checking bearings

I searched but could not find a direct answer.

What is the correct procedure for checking bearing with calipers? I checked thickness but looks like I need to be checking width also. Is this procedure the same for mains and rods?

Thinknesses were all within a .001 of each other at bottom and sides.

I also only checked the cap bearing...should I check rod side as well?

Thanks

 

Bearing Measure

Not sure what your trying to accomplish. Little more info needed.

Corey

 

if your checking the bearing for a problem i alwys check the top rod bearing and the bottom main bearings like to much timing lean detonation what ever i always check the center of the bearings for width you can see if it starts to smash out the sides and thickness a little squish out the side you can shave that off remic it and use it agian (a little squish )

 

YOU MIC FROM SIDE TO SIDE i ALWAY CHECK BOTTOM THEN AT THE 2 OCLOCK AND 10 OCLOCK..dAVE

 

compare to new bearings to see how much they crushed

 

scrape off the ally thats been squished out the side and mesure the backing metal for width, up to 3 thou we put them back, over that and their in the bin

 

how often do you guys check them?

 

every run here

 

how often do you change out your rods? Seems that pulling them down every run would shorten their cycle life? Do you cycle out rod bolts between swapping rods (how many times are they re-useable?)

 

15 runs and the rods are out, dont change rod bolts, they usualy are ok for that long,

 

Ditto....EVERY pass!

 

rod every 15 passes check the bearings every pass..Dave

 

anyone ever run the C&A deep cycle rods? How many runs are they good for?

 

I'm sure this is not the norm on this site, but I just check my bearings after a weekend of racing. I'm not rotating the earth with my BBC Altered deal but I do run in the 4.20's and hoping to get into the 4.0 area.

Here's the part I will get crucified for. I run steel rods and have had 6 of the 8 rods I originally started with in the same engine for 4 years. I have replaced pistons several times have heads welded up and blocks bored, but the rods rarely give me problems. Only when I nuke a piston so bad it bends the rod. I don't run every weekend but my rod bearings last about 20-30 runs before I chuck them in the trash. Mains go at least a year. I shift at 8,000 so that might be what is helping. I'm not recommending you do what I do. Just letting you know what is working for me.

 

Measuring Bearings

I always measure the top width of all the top rod bearings and then compare it to the end width of the same bearing. I have noticed several thousands difference in width of bearings in the same sleeve. We do this on every run. And the bottom bearing of the mains once a day if we make more than one run. There are guys who check more stuff more often and others who check things less frequently. A lot depends on how hard you are running the car and how well the motor likes your tune-up. Dave Germain