Cam chain tensioner liner - BMW Luxury Touring Community
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post #1 of 3 Old Dec 13th, 2014, 6:51 pm Thread Starter
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Join Date: Jun 2002
Location: The Deep South of Vermont
Posts: 4,395
Cam chain tensioner liner

This is an item the BMW recommends replacement at reqular intervals.
Folks on this site over the years have observed that the cam chain tensioner liner seems to hold up pretty well and doesn't need replacement often.

Here's mine at 95K miles. There is an area of wear, but it isn't an area of the liner that can be easily seen without removal of the timing chain cover.

The only visible wear is at the end of the tensioner liner next to the drive sprocket on the crankshaft. The plastic is worn and rough over a length of 1-2 inches.

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post #2 of 3 Old Dec 13th, 2014, 8:41 pm
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Location: Dandridge (Near Knoxville), TN, USA
Posts: 12,165
Re: Cam chain tensioner liner

I have said in the past that I thought the replacement interval should be 100,000 miles based on what I saw on mine. That wear is about what I would expect.

About a year ago I replaced the timing chain guides on my BMW 740iL, at about 175,000 miles, and they looked pretty good still, but had hardened and the retaining tabs broke when I was removing them. I think that it the most important, replace them before they start breaking up. I feel that is the most likely failure mode.

I don't want to achieve immortality through my work...I want to achieve it through not dying.

David Shealey
Dandridge, TN
EX: '01 Black LT, BAT BYKE (Totaled at 110,000 miles)
IBA SS, BB, BBG, 10/10ths.
No bike now, but maybe in the future.
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post #3 of 3 Old Dec 14th, 2014, 7:30 am
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Join Date: Feb 2003
Location: Stroudsburg, PA, USA
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Re: Cam chain tensioner liner

Agree . My 02 LT had 90 K on the guides when replaced.The guides do become brittle and discolor.

Pete Murray
IBA # 359 and
2014 RT
1973 R75/5
2002 LT 171 K Gone
2008 FJR 36 K Gone
Stroudsburg, PA
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