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Fuels & Lubricants Discussion all about Fuels & Lubricants. synthetic oil, conventional oil, brands, change intervals, diesel grades, gelling and such debated items like that. Non TDI related postings will be moved or removed. This forum is NOT for the discussion of biodiesel and other alternative fuels.

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Old March 4th, 2009, 16:00   #1
donDavide
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Quote:
Originally Posted by mickyTDI
Just to add i can confirm that i know off a PD 150 (2002) that cam failed at 100k. The car was serviced by the owner and he has used castrol longlife 506.01 to 507.00 since day one. So it seems some have weak cams and not totally down to the oil.
The argument some people is those oils are causing problem and the oil to use is the 5w40 505.01 do to ZDDP levels
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Old March 4th, 2009, 17:29   #2
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If you go through the cases that have been identified thus far, there are some cases where the owner has been using 506.01 or 507.00 oils. There are still nowhere near enough cases to draw any conclusions, but for an engine with flat-tappet lifters, the (A) lower viscosity and (B) lower content of known extreme-pressure additives (ZDDP) on the 506.01 and 507.00 oils ain't heading in the right direction. Once again, DON'T draw any conclusions, but the use of 506.01 or 507.00 oils can't be EXcluded yet as a contributing factor, either.
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Old March 5th, 2009, 02:16   #3
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Well when i had my PD 130 i used the same oil from new 506.01 then 507.00. The new owner of the car has 211k and the cam is still fine. My bet at this stage is some cams have a weakness and using the wrong oil is certainly asking for problems.
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Old March 5th, 2009, 09:46   #4
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We've had previous requests from the original poster to keep this thread for data collection only ... perhaps we should get back on track and leave the discussion for other threads (already did one clean-up to fix this). Any other entries?
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Old March 26th, 2009, 17:27   #5
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Quote:
Originally Posted by SBAtdijetta
GoFaster: Another 505.01 oil only car looking bad; a 5w30 one too. Sorry for the non data post.
bolded text = hypothetical problem area ...

(BTW I don't think it's the "5w30" that is the problem, it is the different additive chemistry that came along with it)
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Old March 27th, 2009, 10:14   #6
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Quote:
Originally Posted by GoFaster
(BTW I don't think it's the "5w30" that is the problem, it is the different additive chemistry that came along with it)
5w30 was not my intent either, just that the 5w30 oils seem to be the "emissions friendly" low ash/saps ones with different additive packages.
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Old March 27th, 2009, 10:40   #7
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I guess when the PD testing was done at VW, a 130,000 mile cam failure would have been seen as an acceptable failure! That response from VW does suck, though. I want my cam and lifters to go 300,000 miles plus. That, I would feel is acceptable.

--Nate
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Old April 1st, 2009, 05:05   #8
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The VW 506.01, extended life oils actually have a HIGHER additive treat level than either the VW 505.01 or VW 507.00 products. However in order to achieve the SAE 0w-30 grade you have to using a thinner (lower molecular weight), basestock blend which offers inherently poor protection against scuffing wear in the valvetrain. For example, a 10w-30 will typically provide better high temp protection, less volatility and better shear stability than a 0w-30 - even if the HT/HS viscosity of the two oils is identical.

Every oil formulation is a compromise in terms of physical/chemical properties.
The VW 506.01 oils were primarily developed for high fuel
efficiency, hence they're formulated on the thin side and offer less wear protection than an SAE 5w-40....

TS

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Old April 1st, 2009, 18:31   #9
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What cylinder was affected? Were the bearings all equally worn?
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Old April 2nd, 2009, 12:02   #10
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Another one bites the dust:

http://forums.tdiclub.com/showthread.php?t=243655
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Old April 2nd, 2009, 13:15   #11
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Quote:
Originally Posted by 2footbraker
What cylinder was affected? Were the bearings all equally worn?
Cyliner #1 (the lobes nearest the T-belt). All the bearings were pretty well worn, but the one at the pump end was the worst, there is some bending of the cam or something going on because the wear was not symmetrical...more on the outside of the bearing. The lifters were worn but none were near failure.

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Old April 2nd, 2009, 14:15   #12
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Thanks for the pic. Hmmm, followers actually look pretty good. Is the chamfer gone off the lobe tips?
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Old April 2nd, 2009, 14:50   #13
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just that one set of lobes closest to the T-belt, chamfer gone completely. Others were pretty much ok. I took measurements and there was about 0.10 mm diff between the first set of lobes, and the other three.
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Old April 2nd, 2009, 18:45   #14
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Thanks for the measurement. Was the wear on both lobes about equal?
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Old April 2nd, 2009, 18:46   #15
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Getting off topic again...
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