How to get #1 piston at TDC
03-22-2009, 04:08 PM
#4
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Year: 1989
Model: Cherokee
Engine: 4.0L I6
Remove spark plug, and either hand crank it with a breaker bar/socket, or remove the fuel pump relay and crank it til you see the top of the piston. Either way will work.
03-22-2009, 04:13 PM
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Year: 1994 1993
Model: Cherokee
Engine: 4.0
If you have a 4.0 engine it`s not hard..Basically there is a mark on the crank pulley and above the pulley there are numbered notches on a small plate...Place the vehicle in Neutral and turn the crank shaft pulley with a socket and ratchet (It won`t be hard to turn)...When the mark on the pulley is lined up with the "0" on the little metal plate the rotor on your distributor should be pointing right at the location of the #1 spark plug wire terminal..If the rotor is off by 180 degrees you are at TDC on the exhaust stroke and you need to make one more complete turn of the crank pulley...I'm sure someone will have a link to a photo step-by-step guide for this 
Last edited by Programbo; 03-22-2009 at 05:00 PM. Reason: Typing error
03-22-2009, 04:18 PM
#6
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Year: 2000
Model: Cherokee
Engine: 4.0
If you have a 4.0 engine it`s not hard..Basically there is a mark on the crank pulley and above the pulley there numbered notches on a small plate...Place the vehicle in Neutral and turn the crank shaft pulley with a socket and ratchet (It won`t be hard to turn)...When the mark on the pulley is lined up with the "0" on the little metal plate the rotor on your distributor should be pointing right at the location of the #1 spark plug wire terminal..If the rotor is off by 180 degrees you are at TDC on the exhaust stroke and you need to make on more complete turn of the crank pulley...I'm sure someone will have a link to a photo step-by-step guide for this
03-22-2009, 05:51 PM
#7
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Year: 1988
Model: Cherokee
Engine: Renix 4.0 I6
you can also depending on how hard it is to get to the number 1 cylinder sparkplug.. put a screwdriver down the hole and crank it till the screwdrivers the whole way up
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03-22-2009, 06:50 PM
#9
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Year: 1987
Model: Comanche
Engine: I6 4.0L
I got it guys we removed the plugs and belt and just turned the crank w/ a ratchet and lined it up w/ 0 worked great.
I needed to get it at TDC cause i have to install the oil pump driveshaft with the camshaft postion sensor on top
Here are a few pics.
I needed to get it at TDC cause i have to install the oil pump driveshaft with the camshaft postion sensor on top
Here are a few pics.
Last edited by XJ?2010; 03-22-2009 at 06:53 PM.
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