rod bearings bad? - JeepForum.com
 
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post #1 of 9 Old 01-05-2010, 06:34 PM Thread Starter
hifooy07
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rod bearings bad?

took the oil pan off to change the oil pump was checking around in there and the rods wiggle and move a little on the crank. this cant be normal? the motor wasnt knocking or anything before dropping the pan it did chatter on start up i suspected the fram oil filter was to blame seemed like it was dry starting and it was. the oil filter kept draining back into the motor. what now? i didnt pull the caps off. trying to find out if theres supposed to be some wiggle room or are the bearings shot? probably means the crank bearings are shot too?

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post #2 of 9 Old 01-05-2010, 08:40 PM
Bustedmp
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When you say wiggle around, do you mean front to back inline with the crank, or side to side against the crank. If you can feel any movement against the crank side to side, you've got bad bearings. If the movement is front to back, that is ok. The bearing clearance is only a few thousandths of an inch. If the bearings are bad enough for you to feel any movement that way, it would most likely knock like a cold diesel engine.

Hold my beer and watch this!!!
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post #3 of 9 Old 01-05-2010, 09:03 PM
AZ Jeff
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Why don't you buy some plastigage at the auto parts store and MEASURE the clearances, like any professional would do?

AZ-Jeff
I don't own an XJ any longer, but I still think they are the best of all the Jeep products ever made. My XJ was my favorite vehicle in my 50+ years of driving.
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post #4 of 9 Old 01-06-2010, 06:08 PM Thread Starter
hifooy07
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because im not a PROFESSIONAL... hence the original question!
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post #5 of 9 Old 01-06-2010, 06:37 PM
AZ Jeff
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Quote:
Originally Posted by hifooy07 View Post
because im not a PROFESSIONAL... hence the original question!
A quick google on "measuring journal bearing clearances" allowed me to find this site, which does a good job of describing what you need to do:

Installing, Plastigauging and Measuring Bearing Clearances - Honda, Acura Tech Website, tutorials, tuning and HOW-TO's. Drag racing, street racing, road racing - C-speedracing.com

This is good too:

http://www.jensenhealey.com/tech/pla...astigauge.html

AZ-Jeff
I don't own an XJ any longer, but I still think they are the best of all the Jeep products ever made. My XJ was my favorite vehicle in my 50+ years of driving.
So...I stick around and give advice.
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post #6 of 9 Old 01-06-2010, 06:47 PM Thread Starter
hifooy07
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sweet thank you. Ill check this out and see how things go. I did find some metal shavings stuck in the oil pick up tube. probably a hint of bad bearings?
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post #7 of 9 Old 01-06-2010, 07:54 PM
waltercrovo
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Quote:
Originally Posted by hifooy07 View Post
sweet thank you. Ill check this out and see how things go. I did find some metal shavings stuck in the oil pick up tube. probably a hint of bad bearings?
side play on your rods is NORMAL...that baby would be freak'n knock like there is no tommarrow if they had play you could muster with your fingers in a up and down=parallel motion to the piston travel. they are very easy replace. more than likely you are good to go..if you have over 100k on it i would throw a new set in. in it not uncommon to see some particles in a high milage engine.
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post #8 of 9 Old 01-06-2010, 08:58 PM
Holder350
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Jeep Strokers • Trucks! Cheep Cherokee Buildup

Watch part 5 about 8min in THATS not good....

95' XJ Country - Stock Skids - D30/D35 Limited Slip - 3" Lift - 31x10.50R15 - 4.0 HO - AX15 - NP231

98' XJ Classic - D30/C8.25 - 4.5" RC Lift - 33x12.50R15 - 4.0 HO - AW4 - NP231
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You can tell the character of a person in how they treat someone who can do nothing for them.
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post #9 of 9 Old 01-07-2010, 10:16 AM Thread Starter
hifooy07
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wow im 100% sure mine is good lol. mine moves no where near that.
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