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8N engine bearings


 
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boler76
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Joined: 07 Apr 2005
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PostPosted: Mon Oct 29, 2012 1:41 pm    Post subject: 8N engine bearings Reply to specific post Reply with quote

sometime previously this engine has had the crank done and new bearings, the crank still measures very close to specs and bearings have max of 3.5 thou clearance, but there are small specks of steel imbedded in the bearings, should I change them or not worry about that?
 
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ZANE
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PostPosted: Mon Oct 29, 2012 1:46 pm    Post subject: Re: 8N engine bearings Reply to specific post Reply with quote

Probably work OK but now is the time to put in new ones. Got to some wear on the bearing.

Be sure to check out the oil pump wear closely while in there. That is really important for good oil pressure.

Zane
 
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TheOldHokie
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Joined: 08 Apr 2005
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Location: Myersville, MD

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PostPosted: Mon Oct 29, 2012 2:49 pm    Post subject: Re: 8N engine bearings Reply to specific post Reply with quote

boler76 wrote:
(quoted from post at 17:41:00 10/29/12) sometime previously this engine has had the crank done and new bearings, the crank still measures very close to specs and bearings have max of 3.5 thou clearance, but there are small specks of steel imbedded in the bearings, should I change them or not worry about that?


Change the bearings!! Where is the metal coming from? Debris like that will make short work of a crankshaft and bearings.

TOH
 
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Bob Harvey
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PostPosted: Mon Oct 29, 2012 2:52 pm    Post subject: Re: 8N engine bearings Reply to specific post Reply with quote

You might think about taking the crank to a machine shop for a more accurate 'reading' and might get away with a simple polish and use new (same sized) brgs. Done it in the past, works well. HTH
 
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ASEguy
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PostPosted: Tue Oct 30, 2012 2:33 am    Post subject: Re: 8N engine bearings Reply to specific post Reply with quote

If you suspect the metal was from the previously machined crank, the installer was very sloppy. Installers are always required to clean machined components. If the crank is out look for more metal to clean and check all mains and rods. Needless to say replace all bearings. If it's not from the previous repair you need to find the reason before reassembly. Gerard
 
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souNdguy
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PostPosted: Tue Oct 30, 2012 5:29 am    Post subject: Re: 8N engine bearings Reply to specific post Reply with quote

i would not even considder not chaig out bearings that had metal embedde din them.

as others said. check it all out now while it still may be salvageable..
 
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