Can the camshaft guide noise return?

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zoti - 07 Apr 2006 04:14 GMT

'98 Explorer SOHC 4X4 AT.

Had the camshaft guide replaced at 58K. Now on 82K and looks like the noise
is back. I can hear it (sound a bit like the engine is pinging) when above
2000 RPM and light load.

The ford dealer listed part# YL2Z-6M289-AA DRV ASY-C/SHFT on the service
printout I have.

I'm trying to figure out what to do. Any ideas? Maybe Jim?

Thanks,
zoti

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Kenneth J. Harris - 07 Apr 2006 14:47 GMT

I'm not an expert but I do own a '98 with the SOHC V6. My thoughts are:
1. Call or visit the dealer and tell them that the noise is back. Find
out what they will do for you if anything or what they advise.
2. As I understand it, there are two timing chain tensioners--one front
and one rear. Perhaps only the front was replaced originally and now
the rear one is failing. Or the front one has gone again. Maybe some
other component was damaged by the chain when the original tensioner was
defective, and that's the noise that's showing up now.
3. None of these possibilities sound good. Good luck.

Ken

> '98 Explorer SOHC 4X4 AT.
>
[quoted text clipped - 9 lines]
> Thanks,
> zoti

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Jim Warman - 08 Apr 2006 06:44 GMT

Kens answer is a good one and I can't think of anything to add to his take
on the concern.... Yes, there is a rear timing cassette.... yes, it can go
bad, too. Yes it could be a repeat of the front failure. Further diagnosis
is going to be required. At this point in time, it looks like there will be
no help from Ford due to the ae of the vehicle (but it never hurts to ask).

As a DIY proposition, on a scale of one to ten, I rate this as likely about
an 11... special tools and considerations need to be taken into account (I
realize that you haven't mentioned fixing it yourself, but you did let my
foot in the door).

Just to rub the bad part in (sorry, my week has been like that, too)... if
it is the rear cassette, the motor has to come out to do this job properly.

FWIW, at this point we are presupposing a concern.... we do need to be sure
of our diagnosis to prevent the replacement of good parts.

> '98 Explorer SOHC 4X4 AT.
>
[quoted text clipped - 10 lines]
> Thanks,
> zoti

Reply to this Message

zoti - 08 Apr 2006 07:13 GMT

Thanks Jim.

Was the famous timing guide recall just the front one or both?

I assume the front guide is #22 in the illustration:
http://www.trademotion.com/partlocator/index.cfm?action=getLocator&siteid=213787
&chapter=DP2028&appSectionid=10&groupid=10007&subgroupid=60236&componentid=0&mak
e=10&model=Explorer&year=1998&graphicID=T028043&callout=22&catalogid=1
but I don't see any guide for the back.

zoti

> Kens answer is a good one and I can't think of anything to add to his take
> on the concern.... Yes, there is a rear timing cassette.... yes, it can go
[quoted text clipped - 27 lines]
> > Thanks,
> > zoti

Reply to this Message

Steven Hilgendorf - 08 Apr 2006 17:18 GMT

FYI, that part number '6M289' you quote corresponds to a LH Cassette and
not the part number for the Jackshaft Chain Guide, which would be "6K254".

Steven

> Thanks Jim.
>
[quoted text clipped - 41 lines]
>>> Thanks,
>>> zoti

Reply to this Message

zoti - 09 Apr 2006 06:46 GMT

So this is the part that goes in the back of the engine and requires the
whole engine to be pulled out?

Also, looking fro this part number on fordpartsonline.com brings up: "Part
Number YL2Z6M289AA was Superseded with 4L2Z6M289AA". Is it possible that to
original part was replaced by another prone to be defective part instead of
the new, redesigned part?

Thanks,
zoti

> FYI, that part number '6M289' you quote corresponds to a LH Cassette and
> not the part number for the Jackshaft Chain Guide, which would be "6K254".
[quoted text clipped - 6 lines]
> >
> > I assume the front guide is #22 in the illustration:

http://www.trademotion.com/partlocator/index.cfm?action=getLocator&siteid=213787
&chapter=DP2028&appSectionid=10&groupid=10007&subgroupid=60236&componentid=0&mak
e=10&model=Explorer&year=1998&graphicID=T028043&callout=22&catalogid=1

> > but I don't see any guide for the back.
> >
[quoted text clipped - 35 lines]
> >>> Thanks,
> >>> zoti

Reply to this Message

Steven Hilgendorf - 10 Apr 2006 15:27 GMT

If I'm not mistaken, and quite sure someone will correct me if I am,
that particular 'superseded' part number does not indicate an updated,
redesigned, or second version part. If this was a second version part,
the extension would have changed to 'AB', 'AC', or so on, instead of
remaining the same 'AA'. I believe the first three digits of the part
number reflect nothing more then the decade and year of manufacture.

Steven

> So this is the part that goes in the back of the engine and requires the
> whole engine to be pulled out?
[quoted text clipped - 66 lines]
>>>>> Thanks,
>>>>> zoti

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JohanB - 11 Apr 2006 02:18 GMT

The "old" timing cassette was made out of plastic for the most part.
The updated 1 was made out of metal except where the chain slides over the
guide

> If I'm not mistaken, and quite sure someone will correct me if I am,
> that particular 'superseded' part number does not indicate an updated,
[quoted text clipped - 26 lines]
> >>>
> >>> I assume the front guide is #22 in the illustration:

> >>> but I don't see any guide for the back.
> >>>
[quoted text clipped - 43 lines]
> >>>>> Thanks,
> >>>>> zoti

Reply to this Message

zoti - 11 Apr 2006 06:24 GMT

OK. Thanks guys.

I have an appointment on Friday for a diagnostic at a fords dealer. We'll
see what they say.

zoti

> The "old" timing cassette was made out of plastic for the most part.
> The updated 1 was made out of metal except where the chain slides over the
[quoted text clipped - 35 lines]
> > >>>
> > >>> I assume the front guide is #22 in the illustration:

> > >>> but I don't see any guide for the back.
> > >>>
[quoted text clipped - 49 lines]
> > >>>>> Thanks,
> > >>>>> zoti

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zoti - 12 Apr 2006 18:40 GMT

It's a bit embarrassing but I think I found the source of the problem. Seems
like I was a bit low on oil. I added 2Q and now the noise seem to be gone.
I'll keep on driving to see if I can hear it again.

Thanks to all who replied.

> '98 Explorer SOHC 4X4 AT.
>
[quoted text clipped - 9 lines]
> Thanks,
> zoti

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