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Unread 04-14-2010, 09:13 AM   #1
bharris68
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4.0 Flywheel Alignment ... Critical???

Working on replacing the clutch in my friends 1992 4.0 AX-15 equipped Cherokee - I pulled the flywheel down to press a new bearing in, thinking that it was like my 2.5L - lo and behold the bearing is pressed into the crank, ick!

I can deal with that based on the threads here but my fear here is that I did NOT mark the position of the flywheel vs. the crank before I popped it down!!! I did my best there when I got it back up..

I marked the freaking bolts - but not the flywheel and crank.. Genius...

looking over a few threads here, I'm a little scared that I'm going to have to open the tranny and engine over and over to readjust it... However, I'm wondering if the engine computer will look at the position of the flywheel and then just balance out the fact that it's the factory flywheel and the tone windows are the same, it will just need to adjust the timing?????

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Unread 04-14-2010, 01:40 PM   #2
AZ Jeff
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If the flywheel is position sensitive, there two methods used commonly:

1. one bolt (or more) is offset from the others, thus preventing installation in more than one position.
2. one or more dowel pins will be used, with an offset pattern, to locate the flywheel.

If you do not see those, assume it is not position sensitive.
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Unread 04-14-2010, 02:40 PM   #3
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Quote:
Originally Posted by AZ Jeff View Post
If the flywheel is position sensitive, there two methods used commonly:

1. one bolt (or more) is offset from the others, thus preventing installation in more than one position.
Yes. AMC-patterned cranks have asymmetrical patterns so that the flywheel (or flexplate in the case of an automatic) only goes on one way for proper counterweight clocking purposes.
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Unread 04-14-2010, 10:17 PM   #4
bharris68
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Yep - final word - THANK HEAVEN it is ONLY possible to put it on one way! Success!! Then... the clutch PEDAL broke... New thread for that...
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4.0 , cps , flywheel , timing
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