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#4547511 - 10/18/17 07:22 PM Replace timing chain or no?
dlundblad Offline


Registered: 09/30/13
Posts: 9998
Loc: Indiana
I finally had a chance to rent a puller and get the harmonic balancer and timing chain cover off my Jeep due to a weeping timing chain cover gasket.. The chain is pretty sloppy.

My book says anything over 1/2" of play and it should be replaced, but I have read online that the chain should last the life of the engine. What is one to do? (The whole front end of the Jeep is removed at the moment. Plenty of room to work.)

The Mopar chain is about $40. I am not thinking anything else should be replaced.
_________________________
03 Jeep WJ 4.0 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 145k Rotella T5 10w30 Fram TG3980


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#4547516 - 10/18/17 07:25 PM Re: Replace timing chain or no? [Re: dlundblad]
TheKracken Offline


Registered: 04/18/17
Posts: 515
Loc: Fort Worth TX
If it is not very hard to replace and only 40$, I would just do it. Unless you plan to get rid of it sooner rather than later?
_________________________
2011 Prius 96k miles RLI 5w20
97 Toy T100 4x4: amsoil 0w20 242k Miles
04 Toy Sienna awd: Pennzoil 0w20 281k Miles

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#4547519 - 10/18/17 07:28 PM Re: Replace timing chain or no? [Re: dlundblad]
OneEyeJack Offline


Registered: 09/14/10
Posts: 7471
Loc: S California
You might need to check the guide(s) and tensioner, too.

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#4547521 - 10/18/17 07:29 PM Re: Replace timing chain or no? [Re: dlundblad]
Nick1994 Offline


Registered: 02/19/13
Posts: 10097
Loc: Phoenix, AZ
Iíd replace it.

I had mine replaced 2 years ago at about 135k miles. It was randomly stalling and set a cam position sensor code. My mechanic found that the distributor was bad and chewed up the cam sensor inside. He replaced the distributor and then it set a misfire code (distributor isnít adjustable on a 4.0L). Found that the timing chain was real sloppy (he put a socket on the end of the crank and turned and it took a while of turning until the distributor moved). New timing chain and itís been golden.
_________________________
2015 Hyundai Sonata 2.4L 79k PU 5w30 & OEM
2000 Toyota Camry 2.2L 228k M1 AFE 0w30 & Wix
1996 Jeep Cherokee 4.0L 146k M1 HM 10w40 & Fram Ultra

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#4547525 - 10/18/17 07:33 PM Re: Replace timing chain or no? [Re: Nick1994]
bbhero Online   content


Registered: 03/20/15
Posts: 4611
Loc: Virginia
+1 to what Nick1994 said and what Oneyejack said as well. Go big or go home smile good luck with it. I know you will do good work with it.


Edited by bbhero (10/18/17 07:34 PM)

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#4547531 - 10/18/17 07:39 PM Re: Replace timing chain or no? [Re: OneEyeJack]
StevieC Offline


Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
Replace the chain, you are already in there... And

Originally Posted By: OneEyeJack
You might need to check the guide(s) and tensioner, too.


+1


Edited by StevieC (10/18/17 07:40 PM)
_________________________
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

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#4547534 - 10/18/17 07:43 PM Re: Replace timing chain or no? [Re: dlundblad]
anndel Offline


Registered: 05/28/09
Posts: 245
Loc: Hawaii, USA
Replace it, you'll sleep better at night. wink

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#4547543 - 10/18/17 07:47 PM Re: Replace timing chain or no? [Re: dlundblad]
dlundblad Offline


Registered: 09/30/13
Posts: 9998
Loc: Indiana
Originally Posted By: StevieC
Replace the chain, you are already in there... And

Originally Posted By: OneEyeJack
You might need to check the guide(s) and tensioner, too.


+1


There's a rubber guide inside the cover, but that's it.


Edited by dlundblad (10/18/17 07:47 PM)
_________________________
03 Jeep WJ 4.0 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 145k Rotella T5 10w30 Fram TG3980


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#4547551 - 10/18/17 07:49 PM Re: Replace timing chain or no? [Re: dlundblad]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
You should replace the cam and crank sprockets too---otherwise, the teeth are a little worn and your brand new chain would have to "wear in" to the sprockets. You'd be wearing your new chain out faster. I don't know why they don't come as a set---pretty dumb not to have them available as a set.

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#4547556 - 10/18/17 07:50 PM Re: Replace timing chain or no? [Re: dlundblad]
StevieC Offline


Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
Sorry wasn't sure which Jeep. smile
_________________________
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

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#4547562 - 10/18/17 07:51 PM Re: Replace timing chain or no? [Re: TheKracken]
Rolla07 Offline


Registered: 11/05/11
Posts: 4732
Loc: MTL, CANADA
Originally Posted By: TheKracken
If it is not very hard to replace and only 40$, I would just do it. Unless you plan to get rid of it sooner rather than later?


+1
_________________________
2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967


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#4547564 - 10/18/17 07:52 PM Re: Replace timing chain or no? [Re: StevieC]
dlundblad Offline


Registered: 09/30/13
Posts: 9998
Loc: Indiana
Originally Posted By: StevieC
Sorry wasn't sure which Jeep. smile


No reason to be sorry.

Thanks for your help.
_________________________
03 Jeep WJ 4.0 199k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 177k M1 0w40 Mahle OX149D
97 Chevy Blazer 4.3 145k Rotella T5 10w30 Fram TG3980


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#4547568 - 10/18/17 07:54 PM Re: Replace timing chain or no? [Re: dlundblad]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Bump because the OP probably didn't see my previous post.

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#4547570 - 10/18/17 07:54 PM Re: Replace timing chain or no? [Re: dlundblad]
StevieC Offline


Registered: 08/21/08
Posts: 17116
Loc: Ontario, Canada
Cheers2 Canada USA
_________________________
'15 Dodge Journey - 90,000 KM's - SSO 5w20
'06 Hyundai Santa Fe - 535,000km - SSO 0w30 (R.I.P)

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#4547572 - 10/18/17 07:55 PM Re: Replace timing chain or no? [Re: dlundblad]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Bump again because StevieC bumped his post.

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