The Ford Barn

jetrod · 07-27-2017, 04:39 PM

In June I posted this inquiry;While chasing down a drive train noise I have found the crankshaft is not centered by about .015 in the horizontal. Dial indicating the recess in the flywheel housing reflects this and dial indicating the dowels that locate the flywheel housing also reflects this. So my transmission and motor (crankshaft) are offset by .015. Is this the source of my drive train noise? I have ruled out the differential and the transmission is recently rebuilt. Will the misalignment eventually effect the transmission? Thanks in advance, Jerry.. Now the results are in!!! I installed a new engine with the crankshaft in the proper place and BEHOLD the drive line noise is gone. SO WHAT DID I LEARN? As it turned out the the old engine that was rebuilt by an established rebuilder and was .025 of center (not .015) and none of my mechanic friends had ever even checked that dimension or knew of anyone who checked that dimension before reassembly, I wasn't alone in not looking for this with a new short block. SO WHAT SHOULD YOU LEARN? When getting ready to assemble a rebuilt engine make sure the builder has checked and warranted that the crank is in the right place. It Will save a lot of aggravation. (The builder who will remain nameless is making good on the error.) Jerry

07-27-2017, 04:39 PM	#1
jetrod Member Join Date: May 2010 Location: Central NC Posts: 74	crankshaft misaligned--follow -up In June I posted this inquiry;While chasing down a drive train noise I have found the crankshaft is not centered by about .015 in the horizontal. Dial indicating the recess in the flywheel housing reflects this and dial indicating the dowels that locate the flywheel housing also reflects this. So my transmission and motor (crankshaft) are offset by .015. Is this the source of my drive train noise? I have ruled out the differential and the transmission is recently rebuilt. Will the misalignment eventually effect the transmission? Thanks in advance, Jerry.. Now the results are in!!! I installed a new engine with the crankshaft in the proper place and BEHOLD the drive line noise is gone. SO WHAT DID I LEARN? As it turned out the the old engine that was rebuilt by an established rebuilder and was .025 of center (not .015) and none of my mechanic friends had ever even checked that dimension or knew of anyone who checked that dimension before reassembly, I wasn't alone in not looking for this with a new short block. SO WHAT SHOULD YOU LEARN? When getting ready to assemble a rebuilt engine make sure the builder has checked and warranted that the crank is in the right place. It Will save a lot of aggravation. (The builder who will remain nameless is making good on the error.) Jerry