Crank binding???

[zise ex]

so heres the deal i bought 92 tsi awd ran fine before i pulled motor but a flange was broke off the block so i bought a NT motor for like 75$ and im using the NT block for the car. i bought all new main and rod bearings and im using the rotating assembly from the old motor (ran fine before i pulled it) and i put it in the NT block without the rods on the crank spins perfect and then i put the rods on and it spins until i tighten them down even by hand, once its tight it doesnt spin unless i really reallt force it. any help?WTF

 

[DSMDEMON93]

Did you plastigage the bearings to make sure they are properly sized?

 

[viperlp01]

Without a doubt a bearing issue. You need to mic the crank to see what size it is an order bearings accordingly

 

[zise ex]

i didnt do that, they said there was a switch after 3/31/92 in the bearing but i guessing thats the switch from a 6 bolt to a 7 bolt?

 

[thomcasey]

Also, did you mark the direction of the rod caps AND the rod they go to? They must keep their original orientation and pairing

 

[zise ex]

Also, did you mark the direction of the rod caps AND the rod they go to? They must keep their original orientation and pairing

yes i made sure i did all that

i have tried two different cranks as well, it doesnt work for either of them i have also tried two different sets of rods and i put the old bearings in and it workd and everywhere i have looked it says they are the right part. from sealed power part #4-3485CP car date is july of 91

 

[BogusSVO]

You may have .25mm /.010 oversized bearings that would work on a undersized crank, but on a STD crank, it will lock up.

Look on the back of the bearing and see if it marked.

 

[zise ex]

You may have .25mm /.010 oversized bearings that would work on a undersized crank, but on a STD crank, it will lock up.

Look on the back of the bearing and see if it marked.

it gives the part number then says .25mm

 

[BogusSVO]

Then thats the issue....

The old bearings and crank you tried and work is Std crank with std bearings = crank spins

The old STD crank with new .25mm oversized bearings = crank lock up

Either you ordered the wrong size bearings, or they were boxed wrong

 

[zise ex]

oh ok i also ordered another set from napa same prt number but these bearings dont say .25mm so are those okay to use?

 

[Animal8979]

Should, however the tolerances must be checked and within spec (plastigauge) You may need to align hone the main bearings to match the crank..?

 

[zise ex]

okay, turns out orielly had sent me oversized bearings instead of standard because there is a newer fella working there. kinda pissed he set me back a week on my build but at least the problem is solved, thank you for the help i wouldnt have noticed the bearins were oversized fi not for this thread!