Is it possible

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Is it possible

Post  tconnection on April 17th 2012, 1:07 am

Is it possible to get the right bearings the first time as far as getting the clearance right?
The main bores measure 3.1932,3.1931,3.1932 3.1931,3.1932 and the journals measure 2.989. Im wanting .003 but .0025 will do.
Thanks

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Re: Is it possible

Post  dfree383 on April 17th 2012, 1:11 am

You need to put some bearings in and measure. They can vary........

and no their is no short cut or magic way of figuring it out.
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Re: Is it possible

Post  dtimmer on April 17th 2012, 2:57 pm

X2 Trial and error is the only way to find out. Different brand bearings crush differently, there are many factors

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Re: Is it possible

Post  tconnection on April 17th 2012, 9:28 pm

OK i gotta get a bore gauge, or would a micrometer work? What 's needed to get it done?
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Re: Is it possible

Post  dtimmer on April 17th 2012, 9:40 pm

A dial bore gauge and a mic (one with a lock on it is useful). Use the mic to measure the crank, lock it, then use the mic to set the dial bore gauge to zero. Torque up what your checking, rods or mains, with bearings in them, then check it with the dial bore gauge. I would assume there is a site somewhere or someone did a write up on the vertical, 45's, and parting line measurements

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Re: Is it possible

Post  tconnection on April 17th 2012, 9:53 pm

Thanks, sounds good.

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Re: Is it possible

Post  dtimmer on April 17th 2012, 10:01 pm

No problem!

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Re: Is it possible

Post  rmcomprandy on April 18th 2012, 12:24 am

tconnection wrote:OK i gotta get a bore gauge, or would a micrometer work? What 's needed to get it done?
Thanks

You need both ... set the bore gauge with the same mic you use to measure the journal.
OR, simply use "Plastigauge" to get it close.

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Re: Is it possible

Post  tconnection on April 19th 2012, 10:14 pm

There's a good bit of good engine builders on here and since so, i have a ? for you guy's.
With the bore and journal measurements that i have, would you go ahead and buy standard x bearings and then check with plastigage if this style is used?
I mean even if the journals measured 2.999 with that bore. Which i would have to get a .010x i think. And
Thanks

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Re: Is it possible

Post  dtimmer on April 19th 2012, 10:29 pm

Don't quote me but I would have to say no. Standard will give you around .0027 - .003. Reason I believe this is your main housing bore is actually a few tenths bigger than the high side. Which will crush the bearing less and give more clearance. If it were mine, I would flat sand those caps and hone the mains a little tighter. But it should be sufficient enough where it is. If you still end up a little tight on the clearance your looking for, you can always polish the crank just a wee bit.

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Re: Is it possible

Post  dtimmer on April 19th 2012, 10:34 pm

oops missed that your cranks is a thou under what it should be (for a -.010 under cut.) In that case, yea you'll most likley need the x bearings. You can also mix the x's with standards to achieve what your looking for. Just make sure you use the same type, and brand of bearing of course.

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Re: Is it possible

Post  tconnection on April 19th 2012, 10:55 pm

Since i gotta buy bearing period, im gonna just go ahead and buy the stdx.
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Re: Is it possible

Post  dtimmer on April 20th 2012, 12:19 am

It should be a good starting point. Just be sure to measure! And don't be too upset if you have to buy another set of bearings lol. Some times its just part of it.

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Re: Is it possible

Post  tconnection on April 20th 2012, 12:31 am

You're right and thanks.

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Re: Is it possible

Post  tconnection on May 11th 2012, 12:19 am

The king .010x was kinda hard to find but their here. I also got the king stdx rod bearings. I hope they both work.
Thanks alot

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