bongnak
09-17-2017, 02:27 PM
Hi all,
I'm in the process of building a ka24de and stumbled onto a weird situation and wondered if anyone else went through the same thing.
As we all know, when selecting bearings you can reference the markings on the crank and block to pick OEM graded bearings. At first this is what I did and have done in the past. This time I decided to do it the "accurate" way and bought a set of outside micrometers and a dial bore gauge.
So according to the fsm method and going off the stamped numbers on the block and crank I would have needed 1,1,0,0 graded rod bearings and 3,3,3,2,2 mains.
Ok cool, lets measure the journals and bores...
To my surprise after doing the math none of the markings are right.
The FSM has the specs for bearing thickness and after using that my measurements came out to grade 0 for both mains and rods, for all cylinders.
That's strange, I'm 99.9999% sure this is the first time this block has ever been taken apart since it left the factory.
Then this happened, I went to go measure the old bearings and sure enough they had part numbers on them and all of them were grade 0.
So now this makes me wonder about the damn markings on the block and crank.
Is this an isolated incident or have we been doing it all wrong?
Ps. if I were to go with the markings and use those bearings I would definitely spin bearings.
https://i.imgur.com/bMdHJu1m.jpg
https://i.imgur.com/tOf2pOJm.jpg
I'm in the process of building a ka24de and stumbled onto a weird situation and wondered if anyone else went through the same thing.
As we all know, when selecting bearings you can reference the markings on the crank and block to pick OEM graded bearings. At first this is what I did and have done in the past. This time I decided to do it the "accurate" way and bought a set of outside micrometers and a dial bore gauge.
So according to the fsm method and going off the stamped numbers on the block and crank I would have needed 1,1,0,0 graded rod bearings and 3,3,3,2,2 mains.
Ok cool, lets measure the journals and bores...
To my surprise after doing the math none of the markings are right.
The FSM has the specs for bearing thickness and after using that my measurements came out to grade 0 for both mains and rods, for all cylinders.
That's strange, I'm 99.9999% sure this is the first time this block has ever been taken apart since it left the factory.
Then this happened, I went to go measure the old bearings and sure enough they had part numbers on them and all of them were grade 0.
So now this makes me wonder about the damn markings on the block and crank.
Is this an isolated incident or have we been doing it all wrong?
Ps. if I were to go with the markings and use those bearings I would definitely spin bearings.
https://i.imgur.com/bMdHJu1m.jpg
https://i.imgur.com/tOf2pOJm.jpg