Quote:
Originally Posted by 87tdwagen
Try getting a mechanics stethoscope scope or long screwdriver to help pinpoint the source. It could be a timing chain guide loose or ovaled, or any of the aforementioned suggestions above. An oddbal one you can check may be a cracked EGR accordion tube also in that same general area. Really hard to guess at this one. Good luck
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Have you had luck with a stethoscope on these engines? There are so many clicks and clacks and noises that its hard even when something is noisy, to pinpoint.
I like the recommendation by Barry to remove the belt. That helped me a lot....