Re: Bad Main bearing cause?
[Re: VoodooCLD]
#1191160
03/04/12 07:18 PM
03/04/12 07:18 PM
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Joined: Oct 2011
Posts: 460 Oklahoma
VoodooCLD
OP
mopar
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OP
mopar
Joined: Oct 2011
Posts: 460
Oklahoma
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front main cap
At this time i don't have any pictures of the bottom caps until i go rent a harmonic balancer puller.
EDIT! Don't have any picture of the TOP bearings. Got confused with the engine upside down!
Last edited by VoodooCLD; 03/04/12 07:46 PM.
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Re: Bad Main bearing cause?
[Re: VoodooCLD]
#1191165
03/04/12 08:13 PM
03/04/12 08:13 PM
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Joined: Aug 2003
Posts: 43,129 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,129
Bend,OR USA
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Acid in the oil can cause the damages you see like on the rear main bearing, so can dirt #1 main bearing gets oiled first, #5 gets oiled last Have you looked at any of the rod bearings yet? If not look at them also, the main bearings get oil first and many times they will eat the dirt, if it is bad enough the metal and dirt from the mains will be washed into the rods also Let us know what you find BTW, how long has it been since the motor was built and ran for the first time years or months, not miles
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Bad Main bearing cause?
[Re: Cab_Burge]
#1191166
03/04/12 08:54 PM
03/04/12 08:54 PM
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Joined: Oct 2011
Posts: 460 Oklahoma
VoodooCLD
OP
mopar
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OP
mopar
Joined: Oct 2011
Posts: 460
Oklahoma
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I bought the car 7 years ago. Drove it right away for about a year and a half. Sat for a year, then drove it for another year and a half. The last stint as been sitting for about 3 years. I havn't tried to start at all in the past 3 years becuase the water pump went out and the fan went through the radiator. I finally decided to just go back through the car so i pulled the engine. I'm gonna pull the crank and take it to have a machine shop check it out. I tried mic'ing it but my tools are crappy, and combined with the wobble of the engine stand, i couldn't get an accurate reading.
If its no good, i might just have to look into stroking it.
Oh ya is the number 1 bearing the front of the engine or back?
Last edited by VoodooCLD; 03/04/12 08:58 PM.
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Re: Bad Main bearing cause?
[Re: 340duster340]
#1191172
03/04/12 09:54 PM
03/04/12 09:54 PM
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Joined: Oct 2011
Posts: 460 Oklahoma
VoodooCLD
OP
mopar
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OP
mopar
Joined: Oct 2011
Posts: 460
Oklahoma
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bores look good, but no crosshatching. If those bearings are dated 99 then that probably lines with his story. If i got the crank straigtened away, and put new main and rod bearings it. Shouldn't it be good to go?
My only fear is that maybee it got some shoddy workmanship. Either that or i destroyed the bearings some how.
Last edited by VoodooCLD; 03/04/12 09:55 PM.
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Re: Bad Main bearing cause?
[Re: VoodooCLD]
#1191173
03/04/12 10:24 PM
03/04/12 10:24 PM
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Joined: Sep 2004
Posts: 654 MN
astrobuf
mopar
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mopar
Joined: Sep 2004
Posts: 654
MN
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I would check the crank for straightness and you may well need to check the block's line bore. I'm thinking there damage seen may not be due to trash in the oil, but instead by a bent crank and/or line bore that is not true.
Astrobuf
So, are you really a Rocket Scientist?
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Re: Bad Main bearing cause?
[Re: MoparforLife]
#1191175
03/04/12 11:15 PM
03/04/12 11:15 PM
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Joined: Jan 2003
Posts: 4,323 NY NY
340duster340
master
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master
Joined: Jan 2003
Posts: 4,323
NY NY
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Quote:
Lots of engines are rebuilt on a 'budget' if it was holding good oil pressure only the rod bearings and rings are replaced. Maybe even the valves reseated.
thats what i was thinking if the bores had no visible cross hatch.
maybe the motor wiped a cam or tossed a bearing and the guy put it back together on the cheap. honestly for the time you are going to spend working on it to maybe get it right, i would either correctly rebuild what you have or get a 440 and run / rebuild that.
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