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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 August 13th, 2015, 12:10   #16
Windex
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Quote:
Originally Posted by B4Ugo View Post
I see that a couple of people have welded the coolant pipes on the EGR cooler.

Is this necessary?

If tuning out the EGR (or unplugging the connector) keeps exhaust from flowing through it, why weld it?
Because sometimes the EGR cooler will crack and allow coolant to go into the engine via the EGR valve. Crimping off the coolant lines (or welding/looping etc) prevents this.
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Old August 22nd, 2015, 16:16   #17
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Because sometimes the EGR cooler will crack and allow coolant to go into the engine via the EGR valve. Crimping off the coolant lines (or welding/looping etc) prevents this.
So I just took the coolant lines off of my cracked cooler and looped them together. There is no longer coolant flowing through the EGR cooler. Also, the EGR valve is disconnected, so no more exhaust flowing through either.

Sorry I wasn't more clear... Is it still necessary to crimp/weld the coolant pipes?
If so, why?
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Old August 22nd, 2015, 18:28   #18
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No, if you have blocked off the egr and connected the pipes to each other, then you are good.
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Old August 24th, 2015, 20:27   #19
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Cool. Thx Windex
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Old July 13th, 2019, 15:23   #20
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Can someone tell me where the non heater core coolant line connects to? Mine ripped by the EGR and I can't locate the other side.

Sam
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Old July 13th, 2019, 16:25   #21
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To answer the question, it goes to the coolant flange. Which is actually what broke apart on mine.

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