I've asked before if sludge can cause timing belt failure and the general response is no. But, I keep seeing connected statements like the one above. Is there a way to definitively determine if sludge caused a timing belt failure?quote:
Audi Junkie
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The oil pump pick-up is what gets clogged. My cuz went from zero-maintenance Rabitts and Jettas to 1.8t Passat and snapped a TB at 175k. Mechanic (not mine) put it together with new valves and TB to find low OP.
Well, in fairness, the number of makes and models that are not having problems with OCIs that are beyond 3k, to a reasonable extent (5k, 7.5k, etc depending upon application) seems to be a lot longer than the list of problem cases.quote:
Originally posted by Ray H:
One more reason why I change oil and filter every 3,000 miles. The chickens are coming home to roost, extended OCI-ers.
Mercedes-Benz
DaimlerChrysler
Toyota
VW-Audi
BMW
Who's Next?
Because there are two versions of the 1.8T. The one in Golfs, Jettas, etc. have a 4.6 quart sump. The Passat/A4 1.8T have a 3.9 quart sump.quote:
Originally posted by rjundi:
Strangely enough the 1.8T is used throughout the VW lineup or has been Golf/GTI, Jetta, and New Beetle to name a few. I wonder why these are not included in that letter?
cough cough...no it did not take until the 70s and 80s, with older oils sludge was a common thing, just try taking apart a 50s or 60s small block Chevy. I'm sure it was even more common in the days before that of non-detergent oil. to say sludge first showed up in Europe in the 70s/80s is totally false.quote:
Originally posted by moribundman:
As everyone probably knows, sludge first appeared in the '70s and '80s in Europe
I'm not sure I'd be quite so harsh in my clarifying that assertion. I'd certainly agree that a previously uncommon sludge-making process became common in the 70s and 80s. In particular, we began to see ever smaller engines pushed to new performance heights, often with the primitive turbos of the day. Those engines could turn what was then thought to be good oil into black death in no time flat. Oversimplifying, these engines burned up and polluted their oil very quickly. Engines of earlier years got sludgy because of poor primitive oils, steamy lukewarm engine temps, lead in gasoline, inadequate CCV, and so forth.quote:
Originally posted by Brons2:
cough cough...no it did not take until the 70s and 80s, with older oils sludge was a common thing, just try taking apart a 50s or 60s small block Chevy. I'm sure it was even more common in the days before that of non-detergent oil. to say sludge first showed up in Europe in the 70s/80s is totally false.quote:
Originally posted by moribundman:
As everyone probably knows, sludge first appeared in the '70s and '80s in Europe
Was it a 1.8T with a 3.9 quart sump?quote:
Originally posted by Dr. T:
Talk to Moribundman about 10k intervals with Syntec 5-50 and look at his engine pics...and then tell me if you see sludge... [/QB]
It's a 2.8 normally aspirated V6 with a 5.2 qt sump. I never used anything but A3 rated oil (until now).quote:
Was it a 1.8T with a 3.9 quart sump?