Crankshaft hard to turn with new bearings

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01-18-2015, 11:41 AM

#21

Lee04vr

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The block and caps need to be lined honed if the crank won't spin with the caps installed.

01-18-2015, 01:21 PM

#22

miata2fast

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i wonder if you have something between the bearing and block or cap.

01-18-2015, 02:30 PM

#23

guttedmiata

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Quote:

Originally Posted by Lee04vr

The block and caps need to be lined honed if the crank won't spin with the caps installed.

I sure love when people feel the need to repeat what's already been said.

01-18-2015, 06:09 PM

#24

sixshooter

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I've seen one incorrect bearing in a set (+.010 oversized). It happens. Just because you take them out of the same boxes, doesn't mean the are right. Put a micrometer on each of them for thickness.

01-18-2015, 06:18 PM

#25

Godless Commie

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Quote:

Originally Posted by sixshooter

I've seen one incorrect bearing in a set (+.010 oversized). It happens. Just because you take them out of the same boxes, doesn't mean the are right. Put a micrometer on each of them for thickness.

No fair.
I said "move bearings around" yesterday.

01-18-2015, 08:09 PM

#26

Joe Perez

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Quote:

Originally Posted by sixshooter

I've seen one incorrect bearing in a set (+.010 oversized). It happens. Just because you take them out of the same boxes, doesn't mean the are right. Put a micrometer on each of them for thickness.

I keep coming back to this:

Quote:

Originally Posted by mr.skywalker

The same binding occurs with the old bearing in place

Until the question about why the crank doesn't spin with the old bearing is answered, the new bearings belong on the shelf.

Question for Skywalker: is the crank damaged? IOW, if you were to take it to a machine shop and have them spin it with a dial indicator on all the mains, what would the runout be?

01-19-2015, 09:53 AM

#27

mr.skywalker

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Well I figured it out. It was just that one set of caps were mixed up, I must have mixed them up when I took it apart. That's why I prefer doing my engine builds in a short period, usually one or two days so my memory is fresh off what I did. Thanks for the help guys