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TDI Conversions Discussions on converting non TDIs into TDIS. More general items can be answered better in other sections. This is ideal for issues that don't have an overlap and are very special to swaping engines.

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Old August 19th, 2014, 21:14   #16
Wing_man
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Originally Posted by jonlowe View Post
How's the power? The all road is about 600 lbs heavier than the Passat, according to the figures I've found. Does the engine have a tune?

Did you get your climate control electrical issues sorted out?

What did you have to do to the fuel system to work with diesel fuel?

I'm very impressed.

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It has a stage 2 tune, and I think the 6spd really helps to pep it up. It feels like it's quicker than the passat.
I've been working midnights so I haven't really been working on the car at all, I've been getting some pretty good idea's on possible reasons why the air conditionning and the cruise control wouldn't be working. Thanks vwztips, and other's who have given me their input...
Aside from emptying out and flushing the fuel tank, the only other thing that's necessary is to splice a ''T'' fitting into each of the Feed and Return line, then link them together, that way the extra pressure from the gasser pump can bypass the engine and return to the fuel tank.
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Old August 19th, 2014, 21:49   #17
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Originally Posted by Wing_man View Post
The stock Passat downpipe would have been okay, some fabrication is absolutely necessary if you want to re-use the original audi cat back system. I made a new downpipe that gave the transmission a lot of clearance, that way when ever I have to remove the transmission I don't need to bother with removing the downpipe first.
Dang, you make this look easy Wingman. A few more questions if you don't mind:
- does the Passat front cross member bolt right up to the Allroad? I've disassembled the front end of my C5 A6 enough to be familiar but never my 04 Passat (which is identical to your donor btw).
- Is the TDI radiator mounted to the Allroad plastic carrier or is it permanently mounted to the modified metal cross member? We're you able to reuse the existing AC and coolant hoses?
- were there significant electrical challenges?
- did you keep the air suspension or go with struts instead?

Thanks for your contribution to the forum Wingman!
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Old August 19th, 2014, 22:39   #18
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Dang, you make this look easy Wingman. A few more questions if you don't mind:
- does the Passat front cross member bolt right up to the Allroad? I've disassembled the front end of my C5 A6 enough to be familiar but never my 04 Passat (which is identical to your donor btw).
- Is the TDI radiator mounted to the Allroad plastic carrier or is it permanently mounted to the modified metal cross member? We're you able to reuse the existing AC and coolant hoses?
- were there significant electrical challenges?
- did you keep the air suspension or go with struts instead?

Thanks for your contribution to the forum Wingman!
Passat front cross memeber will bolt up.
-You will need to either remove the passat front crossmember's tow hook; or cut out the audi's threaded tow hook recepticle in order to have the passat crossmember sit flush with the audi's frame. (trial and error until it fits really)
-The passat rad is supported the passat crossmember, and held in at the top with stock audi plastic clips on audi rad mount. Really wish I had taken more pictures, it's difficult to word.
-Since it's the passat rad, and a/c compressor, I've used all passat coolant/boost/power steering/air conditionning lines.
-I kept the original air bag suspension, no issues yet '' knock on wood ''.
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Old August 20th, 2014, 05:54   #19
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Have you driven it enough to get any mileage figures? I'd suspect it would get in the low 30mpg range. My 2005 Passat wagon with a 5speed and stage 2 tune gets between 35-40mpg.

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Old August 20th, 2014, 09:58   #20
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Thanks, It's not euro, I'm canadian KM/H haha.
I am Canadian too but normally our clusters have KM/h AND MPH (in fact I think technically they have to). I am pretty sure that is a Euro cluster!
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Old August 20th, 2014, 12:11   #21
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I am Canadian too but normally our clusters have KM/h AND MPH (in fact I think technically they have to). I am pretty sure that is a Euro cluster!
I hadn't realised, I guess the previous owner was a ''Euro Enthusiast''. Freebie!
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Old August 21st, 2014, 07:06   #22
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I am Canadian too but normally our clusters have KM/h AND MPH (in fact I think technically they have to). I am pretty sure that is a Euro cluster!
Um that's false. Canada only requires to have km/h on our speedometers. Every vehicle I currently drive / ride has a km/h only speedometer. That's from my 1982 Volkswagen Cabriolet to my 2013 BMW 650 GS Sertao. Perhaps if you drive a Ford / Dodge / Chrysler you might see MPH... but those aren't real cars so...

My former 2001 Allroad had the exact same cluster - no MPH.
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Old August 21st, 2014, 07:58   #23
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The wagon I bought from Windex had only Km/h on the speedometer as well. It was the only thing I had to change when I bought it into the states.
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Old August 21st, 2014, 11:34   #24
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Hmm. My mistake I guess. Both the Jetta and Passat in my signature have KM/h on the outer track and MPH on the inner track (the Passat W8 cluster was swapped for the Euro cluster than matched the engine and it is only Km/h).

This Wikipedia page says a Canadian speedometer is as described above (in the little box with the photo on the right half way down the page) http://en.wikipedia.org/wiki/Kilometres_per_hour

I stand corrected though!

Sorry for the hijack, back to your Allroad TDI!
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Old August 22nd, 2014, 19:02   #25
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Yes lol, back to the Allroad!
I got the cruise control to work tonight... The original BHW harness did not have a wire coming out of pin #43 ( Clutch )... Obviously it used to be an automatic... That's why I couldn't find the wire.
I took the ECM connector apart, and used a connector from an unused pin of the T15 Passat connectors to re-pin no.43 of the ECM harness. Connected that to the original Audi clutch wire and Bingo! Man I was so happy.. Driving on the hi-way I would instinctively hit the cruise control button... Clearly nothing would happen. This was absolutely infuriating.

Here are some pics of the wiring, The random purple wire that fixed the cruise control, goes from the ECM connector to the Clutch wire at the fuse box connection area.



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Old August 25th, 2014, 05:38   #26
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Keep the info coming Wing_man. I'm very interested in this swap.
Did the Passat engine mounts bolt right in or did you have to change something?

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Old August 25th, 2014, 07:53   #27
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Keep the info coming Wing_man. I'm very interested in this swap.
Did the Passat engine mounts bolt right in or did you have to change something?

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No, straight bolt in!
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Old August 25th, 2014, 12:27   #28
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Did you get the A/C figured out? I spent some time today staring at wiring diagrams for the allroad and the Passat. From what I can tell, there are three connections from the Motronic unit on the 2.7t to its climate control, and only two from the Passat ECU to the climate control. On the allroad side, terminals 40, 41 and 37 of the Motronic connect to A7, C15, and A2 respectively on the E87, A/C control head.

On the Passat side, ECU connections T94/85 and T94/50 connect to T12/2 and T16b/12 on the Climatronic, J255 unit. Of course there is no indication of what any of the wires/connections actually do.

I'm going to look at the other engine variants of the Passat and see if I can see any similarities.

EDIT: I did find that on the Passat Climatronic, pin T12/2 is "RPM increase" and T16b/12 is "Engine electronics, bi-directional". I can't find a similar pinout for the allroad.

Jon

Last edited by jonlowe; August 25th, 2014 at 13:25. Reason: More info
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Old August 25th, 2014, 12:54   #29
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if I am not mistaken the Passat uses a compressor without a clutch, and the Allroad uses a compressor with a clutch.
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Old August 25th, 2014, 14:00   #30
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if I am not mistaken the Passat uses a compressor without a clutch, and the Allroad uses a compressor with a clutch.
ELSA and ETKA both show that the Passat has a clutch on the compressor. My 2005 certainly has one. I've never seen a auto AC compressor without one; I don't know how you'd shut off the AC otherwise.

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