Quote:
Originally Posted by Oli18
Going back to parts again...(please feel free to correct me if i'm wrong about any of the techy stuff below):
I'm after part number 077103266MX and was found on some (but not all) AQG engines.
THis is what Mastertechs told me atleast but the part was found on A8s with the following chassis details
example chassis number:
WAUZZZ4DZXN007482
The number after the 'X' should be greater than 009000
or any 8s with a 'Y' chassis..
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.... and I was all set to correct you, but now I'm not sure whats incorrect....
I can see exactly where those details have come from, as the cylinder heads were revised from VIN WAUZZZ4DZXN009001.
The VIN means not a lot to most people, so lets drop the non-significant digits and the remains are treated in a purely sequential alphanumerical fashion, so the significant parts of that example VIN are 4D-X-009001 where 4D is the body (Audi A8) and dashes can be ignored. The rest, X-009001 is essentially what we are interested in. The 'X' incremenrs alphanumerically, so Y, Z, 1, 2,3 etc with each being newer than the last. The last 6 digits are a simple sequence. The theory says that at that particular VIN, the design of the 3.7 AQF was changed, and thus parts from before, and parts after wouldn't interchange, which is where we thought we were at.
Now, This is all fine if our donor car has a VIN lower than 4D-X-009000, but it doesn't. It was WAUZZZ4DZYN002193, or 4D-Y-002193 in 'significant' terms. This suggests that the donor head would be the same as Olis, which it obviously wasn't
Being the 'electronics' guy in a8parts, not liking oil much, I'd based my findings about incompatiblity on the engine ECU change at VIN 4D-Y-003000 which does correlate with the idea that the head we supplied would be different from Oli's own which is in the region of '4D-Y-009500'
So, Oli is definitely on the newer ECU, and newer heads. According to the records, our car should have the newer head, but older ECU
I am, quite honestly baffled now. I had logically assumed the engine ECU change was to do with the engine redesign and the new exhaust gas recirculation feature, which is the cause of the all problems. Now, I fail to see why the head design changed at one point, and the ECU changed later on....
And in any case, why is our engine different to Olis !!
I concur with your part number, but dont understand why we dont have the right one......
Yours confusedly....
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