Whats could be the problem?

[89ghost]

I got my 302 back from the shop put the crank on spins fine. put the rods on that are stamped for each cylinder torque them down and doesent spin. i know its gonna be tight cause everything is new but will not spin when rods are torqued down.

[stevo]

Are the pistons in the cylinders and on the rods?

Stevo

[junk racing]

possibly pinching the rod bearings?

[94mstng94]

Wrong rod bearings... Did you mic the surfaces? Use plastiguage? Are you qualified fof this type of repair?

[WildBill]

I got my 302 back from the shop put the crank on spins fine. put the rods on that are stamped for each cylinder torque them down and doesent spin. i know its gonna be tight cause everything is new but will not spin when rods are torqued down.

Why don't tell us exactly what you done, so we won't have to play 500 questions.

[89ghost]

Yeah the rings are on the pistons, the rods are connected crank is in. i can only torque down 4 rods and it wont turn. speedpro pistons,scat rods,eagle crank. is there any way i can measure the bearings to see if they are standard? i was told that rods could poss be on wrong journals i dont understand cause each rod has a number and each one is in that cylinder.

[89ghost]

I worked on this shit all day long and got nothing done. Its freakin stressing me out.

[JimD]

The bearings should be stamped what size they are, but you really need to use plastigauge on everything.

[tkblkcobra]

Could be the bearings for the connecting rods are to wide for the cranshaft fillet. Clevite makes race bearings that work on crankshafts like Eagle that have a different fillet than a stock crankshaft. See page 15 on this link.

http://www.engineparts.com/publications/CL77-3-402.pdf

If your not using plastiguage, you are going to have problems That could ruin some expensive parts.

[Jimbo]

I bet you used the wrong bearings or used them in the wrong location on the crank.

[Snatch Napkin]

Did you oil down the cylinders first?
Did you put one connecting rod on, spin the crank, and then go to the next?
You can't just torque down a bunch of rods and not spin the crank every single time.

If you started this without using plastigauge or are confused with what you are doing, then stop now.

Put back some more pennies and let a shop put it together.

[greenbullitt]

bearings wrong for the crank size or the rods are backwards, or a rod cap is on backwards.

[broke again]

bearings wrong for the crank size or the rods are backwards, or a rod cap is on backwards.

x2, my vote is rod cap on backwards.