Crank wont rotate.
#1
Crank wont rotate.
After installing a new set of Clevite MS 804P std main bearings, I cant get the crank to rotate. Main caps are only snug, I double checked the part numbers and the bearings are supposed to standard. This is a 400 E block. Any suggestions? Thanks to all.
#2
Update, the crank will rotate if only cap 1 is snug, if I snug any of the other caps the crank wont rotate. I checked the bearings and they are stamped std. Any help appreciated.
#5
Yes I am using rope seal, is there any alternative? Even with the cap with the seal loose when I snug any other cap the crank wont rotate. The bearings are installed correctly, Thanks
#7
Before you do anything else, remove the rope seal completely then reinstall the crankshaft and torque all the caps and see how it turns. Use 10w30 oil, not the thick sticky assembly lube. That way you will get a feel for how the crankshaft turns with no drag on it.
If it turns fine that way then you can either reinstall the rope seal or get a rubber one. I am pretty sure that BOP has them.
If the crank does not turn freely without the seal in place then you have other problems that are going to be hard to address over the internet
If it turns fine that way then you can either reinstall the rope seal or get a rubber one. I am pretty sure that BOP has them.
If the crank does not turn freely without the seal in place then you have other problems that are going to be hard to address over the internet
#9
Why was the motor rebuilt in the first place? Did it have spun main bearings? Did the crank get turned and did the main bearing journals get checked for round and did they get turned? Did the block get align bored? Sounds like it may need it. I had this problem on the first motor i ever rebuilt, it was a 67 E block 400. I had spun the mains in it, didnt know it. When i went to install the crank, just barely tighten the main caps would lock up the crank. Had it alignbored and all was good. But then it needed an under size timing chain.
Just a thought.
Just a thought.
#12
And they don’t make “undersized” chain sets, how could they? They still have the same number of links.
The answer is that the sprockets are slightly oversized, tightening the slack in the chain.
#13
Rope seals, when installed correctly, put a lot of drag on the crankshaft until they have run some. If you are not familiar with this then you could think you have a bearing problem when actually everything is fine. That is why I suggested trying the crank without the seal first.
#17
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