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#4046750 - 02/08/20 09:51 AM Re: Timing chain questions [Re: IPreferDIY]
Davidzq Online   happy
Member

Registered: 01/19/15
Posts: 136
Loc: Seattle, WA
Originally Posted By IPreferDIY

I remember seeing something about the problem relating to a bad batch of nylon on the tensioner arms, but I don't recall where that was from or whether it was the definitive issue. I remember the TSB saying "some", so that might be consistent with the bad batch view.

There was a recall issued for the 2003 model year due to bad tensioners. They would be replaced by the dealer.
A series of dots and an x on marked on the front of the valve covers indicates this recall has been completed.
_________________________
David Hensley
Member of Northwest Panthers Car Club

2007 P71, Norsea Blue SAP
-Jmod
-Message Center cluster retrofit
-All interior lighting converted to blue
-Lincoln towncar seats, heated and power passenger
-Self installed Compustar remote start/security
-Full dynamat install
-Full interior swap from tan to charcoal
-Trailer hitch/light controller/AirLift assist bags
-Headlight relay mod

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#4046760 - 02/08/20 01:17 PM Re: Timing chain questions [Re: Davidzq]
IPreferDIY Offline
Over the Hill

Registered: 05/12/15
Posts: 1082
Loc: Canada
Here's a link with the content of the TSB included:

https://www.crownvic.net/ubbthreads/ubbthreads.php?ubb=showflat&Number=218164

This suggests a problem with the arms themselves rather than the tensioners, but it's still not definitive. I remember reading about the markings being done but don't recall the details. I'm guessing they did a mad scramble to correct what they could when they first figured out the issue.
_________________________
2000 Grand Marquis LS HPP, a hand-me-down in 2008 with 128,000 km; 180,000 km as of May 2015
mods: air filter box "tuba" (in place of the "trumpet"), headlight relay harness, J-mod (around 186,350 km), 70mm throttle body

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#4046948 - 02/10/20 03:03 PM Re: Timing chain questions [Re: Old_Guy_Stu]
KYF350 Offline
Climber

Registered: 09/10/07
Posts: 933
Originally Posted By Old_Guy_Stu
The anti-drainback valve is just a flap of rubber at the inlet. Since it's part of the filter spec, any halfway-decent aftermarket filter will have it as well.

My dad worked for the local Ford dealership in the late '60's/early '70's. When I started driving he spoke of an anti-drainback valve that was supposed to minimize hammer on startup. Thanks for your reply, Craig.
_________________________
2005 Ford Excursion Eddie Bauer, 4X4, True Blue/Arizona Beige, 6.0 liter PSD, all bells and whistles, 30mm Ford rear anti-sway bar.
2005 Ford F-350 Superduty, 4X4, 6.0 liter PSD, Red, SC, SRW, Lariat, B&W Turnover hitch, all bells and whistles.
2004 Ford Crown Victoria LX Sport, Dark shadow grey, SOLD.
1996 Mercury Grand Marquis LS, Mocha, HPP, 173A package, traction assist. Mom's car.

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#4046950 - 02/10/20 03:05 PM Re: Timing chain questions [Re: gDMJoe]
KYF350 Offline
Climber

Registered: 09/10/07
Posts: 933
Originally Posted By gDMJoe
Quote:
Old_Guy_Stu - The anti-drainback valve is just a flap of rubber at the inlet.

The quality filters will have a heat resistant silicone value rather than nitrile/rubber (which is prone to harden with heat).

Another factor is not having a dome-end pressure relief valve (which may allow contaminants back into the engine).

Quote:
Since it's part of the filter spec, any halfway-decent aftermarket filter will have it as well.

Depends upon what you consider halfway-decent ... Most wouldn't qualify. *.below

Would only recommend Motorcraft, WIX, and NAPA GOLD | SLIVER (which are made by WIX)

----------


  • *In case the image is a no-show ... <PIC>




Thanks for your reply, Craig.
_________________________
2005 Ford Excursion Eddie Bauer, 4X4, True Blue/Arizona Beige, 6.0 liter PSD, all bells and whistles, 30mm Ford rear anti-sway bar.
2005 Ford F-350 Superduty, 4X4, 6.0 liter PSD, Red, SC, SRW, Lariat, B&W Turnover hitch, all bells and whistles.
2004 Ford Crown Victoria LX Sport, Dark shadow grey, SOLD.
1996 Mercury Grand Marquis LS, Mocha, HPP, 173A package, traction assist. Mom's car.

