Thread: 350 chevy rebuild question

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So-------I take it that you tightened all the rods with the crank in one place without turning it at all???????????????


You need to torque one pair at a time, with some feeler guage strips between the rods(to hold side clearance straight---also this verifys that the rods do have proper side clearance)and then turn the crank to the next pair and repeat---------


We have seen issues where engines have been assembled with assy lube on the mains and rods and the crank was hard to turn, so customers have brought back the engines and we have reverified to them that the clearance s were correct (mike and dial bore gauges), and then have put 3 w 30 on mains and just the weight of a 1/2 inch ratchet would rotate the crank------------


A further issur that you could be having is reversed location of bearing halves which can cause a binding on the crank radius or another side clearance problem----------


If this is a rebuid with same crank/rods and no machine work on the main bearing or rods-----it is either a parts misuse or operator malfunction????????????


Any way welcome to the site and check all of them----------

Originally Posted by jerry clayton

So-------I take it that you tightened all the rods with the crank in one place without turning it at all???????????????


You need to torque one pair at a time, with some feeler guage strips between the rods(to hold side clearance straight---also this verifys that the rods do have proper side clearance)and then turn the crank to the next pair and repeat---------


We have seen issues where engines have been assembled with assy lube on the mains and rods and the crank was hard to turn, so customers have brought back the engines and we have reverified to them that the clearance s were correct (mike and dial bore gauges), and then have put 3 w 30 on mains and just the weight of a 1/2 inch ratchet would rotate the crank------------


A further issur that you could be having is reversed location of bearing halves which can cause a binding on the crank radius or another side clearance problem----------


If this is a rebuid with same crank/rods and no machine work on the main bearing or rods-----it is either a parts misuse or operator malfunction????????????


Any way welcome to the site and check all of them----------

Good points, I was able to move the crank basically in two different positions to get all the nuts. I did not use a feeler guage but I did have the halves all laid out in the positions I took them off. It is possible that I could have mixed 1 or 2 but pretty sure i kept them the same - i will go through again and use a feeler guage