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VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old May 11th, 2012, 23:27   #1
kirmet
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Default swapping PD engine for ALH in MKIV???

Have two TDI's now, one with ALH one with PD. If the PD dies would an ALH engine be an easy swap? Are the blocks the same? I suppose it would be easier to change the cam to something a bit more reliable than the PD, but WOuld be nice to have to cars with interchangable parts to keep them going for as long as possible.
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Old May 12th, 2012, 04:03   #2
turbocharged798
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Its by far not worth the effort.
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Old May 12th, 2012, 06:14   #3
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I agree, its not worth the effort. I do believe you would have to transfer ALL of the ALH specific electronics, including the ECU and harness and then have the imobilizer synced with the ECU if that is possible, or you may even have to install the ALH vehicle's instrument cluster, which may introduce a new host of issues. If it were me, and I really wanted to do this swap, I would only do it if I found out it was possible from someone else who was successful.

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Old May 12th, 2012, 13:43   #4
kirmet
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Yeah was wondering if it was a no brainer or at least a half brainer, figured it would be easier than converting a gas to diesel, sounds like it's about the same since you have to rewire a harness and other electronics.
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Old May 12th, 2012, 15:46   #5
turbocharged798
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Yeah, Honestly if I was going to go through that effort, I would do a gasser to diesel swap instead.

Its also technically illegal to put a older engine in a newer body. Not to mention why the heck would I want to put a slower, weaker, louder, smokier engine in anyway?
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Old May 12th, 2012, 20:10   #6
kirmet
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Quote:
Originally Posted by turbocharged798 View Post
Yeah, Honestly if I was going to go through that effort, I would do a gasser to diesel swap instead.
Its also technically illegal to put a older engine in a newer body. Not to mention why the heck would I want to put a slower, weaker, louder, smokier engine in anyway?
Reliability, better fuel economy and common parts with the other car I own. Not everyone wants to throw money at a 4 banger to try and make as much power as a stock v8 from the 60's
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Old May 14th, 2012, 14:16   #7
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I hope that your PD engine VW is doing well.
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Old May 16th, 2012, 09:01   #8
kirmet
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It is, I'm just thinking of trying to acquire another motor to build up in the garage and was hoping it would would go into the newer car if something bad happens to it.
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