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Unread 06-17-2006, 08:48 PM   #1
eagleknight
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1997 ZJ 
 
Join Date: Jun 2004
Location: Ohio
Posts: 144
Timing Chain

Is there a recommended time to change the timing chain on a 4.0L. I know for timing belts it is around 60k. I have 175,000 on my 97 GC with no problems. This was brought up in a conversation at a family get together tonight. It got me wondering.

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Unread 06-17-2006, 08:49 PM   #2
ArloGuthroJeep
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2004 WJ 
 
Join Date: Mar 2005
Location: Boulder, CO
Posts: 23,082
This has been asked before (don't remember the answer) but try searching for it in this forum or the TJ forum.

Audi: Replace timing chain every 60,000 miles
Jeep: You get to ask at 175k if you even need to do it...I don't hear of many people changing it
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Unread 06-17-2006, 08:53 PM   #3
GreenDean
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1995 ZJ 
 
Join Date: Feb 2005
Location: New Jersey, Exit 105
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ug... dont do it if it runs fine.

I've replaced a couple chains on high milage engines and ended having to do lifters and a cam just to get the vavle train back in sync.
Loose chains and worn vavle trains are happy together.

Its like if you give a 90 year old man a 20 year old girl to have sex with.... you'll kill him.

If it aint broke.. dont fix it.
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Unread 06-17-2006, 08:56 PM   #4
sk8142
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1994 XJ Cherokee 
 
Join Date: Jun 2006
Location: Pullman, WA
Posts: 329
do the jeeps have plastic chain guides? Are the tensioners oil fed? (tensioned)

I have done quite a few timing chain jobs on my nissan's and they always have the damn plastic chain guides...
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Unread 06-17-2006, 11:07 PM   #5
GreenDean
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1995 ZJ 
 
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Location: New Jersey, Exit 105
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No guides or tensioners.

Just a chain.

Here in America we build things right.
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Unread 06-17-2006, 11:22 PM   #6
John in MA
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1994 ZJ 
 
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Location: MA, USA
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No kidding. The only thing to break on my '85 Caravan was the Mitsubishi engine. Darn plastic chain guides.
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