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VW MKIII-A3/B4 TDIs This is a discussion about MKIII-A3/MkIII Jetta/Golf (<99.5) and B4 Passats (96,97) TDI's. Non TDI related postings will be moved or removed.

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Old February 24th, 2019, 21:38   #1
Digital Corpus
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Default Interest in Alternate IP Reseal O-Rings?

Is anyone interested in alternate o-rings for the VE TDI injection pumps? That is, for the VP37 pumps? I've cross referenced the bores (ODs), ring groove depths (IDs), and widths where appropriate and have compiled a list of 8 primary and 6 secondary o-rings through McMaster-Carr.

The replacements o-rings Pump Head, N108 Top, N108 Bottom, Shutoff Solenoid, QA Top, QA Bottom, CPRV Top, CPRV Bottom. Primary material choice is fluorosilicone since I want to see if it is better and switching between a near zero aromatic fuel and D2, which will be analogous to D2 vs biodiesel, and I know that even Viton/fluoroelastomer will degrade from this over time too.

I will be testing/abusing special FEP sleeved fluoroelastomer o-rings as candidates of replacing the upper and lower proprietary QA seals as apart of this effort.
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Last edited by Digital Corpus; February 24th, 2019 at 21:51. Reason: details I forgot to add
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Old February 24th, 2019, 21:56   #2
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Yes, This is a cross-post between two forums, but it directly affects both and the seals are largely the same. Some pumps have x2 X-style o-rings that others do not, but the others appear to be the same, though not all users frequent both subforums. If the cross-post is still not desired by the mods, please feel free to lock either thread.
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Old March 1st, 2019, 12:01   #3
Chris_TDI_98
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Fuel Economy: 35 mpg with leaking injection pump
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How do I know whether or not my mk3 Jetta TDI 1z AHU has the VE (VP37) pump?
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Old March 1st, 2019, 13:16   #4
Digital Corpus
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What’s the part number on the pump?
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