Rod bearing questions

I have a friend replacing a rod bearing in a '55 cj5 (Fhead). It's an in frame job. How can can he tell what size the bearing needs to be? I think he can read the number off of it but he didn't tell me. Any ideas? Maybe drop another cap and measure that one?

 

Measure the crankshaft journal with a micrometer. This is easy enough if you have access to a 2" micrometer.

 

Should also be stamped in the backside of the bearing.....010, 020, 030, etc...
but.......
why are we replacing just one ?
as Mike says, the diam of the crank needs to be determined
not going to be able to find one just a "little bit thicker"

 

Owner wants velveeta (cheesy)repair for deer lease jeep. What does a set of four cost anyway?

 

haven't bought any in years
have seen them on ebay at times $10-$40 for the set
the trick is whether its the size you need or not

:edit: I might have a set; but will have to check the size
has he determined what he needs?

 

$12.50 a piece @ www.northstarwillys.com

should be able to order from Napa.

Just rebuilt my 134f last year. He should replace the set.

 

I too suggested a whole set. We'll see what happens.

 

I just replaced the rings and inserts on my 56 CJ 5. I also did this as an did an in-frame job.

Had my local parts guy determine the size I needed.

I know it was kind of cheesy for not checking the crank and getting it reground at the time. However it runs like a top and have not had any problems. So....far.

I would recommend that he replace all four inserts while he is at it. And if he pulls his head off at the time, it really would not be to much more work to replace the piston rings. Just shove the pistons out the top of the block and do a ring job. It took me about 20 minutes a piston. The first one was a learning curve and I spent about an hour on it. The rest were easy. I honed the cylinder walls and used a ridge reamer to remove the carbon buildup.

 

I have done this a few times. Best way is to replace the bearings with what is in there (over size??) Then! Drop a hunk of plasti-gage on the suspect one. If it is within tolerance then go for it. If not.... there are REALLY crappy things to do from there.... if one were so inclined.

Read the "jeep bible"
file the ends of bearing a tad and stick a couple of thou shim behind.....
correctly one would tear it down turn the crank and do the whole enchilada.
Most likely the new bearing(s) will do the trick.
-Hill

 

The bearing will be labled with the undersize number .020, etc, or if it is standard it will say std, or perhaps will say nothing about size in which case you can assume it is standard.

My question is, however, why is he replacing a rod bearing?

I doubt you can buy only one rod bearing anyway; you'll likely have to get a complete set.

 

Looks to me like the pricing is for one bearing ($11.69) on the NAPA site.

 

Thanks for the input. I pretty sure he will install a complete set of bearings.