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Timing belt broken, valves ok?

 
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Post27-11-2024, 14:41    Subject: Timing belt broken, valves ok? Quote

Hello, this is regarding a friend's A4 B9 with a 2.0 TDI DTPA (204 hp, 4-cylinder). In a not-too-serious accident, the hood has been pushed down onto the camshaft. The timing belt has also broken. In many 2.0 TDI engines, this can lead to contact between the valves and a piston. Is this also the case with this engine? Since this 4-valve engine has valves that move less than those in the old 2-valve engine, and also stand vertically (and not diagonally) to the piston, I think it might be possible that this could be different here.
Who knows it better?
And if there were a way to contact them: has anyone with experience with this engine type had any relevant experiences regarding the consequences?
The last question might seem trivial, but I had a similar experience with my 1.9 TDI (2-valve) engine many years ago: the same external damage, I painstakingly removed the entire cylinder head – and then, inside, there was nothing except minimal contact marks. All the valves were still sealed. Only 3 pistons were noticeably worn and needed to be replaced. And for that, I could have avoided the complicated head removal... The engine ran without problems for another 150,000 km for me.
Therefore, I am hoping to gain specific experiences regarding belt cracking with this newer engine type.


Translated on 03-07-2026, 15:19.
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Post27-11-2024, 20:57    Subject: Timing belt broken, valves ok? Translating...

[Translating...]

Hallo
Quote:

Bei vielen 2,0 TDi kann es dabei zum Kontakt der Ventile mit einem Kolben kommen.

Bei allen. Dieselmotoren sind durch die hohe Kompression eigentlich nie Freiläufer.

Recht sicher ist der Motor Schrott, wenn nicht einiges an Zeit vorhanden, besser Austauschmotor besorgen.

LG, Rainer
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Post28-11-2024, 9:19    Subject: Timing belt broken, valves ok? Translating...

[Translating...]

Rübe runter und schauen

Dazu Kolbenüberstand messen
Sommer: A4 B5 Avant 2,5 TDI Quattro Facelift (AKN silber)

Wartet auf H Kennzeichen: A4 B5 Avant 1.9 TDI Quattro (AFN Schwarz)

Winter: A4 B5 Avant TDI Quattro (AFN rot)

Alltags Spardose: Audi A2 1.4 TDI (AMF Silber)
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