connecting rods not marked

[supertalon91]

rebuilding this engine has me at a stand still. connecting rods were not numbered upon removal. they were stamped to tell what side the cap goes on, and numbered 1-4 on the piston itself but not on the rod So when the rods came back from the machine shop after having the pistons pressed off, im stuck trying to figure out if it matters which ones are 1-4. there are casted numbers on the I beam of the rod, and also on the cap. 2 out of the 4 rods are the same letters and numbers, and the other two are diff from all the rest. does anybody know or have a block laying around that they could look at. Im sure this has happened before. or does it even matter which order they go. Its 6 bolt engine.

 

[BogusSVO]

yes it dose matter, the caps have to go back on the same rod they came off.

look at the bevel on the edge of the rod, along with any scratches on the side, and take your time, and try to match them up.

once you have that done, take thm back to the machine shop and have them check the big end for round.

 

[supertalon91]

ok I mite have you confused, its not the caps that I have a problem w/, its the rods. does it matter which journal they goto. each of the 4 rods have a casted number. and 2 of the rods have the same castings. the other 2 have different casting numbers(letters) than the 2 that share the same castings. Could each of the casted numbers(letters) on the rod have a place in cylinder order?

 

[BogusSVO]

no... number 3 rod can go in nuber 4 cylinder.. no issues.. just make sure the the pistons face the proper way... should be a dot or arrow on the piston and that will go towards the front of the engine

 

[supertalon91]

so bein that wisco perfers the file fit rings, Imjust going to go back to the mechine shop and have them check it out. from what ive mic'd, they all have the same tolerances but, ya never know. Better to be safe than sorry.

 

[supertalon91]

so as an up date, for those who run across this issue, it doesnt matter were the rods go in order on the crank from 1 to 4. If you are using new pistons, and are using factory rods, as long as your rods face the correct way on the journal of the crank, your good to go. If your using the old pistons as well as the same rods. always keep that piston to that cylinder. mark your caps 1 2 3 4, and never use old bearings .