Author Topic: 6.9 Timing Chain Going Out?  (Read 112 times)

john erbe

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6.9 Timing Chain Going Out?
« on: 05 September 2020, 07:39 AM »
Have an intermittent rotating noise up in that area but hard to pinpoint. Is there a telltale sign/noise that indicates that a chain is going out?

daantjie

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Re: 6.9 Timing Chain Going Out?
« Reply #1 on: 05 September 2020, 08:10 AM »
The 6.9 has a ratcheting tensioner so it would be unlikely that you are getting chain slap on the inside of the valve covers I would say.
Best bet would be to pull the valve covers and have a gander.  If you can easily lift the chain off the sprockets with your fingers then for sure the chain is clapped out.
Daniel
1977 450 SEL 6.9 - Astralsilber

TJ 450

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Re: 6.9 Timing Chain Going Out?
« Reply #2 on: 08 September 2020, 08:43 AM »
If the chain is worn beyond the range of the tensioner you might get a noise. It’s easily checked with the valve cover off though of course.

Tim
1976 450SEL 6.9 1432
1969 300SEL 6.3 1394
2003 ML500