusively though.
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Old January 30th, 2013, 14:36   #11
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Quote:
Originally Posted by Dieselducky View Post
I bought a few of those....they are the exact reason i went back to the dealer to buy one..I got sick of changing them every year due to slow warm-up/failing to maintain temperature.average temp with a aftermarket one in my car....75-83C...Now with the dealer supplied one i maintain 87-93C even on the coldest days.
Did they ever maintain temp or was it right from the start? It was 10F today and it took less than 5 minutes to get up to temp. Temp held w/o no problem.
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Old February 1st, 2013, 12:11   #12
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I Can have a Behr one for 10 $
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Old February 2nd, 2013, 17:58   #13
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Quote:
Originally Posted by @Tdi VW View Post
So original Vw one is the right choice
Yes. The one that you buy at the dealer it's known as the OE part. OEM for the thermostat parts are Wahler, Behr etc. who design & manufacture thermostat parts for VAG OE parts
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