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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Oct 2012 Posts: 85 Shop Shark | | Shop Shark Joined: Oct 2012 Posts: 85 | I will be attempting to replace the rear rope cranshaft seal on my 1953 GMC engine. Althought the proceedure is well documented and states that the crankshaft needs to be loosen so that it can drop a bit to allow the rope seal to be install on the upper bearing. I need to know what the torque specification are when tightning the bolts. Also is there a pattern I should follow such as front to back or left to right??
Dan | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy DJRoy, the torque listed in one of my Motors manuals is 100 - 110 ft. lbs., I couldn't find it in two maintenance manuals I checked, as far as a pattern is concerned I have always started in the center and then worked out, hope that helps. | | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | When I replaced my main bearings, I dropped the crankshaft a fair amount. I found out that if I didn't let it down evenly it would hang up on the thrust bearing. Also it can damage the front seal but in my case I had the cover off. I also had to check that the timing marks were aligned when I pulled it back up into place. You shouldn't have to drop it that much. | | |
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