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Old 03-10-2009, 12:36 PM   #1
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Default anybody had experience with Rod bearings.

Got nothing to loose, so I'm gonna give it a shot. (So don't tell me about how it's not wrth a try, just pull the motor and replace it.)

Engine runs SOOPER. makes pleanty of power ect....

Has a rod rattle on start-up (before the journals are oiled) and can be herd with no load at certain RPM.

I'm under the imression that I can change rod bearings by removing the oil pan (engine in car).

anybody have any experience with this??? 4.0 liter 6cyl '88 4x4 manual


Stephan
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Old 03-10-2009, 12:42 PM   #2
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yes you can do it that way good luck
you should replace the mains also
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Old 03-10-2009, 12:44 PM   #3
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do your self a favor and remove the fan belt and try a cold start
just to be sure its not your Ac pump or power steering pump
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Old 03-10-2009, 12:47 PM   #4
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can I replace the mains at the same time??? I would like to! didn't think that would be practical.

Why would the ac or power steering pump only rattle fer the first few seconds.. I am 99% sure it's loose rod bearings.. but that doesn't mean muc.. my mechanic listened to it and IMEDIATLY said Rod bearings..
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Old 03-10-2009, 12:51 PM   #5
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A possibility that also comes to mind is cam noise, or possibly a lifter... Just a thought before you tear into it
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Old 03-10-2009, 12:57 PM   #6
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Quote:
Originally Posted by cptcliffhanger View Post
can I replace the mains at the same time??? I would like to! didn't think that would be practical.

Why would the ac or power steering pump only rattle fer the first few seconds.. I am 99% sure it's loose rod bearings.. but that doesn't mean muc.. my mechanic listened to it and IMEDIATLY said Rod bearings..
had a buddy with the same noise and it ended up being the power steering
or AC pump I don't remember witch but every one that herd it said it sounded like a rod
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Old 03-10-2009, 01:03 PM   #7
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you need a small bolt that will fit snug in the oil journal
and grind the head down to the thickness of the main bearing

and grind a nice flat side on it
you will need help
bolt goes in the journal turn crank slowly it will spin the bearing out
replace new bearing the same way
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Old 03-10-2009, 01:08 PM   #8
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Quote:
Originally Posted by mike37 View Post
you need a small bolt that will fit snug in the oil journal
and grind the head down to the thickness of the main bearing

and grind a nice flat side on it
you will need help
bolt goes in the journal turn crank slowly it will spin the bearing out
replace new bearing the same way
pretty sure I don't understand. :-)

I will try the belt.. can't hurt..

Stephan
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Old 03-10-2009, 01:09 PM   #9
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I get what ur saying!!!!!! one bearing at a time with the other six mains in place.. and you can INSTALL the new bearing that way! "Inconceivable!"
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Old 03-10-2009, 01:10 PM   #10
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the thing is if you have a rod knock replacing the bearing probably wont fix it
you will need to resurface the journals
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Old 03-10-2009, 01:13 PM   #11
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Quote:
Originally Posted by cptcliffhanger View Post
I get what ur saying!!!!!! one bearing at a time with the other six mains in place.. and you can INSTALL the new bearing that way! "Inconceivable!"
it works
that was part of my kids job on the drag boat he pits on
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Old 03-10-2009, 01:30 PM   #12
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Quote:
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the thing is if you have a rod knock replacing the bearing probably wont fix it
you will need to resurface the journals

won't fix it huh.. so really no point huh?? complete waste of time..

bearings are made of much softer metal then the crank and the case.. I was banking that the bearings would be take the brunt of it, and replacing just the bearings had a good chance of working.. I imagine they are not tooo far gone, cause it sounds pretty good for the most part.. just rattles on start up before the oil gets there..
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Old 03-10-2009, 01:38 PM   #13
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Quote:
Originally Posted by cptcliffhanger View Post
won't fix it huh.. so really no point huh?? complete waste of time..

bearings are made of much softer metal then the crank and the case.. I was banking that the bearings would be take the brunt of it, and replacing just the bearings had a good chance of working.. I imagine they are not tooo far gone, cause it sounds pretty good for the most part.. just rattles on start up before the oil gets there..
don't get all huffy
just making a comment
I have no problem with you doing what you plan it wont hurt
I'm just saying it my not fix the problem
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Old 03-10-2009, 02:12 PM   #14
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Quote:
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don't get all huffy
just making a comment
I have no problem with you doing what you plan it wont hurt
I'm just saying it my not fix the problem

Not huffy!! just taking your expertise seriously.. I do hate to waste my time.. I guess I would just like to think there is a chance it would work..

Any chance??

S
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Old 03-10-2009, 02:30 PM   #15
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Quote:
Originally Posted by cptcliffhanger View Post
Not huffy!! just taking your expertise seriously.. I do hate to waste my time.. I guess I would just like to think there is a chance it would work..

Any chance??

S
yes if its just bearing wear
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