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Engine noise. Need help

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Old Aug 2, 2023 | 04:16 AM
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Engine noise. Need help

Hey, I have an 86 6.9 idi and it is Knocking/ticking. It doesn’t do it at all when cold, only when warm and I’ve had the RPMS high for awhile. When it idles for awhile after making the noise it quiets down some.

I’ve replaced four suspected injectors, all pushrods, even head gaskets (not for this issue).

any help would be great, here a video of it

https://youtube.com/shorts/_M-gtPm_eL8?feature=share
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Old Aug 2, 2023 | 06:42 AM
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DOH!

You can loosen the injector line nuts one at a time when it's ticking to ID the cylinder that's the likely culprit.
 
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Old Aug 6, 2023 | 10:58 PM
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I listened, sounded pretty normal to me. Sometimes the vacuum pumps can make some racket, usually when cold and quieter when warmed up.
 
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Old Aug 7, 2023 | 11:09 PM
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Manual transmission? Is it coming from the flywheel area?
 
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Old Aug 20, 2023 | 01:52 PM
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Update

A new set of lifters and push rods fixed it.
 
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