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Timing Chain has jumped

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Old 11-30-2008 | 02:49 PM
  #1  
JayM's Avatar
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Joined: Oct 2008
Posts: 90
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Year: 1991
Model: Cherokee
Engine: 4.0
Default Timing Chain has jumped

Ok guys - I think this is my issue, my neighbor is uot of town and he borrowed my timming gun, o I am not sure yet. Tell me what you think.

I have spark, and fuel in the rail, she turns over without an issue.
kind of sputters without starting.
The CPS checks out good (followed the write up - Thanks Guys)

BTW I would love to meet the engineer who put the timing lock down bolt ina nice position where youcan not get a socket on it, and a wrench is blocked by the motor mounts. What an idiot.
I need a 13mm crows foot to get that loose of couse I don't have one.

1) what do you all think? Timing chain?
2) How tough a job is this?
3) does the engine need to come out to replace it?
and here is the nice question...

4) what perfromance upgrade would you do while putting in a new chain?

Of course that is assuming that the valve train has not been destroyed by a jumped chain.

Thanks
Old 11-30-2008 | 03:19 PM
  #2  
double_ot_xj's Avatar
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Joined: Nov 2008
Posts: 429
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From: Blairsville, PA
Year: 2000
Model: Cherokee
Engine: 4.0L home brew Snorkle
Default

heres what i think. go to sears and get a metric box and open set, maybe the ones that ratchet. then call your neighbor and yell at hime for not returning your tool before he left town.

performanct upgrade: you can put a 4.2 cam in while your at it. you will need to take the chain off to do this anyway, so nows your chance
Old 11-30-2008 | 03:27 PM
  #3  
JayM's Avatar
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Year: 1991
Model: Cherokee
Engine: 4.0
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I was planing on blowing 6psi of boost into her one day, the SC is on the shelf int he garage.

I's either this or a Cummins 4BT transplant, and sell the 4.0.

Not sre how big of a project I want right now.
Old 11-30-2008 | 03:52 PM
  #4  
Metmknice's Avatar
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Joined: Oct 2008
Posts: 2,127
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From: Hell, CA
Year: 1989
Model: Cherokee
Engine: 4.0L I6
Default

Go with a 4BT.. or make it a 4.6L stroker
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