ok...so I started my rebuild and and I just got standard bearings. No machining was done, just freshening up the engine. I got all my pistons in with no problems but when I torque the number 4 rod, I cant turn the engine over by hand. when I loosen it, It turns over fine. My bad, I didnt even plasticgauge anything. this hasnt happened to me before and I cant figure it out. If I have to send the crank out to be machined I would have gotten oversized bearings? Anyone got suggestions?

 

i would plastic gauge the crank even if i didn't get it ground to see if the bearings are the correct ones every once in a while even great manufactures have defects in stuff might as well check if u have it might just be a over size bearing put in the wrong box or something

 

Yeah, Im gonna gauge it just to check. Can anyone confirm the torque specs for the con rods? In the hayes manual, thru 85 is 46lbs, 86 is 43lbs and 87 on is 51lbs. Why is it such a big difference between 86 and 87? I can torque it at 43lbs and turn the crank. its a little tight but not to bad but when I torque it to 51 I cant turn it at all. My 1,2,and 3 are all torqued to 51lbs. Just the stupid number 4 is giving me problems. I have read another post cant remember where with someone having the same problem. I dunno Im gonna gauge it as soon as napa opens.

 

I had the same problem putting mine together... but my motor rand fine for about 500 to 750 miles, let my friend borrow it, now its knocking... I havent had time to look at it yet...

 

Really? did you just leave it like that?

 

in the 89 fsm it says main caps are torqued to 76ft-lb

and rod caps are 51 ft-lb

 

ok thanks on the torque specs. thats what im torqueing them at 51lbs. I just plastic gauged it and at its widest it measures a little larger than .025 which is not enough clearance. I guess I need to send it the the machine shop. Do I need to order a whole new set of oversized rod bearings? or can I still use my standard size and just have them cut that journal a little?

 

ok, I think my #4 connecting rod big end is out of round and that is the reason I cant turn the engine over after I torque my #4 rod. Should I just send all my rods to the machine shop or can I just buy new rods?