Main bearings...
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Main bearings...
The truck was ran low on oil and has a knock that seems to be coming from the oil pan. I'm assuming that's most likely the rod bearings (those are the same as main bearings, no?) and was wondering if it's possible to swap bearings through the oil pan? The engine is a 460.
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Rods and mains are different. You can swap through the pan, but it will be a pain in the neck. IF you can get the pan out without halfway pulling the motor.
And it will be a gamble. If you spun a bearing, it's all over. That one has to come out and be resized. So now you have the manifold and head off, and the oil pan, and the motor jacked up a bit...
Anyway, if you can, pull the pan and pull all the bearings before you buy new bearings. If you find a spun bearing, imo, pull the motor and do a proper rebuild. Or at least you'll know if it's one head or two.
Do not mix up bearing caps.
Good luck.
And it will be a gamble. If you spun a bearing, it's all over. That one has to come out and be resized. So now you have the manifold and head off, and the oil pan, and the motor jacked up a bit...
Anyway, if you can, pull the pan and pull all the bearings before you buy new bearings. If you find a spun bearing, imo, pull the motor and do a proper rebuild. Or at least you'll know if it's one head or two.
Do not mix up bearing caps.
Good luck.
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From: springfield Missouri area
You can do the rods and mains in the truck, You have to pull the pan and the rods are easy, The mains you have to do what they call roll them in. You use a cotter pin and flatten the round head. put it in the oil hole in crank and turn crank in the PROPER direction to catch the bearing and roll it out. Make sure your cotter pin is flat enough not to hit the main bearing area of the block. Have done many this way. BUT it is a PITA like they said. But as the guys said if you have a spun bearing your out of luck.
Fleet Mechanic
Joined: Aug 2005
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From: MD
You can do the rods and mains in the truck, You have to pull the pan and the rods are easy, The mains you have to do what they call roll them in. You use a cotter pin and flatten the round head. put it in the oil hole in crank and turn crank in the PROPER direction to catch the bearing and roll it out. Make sure your cotter pin is flat enough not to hit the main bearing area of the block. Have done many this way. BUT it is a PITA like they said. But as the guys said if you have a spun bearing your out of luck.
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FTE Emeritus
Joined: Jan 2006
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From: springfield Missouri area
Me too now, Getting to old to mess with that any more.
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I've done this several times. And No,it's not fun!
Only thing I would suggest is a brass rivet. Using a brass rivet minimizes the chance of scaring the crank or the saddle the main bearing seats in.
But as was said, it's easier pull the engine out and if you find even one spun bearing, you will have to pull it to rebuild it.
Only thing I would suggest is a brass rivet. Using a brass rivet minimizes the chance of scaring the crank or the saddle the main bearing seats in.
But as was said, it's easier pull the engine out and if you find even one spun bearing, you will have to pull it to rebuild it.
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