Timing
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Joined: Jun 2017
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From: Yakima, WA Pacific Northwest
Year: 1990
Engine: 4.0 renix
CF Veteran
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Posts: 47,923
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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From: In a large sandbox
Year: 1998
Engine: 4.0
Just for future reference:
http://www.pacificcoastmanuals.com/1...ce_manual.html
It may be the best investment you make in the XJ for the money.
http://www.pacificcoastmanuals.com/1...ce_manual.html
It may be the best investment you make in the XJ for the money.
Thread Starter
Member
Joined: Jun 2017
Posts: 159
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From: Yakima, WA Pacific Northwest
Year: 1990
Engine: 4.0 renix
Thread Starter
Member
Joined: Jun 2017
Posts: 159
Likes: 0
From: Yakima, WA Pacific Northwest
Year: 1990
Engine: 4.0 renix
CF Veteran
Joined: Nov 2015
Posts: 2,856
Likes: 201
From: syracuse ny
Year: 1997
Model: Grand Cherokee (ZJ)
Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims
PS- Whatever you do, please don't take the dizzy OUT. If you have already, let us know. If you haven;t good you should be up and running soon following the above
Last edited by 97grand4.0; Apr 9, 2018 at 11:04 AM.
Thread Starter
Member
Joined: Jun 2017
Posts: 159
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From: Yakima, WA Pacific Northwest
Year: 1990
Engine: 4.0 renix
You're missing the point. 4 stroke engine, intake, compression, power, exhaust. So you ARE at TDC when the dots aligned, ..twice. Once at TDC of the compression stroke, where the plug is firing, (the one you are looking for) and once at TDC of the exhaust stroke, where the intake stroke is ready to start .(exhaust valve is closing, intake is opening.) Both will line up the dots. You want the distributor to point at #1 at TDC of the COMPRESSION stroke. So you have to spin the crank around until the intake AND exhaust valves of #1 are closed alll the way up to the point where the dots align AND the dizzy is pointing at #1. That is TDC of the ignition, or power, stroke. Hope this heps
Thread Starter
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Joined: Jun 2017
Posts: 159
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From: Yakima, WA Pacific Northwest
Year: 1990
Engine: 4.0 renix
and I know this because when I line them up and I look down the spark plug hole I can see the piston not flush. Its receded inside the block on the way down
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Joined: Nov 2015
Posts: 2,856
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From: syracuse ny
Year: 1997
Model: Grand Cherokee (ZJ)
Engine: 4.0, new lifters valve job with new springs and exhaust valves, preload set with shims
Not likely unless the keyway fell out. 99 times out of 100 if you never did this before, this is what it is. Just be patient, follow those steps.
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Joined: Jun 2017
Posts: 159
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From: Yakima, WA Pacific Northwest
Year: 1990
Engine: 4.0 renix
alright I'll get it put together this afternoon after work and let you guys know how I did. thanks for your time knowledge and patience.
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Member
Joined: Jun 2017
Posts: 159
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From: Yakima, WA Pacific Northwest
Year: 1990
Engine: 4.0 renix
U guys were right (doubt that's a surprise) I lined up the gear marks and it was right at tdc..used the screwdriver method (I'll be using that from now on to find tdc) but I got the new timing set on dot to dot at tdc and 15 pins with the cam mark at 3 and the crank mark at 6. Feeling confident I got it on right. Going to button it up tomorrow thanks again for ALL the help u guys are awesome.
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Remember turn to no 1 compression stroke to install dizzy. Or next thread will be Install dizzy wont start backfiring.