Difference between revisions of "Local Copy - TDI Piston Info"
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Cyl 1 & 2 038-107-065-AA (MAHLE) | Cyl 1 & 2 038-107-065-AA (MAHLE) | ||
Cyl 3 & 4 038-107-065-AB (MAHLE) | Cyl 3 & 4 038-107-065-AB (MAHLE) | ||
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| + | Here are a few pics comparing a 1z piston to the Nural ALH piston. I put the Nural piston in every 1z/ahu/alh block I rebuild. | ||
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| + | [[File:1zvsNuralALHPiston-a.jpg]] | ||
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| + | [[File:1zvsNuralALHPiston-b.jpg]] | ||
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| + | [[File:1zvsNuralALHPiston-c.jpg]] | ||
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| + | [[File:1zvsNuralALHPiston-d.jpg]] | ||
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| + | [[File:1zvsNuralALHPiston-e.jpg]] | ||
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| + | [[File:1zvsNuralALHPiston-f.jpg]] | ||
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| + | [[File:1zvsNuralALHPiston-g.jpg]] | ||
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| + | [[File:1zvsNuralALHPiston-h.jpg]] | ||
Revision as of 03:34, 17 December 2019
Local copy of the TDI Club thread
1999 1999 AHU (A-3) engine # 101808 and above Cyl 1 & 2 038-107-065-AA (MAHLE) Cyl 3 & 4 038-107-065-AB (MAHLE)
1999 AHU / 1Z (A-3 & B-4) engine # 101807 and lower Cyl 1 & 2 038-107-065-D Cyl 3 & 4 038-107-065-E
1999 AHU engine # 101808 and above Cyl 1 & 2 028-107-065-BK (ALCAN) Cyl 3 & 4 028-107-065-BN (ALCAN)
1998 1998 AHU / 1Z (A-3 & B-4) engine # 101807 and lower Cyl 1 & 2 038-107-065-D Cyl 3 & 4 038-107-065-E
1998 AHU engine # 101808 and higher Cyl 1 & 2 028-107-065-BK (ALCAN) Cyl 3 & 4 028-107-065-BN (ALCAN)
1998 AHU (A-3) engine # 101808 and higher Cyl 1 & 2 038-107-065-AA (MAHLE) Cyl 3 & 4 038-107-065-AB (MAHLE)
1997 1997 1Z / AHU engine # 101807 and lower Cyl 1 & 2 038-107-065-D Cyl 3 & 4 038-107-065-E
1997 AHU (A-3) engine # 101808 and higher Cyl 1 & 2 038-107-065-AA (MAHLE) Cyl 3 & 4 038-107-065-AB (MAHLE)
1997 AHU (A-3) engine # 101808 and higher Cyl 1 & 2 028-107-065-BK (ALCAN) Cyl 3 & 4 028-107-065-BN (ALCAN)
1996 1Z engine # 101807 and lower Cyl 1 & 2 038-107-065-D Cyl 3 & 4 038-107-065-E 1996 engine # 101808 and higher Cyl 1 & 2 038-107-065-AA (MAHLE) Cyl 3 & 4 038-107-065-AB (MAHLE)
A-4 ALH engine
A-4 ALH series 1999.9 thru 2003
Cyl 1 & 2 038-107-065-AA (MAHLE)
Cyl 3 & 4 038-107-065-AB (MAHLE)
Now here is where I'm a bit confounded: The AHU and 1Z engines both have the same block (028-100-090-TX) Both engines use the same crank (028-105-101-L) Both engines use the same rods (028-198-401-F)
The only thing I see different between these engines (1Z / AHU) are the pistons.
Early: AHU / 1Z (A-3 & B-4) engine # 101807 and lower Cyl 1 & 2 038-107-065-D Cyl 3 & 4 038-107-065-E Late: Cyl 1 & 2 038-107-065-AA Cyl 3 & 4 038-107-065-AB
The A-4 ALH engine uses the same connecting rods (028-198-401-F)
My questions are:
Ques. #1
Are these pistons the same but only different manufactures?
1998 AHU engine # 101808 and higher
Cyl 1 & 2 028-107-065-BK (ALCAN)
Cyl 3 & 4 028-107-065-BN (ALCAN)
1998 AHU (A-3) engine # 101808 and higher Cyl 1 & 2 038-107-065-AA (MAHLE) Cyl 3 & 4 038-107-065-AB (MAHLE)
Ques. #2
Are the pistons for the higher # series (101808 & higher) the same design but different manufactures? ALCAN ~V~MAHLE ? In other words are these pistons interchangeable?
Cyl 1 & 2 028-107-065-BK (ALCAN)
Cyl 3 & 4 028-107-065-BN (ALCAN)
Cyl 1 & 2 038-107-065-AA (MAHLE)
Cyl 3 & 4 038-107-065-AB (MAHLE)
Ques. #3
If you were rebuilding a 1Z or AHU of any series # (high or low) What is the reason you could not use the A-4 pistons (as long as you used all 4 of the same P/N AA & AB)? Cyl 1 & 2 038-107-065-AA (MAHLE) Cyl 3 & 4 038-107-065-AB (MAHLE)
Here are a few pics comparing a 1z piston to the Nural ALH piston. I put the Nural piston in every 1z/ahu/alh block I rebuild.
