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Old March 25th, 2017, 22:44   #1
crawdaddy
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Default 1J0906391B Heater Tube

Are these known to fail?
This part is located on an ALH, might be other engines as well, just after the air box and is hooked up to the CCV on top of valve cover.

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Old March 26th, 2017, 05:33   #2
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If yours failed then they are now known to fail.
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Old March 26th, 2017, 21:11   #3
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Quote:
Originally Posted by JETaah View Post
If yours failed then they are now known to fail.
We're still trying to ascertain this point

Man, my list of things to worry about just doesn't seem to be getting any shorter!
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Old March 26th, 2017, 22:36   #4
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is it just a resistance test to see if it's failed? is there a MIL code associated with the failure? can't say I've had any issues with them. might have a spare in my box of hoarded parts... maybe I'll ohm it and see.
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Old March 26th, 2017, 22:43   #5
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It's a simple heater. I doubt it is monitored by the ECU, though anything is possible. It's just a simple heating element, so a resistance check should do it - if it's an open circuit it's bad, otherwise I'd expect it to be good.

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Old March 27th, 2017, 05:29   #6
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Try unplugging it and see if it does throw a code.
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Old March 27th, 2017, 06:28   #7
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Its not monitored, its just a lill 12v heater hooked up to ignition power.

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Maybe I should pay MYSELF to do bad work on my car!
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Old March 27th, 2017, 18:56   #8
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This is a really interesting thread. I'm curious as to the real reason for this piece. Does it affect cold running?
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Old March 27th, 2017, 18:57   #9
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It keeps the PCV vapors, which have some moisture, from freezing in cold weather and blocking the PCV.

-J
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Maybe I should pay MYSELF to do bad work on my car!
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Old March 27th, 2017, 20:29   #10
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Quote:
Originally Posted by compu_85 View Post
It keeps the PCV vapors, which have some moisture, from freezing in cold weather and blocking the PCV.

-J
Wow!

I wonder how much frozen moisture it takes to block the PCV? Clearly, at one point, VW identified a problem
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Old March 27th, 2017, 21:03   #11
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It's one of those things that just needed to happen once or twice during specific conditions to justify needing the part. VW used essentially the same thing on all their engines.

I don't think it'd be a common problem at all, but if your CCV froze up and blew the oil seals on your engine once every couple of years in the winter you'd be pretty PO'd.

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Old March 28th, 2017, 02:01   #12
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Quote:
Originally Posted by vanbcguy View Post

I don't think it'd be a common problem at all, but if your CCV froze up and blew the oil seals on your engine once every couple of years in the winter you'd be pretty PO'd.
Or if it happened enough times while the cars were still under warranty, then Volkswagen would have been PO'd.

Interesting to know why it is there. I'm sure I read this before but paid little attention to it.
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Old March 28th, 2017, 22:32   #13
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The reason I was asking that I have a old one from a parts car and was planning on using it for my CCV catch can mod.
But couldn't use it because the connectors are wrong.
Ended up using the top one in photo, original one. I remembered that I kept the end piece that clips on the end to make the OD smaller.
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Old March 29th, 2017, 01:00   #14
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Shouldn't be anything stopping you from swapping connectors and using whatever fits your purpose.

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Old March 29th, 2017, 07:20   #15
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VW started fitting those to their cars in the 80s I think. Both of my ECOdiesels (91 and 92) had them.

-J
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1991 Mercedes 350SDL 230,000 miles, 70,000 on engine. 18/27 MPG.
Past:
2012 Passat SE TDI DSG. 114,000 miles. LED tails, Memory Seat, HIDs. Bought back by VW.
2004 Touareg V10 TDI. 165,000 miles. Sold to Matt98AHU w/ flat camshafts.
1988 Audi 5000S Quattro, 1992 Jetta ECOdiesel, 1991 Jetta ECOdiesel.
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Quote:
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Maybe I should pay MYSELF to do bad work on my car!
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