Crank bearings poor toleramce/parallelism on thrust face

[scoobydo123]

Anyone found issues with bearings being poorly manufactured? Assembled engine and was checking thrust and had none. Checked without the crank cradle on and have 4thou one side on the back thrust side but on the same face only 2 thou. When I measure the bearing they are all over the place see picture. I ordered another set and they were similiar. I then researched the OEM amd ordered Japanese bearings and they also have variation on the thrust faces ;-(

[E-bmw]

I can't see it very well but unless you are using one of these.



You are measuring with the wrong micrometer.

Those with flat ends will not be sitting correctly on the inner (concave) surface of the bearing shell & will be measuring incorrectly as a result.

ETA.

Edited by E-bmw on Saturday 11th April 08:02

[stevieturbo]

What on earth are you trying to measure ?

Install the caps, torque them up and measure.

[stevieturbo]

Try some plastic bearings ?

https://www.youtube.com/watch?v=8FtyZUhHnc4