timing chain rattle

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Rovinh - 06 Nov 2005 03:24 GMT

I have a 1998 Ford Explorer with an overhead cam. The timing chain
rattles. When it's cold it is very loud and when it warms up it quiets
down some. What could be causing the rattle?

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Ulysses - 06 Nov 2005 05:32 GMT

> I have a 1998 Ford Explorer with an overhead cam. The timing chain
> rattles. When it's cold it is very loud and when it warms up it quiets
> down some. What could be causing the rattle?

The 4.0 SOHC engine from that period is notorious for timing chain problems.
I suggest you search google.com for "explorer timing chain." You should
find plenty of info.

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johanb - 06 Nov 2005 16:14 GMT

Bad tensioned or broken timing cassette

check if you have the "updated" tensioner
old one is "flush" with the head, new one has cylinder type 1" long thingy
on it

Also, when cold, remove oil filler cap and look inside with flashlight, you
should see tensioner guide move, if not, cassette is broken

> I have a 1998 Ford Explorer with an overhead cam. The timing chain
> rattles. When it's cold it is very loud and when it warms up it quiets
> down some. What could be causing the rattle?

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