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Size of crank bearings? - Cars & Trucks

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Posted on Jan 02, 2017

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SOURCE: Bearing spun should i just get the next size up , the crank feals smooth. Th orignal size was sloppy

if it spun you will probably have to take the crank and have it machined or it will spin again

Posted on May 05, 2009

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1 Answer

Which rod bearings???????


what you are seeing are under sizes for bearings available for when the crankshaft is ground
you have to measure the journals with a micrometer to see it it is standard size or has been ground
or if you are just putting new bearings in during a quick engine rebuild then the bearing size will be stamped on the back of the shell
it will be either std or the .010" etc and you need the bearings with that size on them
anything else but std on a std crank journal will jam the shaft up--or .010" means that the crank has been ground .010" and needs bearings of that size
conversely if you put std shells on a .030" ground shaft , the bearings will flog out and oil pressure will be low to non existant

Mar 15, 2016 | Cars & Trucks

1 Answer

Bearing oil clearance and new size bearing


Is the shaft a perfect shape, if a bit out, it will fail straight away as the hardened coating is now missing. Use Engineers Blue and check the shaft.

Mar 01, 2017 | 1994 Acura Legend

1 Answer

Bearing oil clearance and new size bearing


No the oil clearance is correct for BOTH bearings @ .022 -.046 mm to try to get a true clearance measurement use a micrometer and measure in 4 places 90 degrees part this will check for out of round journal and compare to a factory journal size. there may be a .001 thousand or .002 thousand undersize bearing insert that will bring oil clearance in to specs. but most connecting rods get black from a spun bearing and they need to stay round so a inside micrometer is used to check that 10 times out 10 the connecting rod is replaced.

Apr 17, 2014 | 1994 Acura Legend

1 Answer

Connected new rod bearings, and crank wont turn. ???


check that you kept the caps and rods as units as any one cap will not fit any other rod. The same goes for the main bearings. Have you got the correct size bearings for the crank shaft. Have you placed the rods in the cylinder correctly. have you placed the bearing slippers in the cap and rod correctly

Nov 11, 2013 | 2000 Ford Focus

1 Answer

Replace engine rod bearings in 2003 olds alero 2.2


They are replaceable. Common reasons for replacement include noise and low oil pressure. Replacement bearings come in standard as well as various undersizes, so rule number one is to make sure the bearing size matches the crank journals.


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NEC Dash Programmer ECU Flasher

Dec 07, 2012 | Cars & Trucks

3 Answers

What is the difference between standard size main bearing and oversize main bearing. Which is best for the 5.4L V8 engine


thats a good un? ok standard bearings are a standard size,,,over size bearings are smaller in the center to make up for the metal that has been removed from when the bearing was re-fased
ie: ground down to smooth it off so its flat again,,,,,now you can fit oversized bearings on a standerd bearing becouse they would be far to tight and would lock the bearing up,,,,so you need to re-grind the bearing serfice or fit standerd bearings back in,,,only if the shaft is a good one?
i hope this has help you out

Nov 28, 2010 | 1997 Ford Expedition

1 Answer

Re-grinded crank fitted and developed initial problem


While tough to say from this vantage point it would appear the wrong size bearings may have been used. Did your mechanic use plasti-gae to confirm what size bearing were needed? A newly reground crank with proper bearings and lube should be able to have been rotated.

Good luck and I hope this may have assisted,
Tom

Jan 11, 2010 | 1990 Mitsubishi Montero

2 Answers

Motor wont crank


It has happened to me that, when ordering parts, i was given .025 oversized bearings after ordering standards. take it back apart, and double check the bearing marks. if they are what you ordered, use some micrometers or plastigage, and get the correct set.

Sep 14, 2009 | 1988 Volvo 240

1 Answer

Bearing spun should i just get the next size up , the crank feals smooth. Th orignal size was sloppy


if it spun you will probably have to take the crank and have it machined or it will spin again

Apr 16, 2009 | Chevrolet Blazer Cars & Trucks

1 Answer

Renault 19 16v F7P 704 engine


how do you take cv joint off drive shaft

Jun 16, 2008 | 1986 Renault Sport

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