replaced timing chains due to wear? - TCCoA Forums
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post #1 of 10 (permalink) Old 11-03-2007, 01:14 AM Thread Starter
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replaced timing chains due to wear?

Has anyone had to replace the timing chains and/or tensioners in your 4.6? I'm curious to see what symptons anyone has experienced.

1995 Cougar XR7 4.6
1997 Thunderbird LX 4.6
1977 Country Squire 460
1985 Capri RS 5.0, 5spd
1997 Thunderbird 4.6
1984 Capri RS 5.0,5spd
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post #2 of 10 (permalink) Old 11-03-2007, 05:02 AM
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Im now running 140k on factory chains and gears with stage 2 cams(for 3 years now). Everything is still doing good.

2x95 cougars to the scapper
97 F250 psd 4x4 dd twin charged
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post #3 of 10 (permalink) Old 11-03-2007, 09:23 PM
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on one of the mustangs I did a PI swap on we had to replace the chains and guides, chains had a lot of play in them when they were off of the engine, and before we did the swap it was making a griding sound behind the timing cover, the guides were down to bare metal, so how one of the guide bolts was missing, probably what caused the excessive wear

-1996 Pearl White Thunderbird 4.6 Sport 4v with many mods:
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Last edited by Chris_Murder; 11-03-2007 at 09:30 PM.
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post #4 of 10 (permalink) Old 11-03-2007, 09:28 PM
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mind stock npi at tear down at 196k miles only shows minimal wear on the chain guide.

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post #5 of 10 (permalink) Old 11-03-2007, 10:40 PM
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My mechaninc says these timing chains are not supposed to ever need replacing unless some other part causes the failure. . . for example. . .if your guide rails fail.
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post #6 of 10 (permalink) Old 11-04-2007, 06:30 PM
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Only need to replace the chains if the guides are worn to metal IMHO. I always replace the curved guide and always use the cast iron tensioners.
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post #7 of 10 (permalink) Old 11-13-2007, 11:27 AM
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I had to replace the passenger side tensioner after doing the PI cam swap it did not pump up, had to take the hole thing apart again to....crap.....
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post #8 of 10 (permalink) Old 11-13-2007, 11:39 AM
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My chains are doing well at 262k miles.
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post #9 of 10 (permalink) Old 11-13-2007, 01:05 PM
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Never heard of a set going bad... Unless as has been mentioned something else fails and causes it. I had to replace a set of heads on mine (long story) but still use the original tensioners, guides, and chains. they showed little if any wear.

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post #10 of 10 (permalink) Old 11-13-2007, 02:10 PM
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278K on my crown vic, and the timing cover has never been off the motor.

-91 Cougar LS, coming soon, complete overhaul with a 427" Windsor.
-90 XR7 5-speed black on black w/sunroof, MP2, coated rotors, double intercooler, 15%OD, ported heads, comp stage 1 cam, 85mm TB, 90MM LMAF, 80# injectors, and ported big valve heads
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