Replacing Mains without pulling motor?
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Senior User
Joined: Apr 2007
Posts: 107
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From: Greenville, KY
Replacing Mains without pulling motor?
1989 F-150 4x4 4.9L
Is it very hard to replace the mains & rods bearings with motor still in trk?
I know all about jacking up the motor to remove the pan. Done that twice on 2 other trks to replace oil pumps. What I really want to know is how hard it is to slide the upper bearing out from the crank. Do they come out fairly easy?
Thanks, James
Is it very hard to replace the mains & rods bearings with motor still in trk?
I know all about jacking up the motor to remove the pan. Done that twice on 2 other trks to replace oil pumps. What I really want to know is how hard it is to slide the upper bearing out from the crank. Do they come out fairly easy?
Thanks, James
Tuned
Joined: Jul 2007
Posts: 338
Likes: 1
From: Barbourville Ky
I second this suggestion.Possible yes,,very smart or easy NO
Senior User
Joined: May 2006
Posts: 222
Likes: 0
From: Edmonton, AB
I would not recommend that you attempt this. I've been party to attempts like this when I was in the used car business. 100% failure rate (at least with us) after a short period of time if you use this method.
Post Fiend
Joined: Jan 2005
Posts: 8,402
Likes: 10
To answer your question all you have to do is put something like a flat head nail or bent piece of wire into the oil hole in the crank journal and rotate the crank to turn the bearing shell out. Is it wise? That`s up to you.
Senior User
Joined: Jan 2008
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More Turbo
Joined: Nov 2007
Posts: 578
Likes: 12
I've done it many times on big trucks, and heavy equipment. Very tight space to work in on these pick ups. If you can get the pan off and get the caps off it can be done.
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Senior User
Joined: Mar 2008
Posts: 400
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im with all the others,
ive witnessed a few of these done and they all failed, some a few days others a few weeks
better off to pull it and do a rebuild if ya want lasting results
ive witnessed a few of these done and they all failed, some a few days others a few weeks
better off to pull it and do a rebuild if ya want lasting results
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