HI

 

Anyone know how to find the correct size for the rod bearing since I am going to use eagle rods?

Measure them lol

Easy, just take the engine out and have a look in the block at the shafts.

haha just kidding.

z1 motorsports sell them give them a call for bearing spec or email them... whoops its sunday, damn.

Thats why i dont really like sundays you cant get anything done :(

Got a mail from Z1. But they where a bit short on info... Just said since I was using eagle rod then the rod bearing grade I gave them couldn't be used and they suggested grade 3 and that the workshop could manchine them down. But how do the machine shop know what size the rods should be?

Got a mail from Z1. But they where a bit short on info... Just said since I was using eagle rod then the rod bearing grade I gave them couldn't be used and they suggested grade 3 and that the workshop could manchine them down. But how do the machine shop know what size the rods should be?

 

There are grades on the engine, and they know the grades for the rods so its best to go by what z1 tell you, The engineers will know what grades to use they are the experts, if there are any probs then send them back to z1.

 

But its best to buy the grades when the engine is out. I did it the same way you have done it, i am impatient and have bought grades to what my rebuilder thinks will be ok and if more are needed so be it.

I gave Z1 the grades:

Rod bearing 111111

Main Bearing: 2211

Engine Block: 2212

 

Those are the numbers right of the engine parts. Told that to Z1 also since I wasn't sure on how to find the correct grade. I got the a mail back saying:

 

The bearing grades that you provided for the rods cannot be used, because you are using different rods. I can send you all grade 3's and they can machine them to the proper size.

 

And my friend at the workshop asked what the measurements on the rods should be?

measure the crank and if it is in within tolerance buy a set of ACL standard main and big end bearings.The reason z1 said your grades are no good is probaly because standard nissan rods are graded by size,this coupled with the crank journal determines the bearing size.But we are talking about microns of difference which is a tad anal to say the least.

measure the crank and if it is in within tolerance buy a set of ACL standard main and big end bearings.The reason z1 said your grades are no good is probaly because standard nissan rods are graded by size,this coupled with the crank journal determines the bearing size.But we are talking about microns of difference which is a tad anal to say the least.

 

^^^ Yep as Jimmer says The differences between the smallest and largest size of the Nissan grades is still well within the Allowed tolerances, which is why aftermarket bearings manufacturers don't list individual grades, they just come in a standard and oversize grades. A set of ACL Bearings will do the trick.

...

OK, thanks:) Got more info here than I did from Z1...

Z1 haven't got anything from ACL. So I'll jut go for he grade 3 and let the workshop do their magic with the rod bearing...

 

Thanks again:D