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#4046952 - 02/10/20 03:11 PM Re: Timing chain questions [Re: IPreferDIY]
KYF350 Offline
Climber

Registered: 09/10/07
Posts: 933
Originally Posted By IPreferDIY
Originally Posted By Fordiesel69
... The 2000 thru 2003 also had metal block hydraulic tensioners, with very poorly made tensioner arms that fell apart. The chain will wear thru the aluminum quickly, and then into the steel / chrome plunger. ...

I remember seeing something about the problem relating to a bad batch of nylon on the tensioner arms, but I don't recall where that was from or whether it was the definitive issue. I remember the TSB saying "some", so that might be consistent with the bad batch view.

Awhile ago, I got a pair of Cloyes tensioner arms from RockAuto on clearance, and they ended up having the original casting number but had something like a 2011 date on the box. I contacted someone at Cloyes who said the casting was the same even after the upgrade, so that would seem to lend support to a problem with the nylon itself.

I've read about people having issues even in the absence of any obvious sound, so I've been checking my oil and oil filter after oil changes. Unfortunately, I read a post recently in which someone mentioned not having any apparent problem with the old oil or oil filter despite obvious wear in the tensioner arms.

Since my last oil change, I have heard a 'sewing machine' sound that varied with RPM on at least two occasions for brief periods after cold starts, so I might be due at <130,000 miles. I remember seeing one in a U-pull yard that was showing obvious wear around 70,000-80,000 miles.

Anyone know how long they can go in the absence of a defect? I would think replacing at least the tensioner arms at 370,000 miles would be good preventive maintenance if the valve covers are already off.

I agree. Thanks for you reply, Craig.
_________________________
2005 Ford Excursion Eddie Bauer, 4X4, True Blue/Arizona Beige, 6.0 liter PSD, all bells and whistles, 30mm Ford rear anti-sway bar.
2005 Ford F-350 Superduty, 4X4, 6.0 liter PSD, Red, SC, SRW, Lariat, B&W Turnover hitch, all bells and whistles.
2004 Ford Crown Victoria LX Sport, Dark shadow grey, SOLD.
1996 Mercury Grand Marquis LS, Mocha, HPP, 173A package, traction assist. Mom's car.

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#4046954 - 02/10/20 03:14 PM Re: Timing chain questions [Re: TheCableGuy]
KYF350 Offline
Climber

Registered: 09/10/07
Posts: 933
Originally Posted By TheCableGuy
My car in my sig has allot of idle hours.... (see sig) and I don’t think my timing chain area has been messed with. I only get a little clatter on startup for about 10 seconds or less. I have been dreading the day I have to do this.. if it ever makes it that far.
My car doesn't clatter at all, I just thought with the miles it may need to be replaced. Thanks for your reply, Craig.
_________________________
2005 Ford Excursion Eddie Bauer, 4X4, True Blue/Arizona Beige, 6.0 liter PSD, all bells and whistles, 30mm Ford rear anti-sway bar.
2005 Ford F-350 Superduty, 4X4, 6.0 liter PSD, Red, SC, SRW, Lariat, B&W Turnover hitch, all bells and whistles.
2004 Ford Crown Victoria LX Sport, Dark shadow grey, SOLD.
1996 Mercury Grand Marquis LS, Mocha, HPP, 173A package, traction assist. Mom's car.

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#4046956 - 02/10/20 03:15 PM Re: Timing chain questions [Re: watkd]
KYF350 Offline
Climber

Registered: 09/10/07
Posts: 933
Originally Posted By watkd
Originally Posted By Fordiesel69
The curved guides that hold tension on the chains will wear thru to the steel plunger on the tensioner block.

BTW, the 1996 was not a problem year. 2000 - 2003 was.


A panther platform vehicle outside the 2000-2003 years are not exempt from timing chain issues. The parts will wear with usage.

Thanks for your reply, Craig.
_________________________
2005 Ford Excursion Eddie Bauer, 4X4, True Blue/Arizona Beige, 6.0 liter PSD, all bells and whistles, 30mm Ford rear anti-sway bar.
2005 Ford F-350 Superduty, 4X4, 6.0 liter PSD, Red, SC, SRW, Lariat, B&W Turnover hitch, all bells and whistles.
2004 Ford Crown Victoria LX Sport, Dark shadow grey, SOLD.
1996 Mercury Grand Marquis LS, Mocha, HPP, 173A package, traction assist. Mom's car.

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