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I dont know yet but i hope someone will post, I was told its on the crank or rods. But im not sure please post where to find these numbers
I just replaced mine. Apparently the main and rod bearing grades are marked on one of the counter-weights on the crank. I rotated my crank and could not see the markings, so I guess the crank would need to be removed.
I replaced the bearings by pulling the old ones and replacing them with the same part number (Grade 0 in my case). The part number is marked on each bearing half by the "tang"; the last number in the part number designates the grade (0, 1, or 2).
The main bearing numbers are engraved/stamped into a pad on the bottom of the engine block. It is only viewable with the upper oil pan off, IIRC.
The rod bearing numbers/main numbers are also (in *some* SR20s) engraved/stamped on the crankshaft counterweight that is for the #4 cylinder, the one nearest the passenger side.
To calculate which Main Bearings you need do the following:
Crank Numbers(1st row, 5 #s) + Block(upper oil pan mating surface) Numbers
Example: Crank Reads 11111
Block Reads 12222
you need grades: 23333
Rod bearings are the 4 numbers below the crank main bearing numbers (2nd row)and require no addition just straight up
example: 2121
you need grades : 2121
From what I know the Crank is stamped on the last big counterweight on the rear main seal. The numbers are close to the top of the large lobe of the crank on the side facing the rear main seal. The block ones are tough to find cause they are very little and in the corner. They are on one of the 2 corners that flare out from the block where the upper oil pan(bottom end cover) would go. Hope this helps
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~jRod
Last edited by NX$paniard : 09-01-2004 at 02:28 PM.
I replaced the bearings by pulling the old ones and replacing them with the same part number (Grade 0 in my case). The part number is marked on each bearing half by the "tang"; the last number in the part number designates the grade (0, 1, or 2).
Just an fyi, that is incorrect, all of the bearings are stamped with the same part number, the only way to find out the size of the bearing is to look at the color on the side, have it still in the original Nissan box, or look at the color on the side of the bearing if it is still there.
sh*t I had all 1's homes.. it all depends on the crank...all 4 rods from a given crank should all be the same
Maybe its just coincidence(probably) but all of the older (b13 )sr blocks Ive had seemed pretty linear--as in mostly the same grade all the way accross. I used a B14 SR block and it was all over the place from grade 0 thru 4 or 5 or some sh*t.. dont remember exactly.. dont care anymore its assembled
Wait i have a question. So a brand new motor and a used motor are going to require the same grade rod bearing?? There's some kind of test described in the FSM. I thought that was to determine if you needed some new kind of grade because of wear on the motor. Someone clear this up.
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"Does it matter if the door handle lasts 10 years or 20?" Pelata says. "No it does not, because the person will not have the car after 10 years."
-Enjoying my old school nissan quality, day after day
Here are the numbers in question....
Crank Numbers
Block Numbers
Now the rods are also numbered, on one side is the cylinder # they came from, on the other side of the rod is the grade...
Cylinder numbers (1 & 2)
Grade, in this case 0
Personally Ive never seen a rod with anything other than grade zero, but that doesnt mean other grades arent out there.
So the side on the rod big end with only one number is the bearing grade . Just to clarify Thanks for the detailed clear pics and the math lesson. We are putting an 8 CWT crank in a VE and this helps immensely...no guess work. We do plan to double check with plastigauge though.
quick ? so if the grade is 0 then all i have to do is order the part number and give them for exaple the grade 0? i dont have to add anything? all im looking to do is replace the rod bearing itself
i got this off my engine......
Block numbers....01111
crank numbers....23222
second row....1121
third row....01070
and on the other side of the crank i saw this number 60J40
