Question about 2000 Harley Davidson FXST Softail Standard

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2000fxst 44000miles it is developing a motor vibration above 2500rpm I am concerned with the balancing shafts and chain assembly.what is normal wear time and replacement?

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You may want to check all of you engine mouting bolts to make sure they are torqued correctly. As to the shafts and chain they are really only replaced when out of limits. I would be very surprised if they were out of limits and the only problem. While I have not seen every 88B motor....we rebuild them and most often don't replace those items. Hope this helps.

JP

Posted on Sep 04, 2009

Testimonial: "Thank you for your response. I have never checked the motor mounts. And probibly would not have until I pulled the entire motor! Thank You"

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tdisline_456.jpg


Either the shaft driving the pump from the balance shaft rounds off or the balance shaft drive gears eat themselves.
The same issue ... low oil pressure warning light, noisy rattling engine, and the turbo has gone. Diagnosis: oil pump balancer shaft assembly ...


tdisline_457.jpg

tdisline_458.jpg
tdisline_459.jpg tdisline_460.jpg tdisline_462.jpg tdisline_463.jpg
Many 2.0 TDI engines show excess chain noise and wear anywhere from 50,000-100,000+ miles. Cars have broken the chains/tensioner as low as 65,000 miles. This is just a range of cars that have been reported, diagnosed, and repaired. The actual statistics on dealer repairs or failures is unknown and I've heard cars over 100,000 miles that, in my opinion as a non mechanic (most mechanics wouldn't recognize this sound and problem either), aren't noisy. From what has been reported, noticeable noise/chain-tensioner wear/greater risk of breaking is around 60,000-150,000 miles. Your case may vary. The most obvious symptom is a rattling loose noise from the oil pan. Unless you listen to a Passat TDI with a tight chain and one with a loose chain, it's hard to describe the difference other than rattling chain noise.
The reason the gear drive oil pump modification was started is because a few mechanics who specialize in TDI have seen many worn oil pump chains/sprockets/tensioners. There will always be a few defective parts that come off the assembly line and all mechanical components like chains wear out sooner or later, but in my opinion, the failure rate is abnormal considering the number of Passat TDI sold versus the number of reported oil pump failures. This does not necessarily mean that every or even most Passat TDI will have this problem, just that the reported failure rate is high enough to consider this part a design failure. Nobody, not even VW-Audi knows the average time between failure for these parts and the percentage of cars that will have this problem, but they changed this design and if you want to not have this specific failure, the only sure way is to swap to the geared module.


tdisline_464.jpg

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Remove the oil pan and the oil pump & balancer shafts assembly.

tdisline_448.jpg
Either the shaft driving the pump from the balance shaft rounds off or the balance shaft drive gears eat themselves.
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tdisline_454.jpg
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