Chevy and GMC Duramax Diesel Forum banner

1 - 4 of 4 Posts

·
Registered
Joined
·
1 Posts
Discussion Starter #1
Hi there guys,

Im not sure if I'm in the right area, but I am currently rebuilding my "new to me" 2013 Silverado 2500HD LML from salvage. I need to install a new rear main crank seal, but am coming up short finding the installer tool locally. Does anyone have one I could rent out? Otherwise, any suggestions?

Thanks! -Austin
 

·
Registered
Joined
·
2,660 Posts
Nobody, and I mean nobody, has all of the special tools the manufacturers call out. The only possible source would be to borrow it from a dealer, who is required to have them to keep his franchise. They won't loan them to you though because they cost a fortune and if you don't bring it back they will have to buy another. You could maybe buy one from the dealer but be prepared for sticker shock and a long wait. OTC has the installer tool for a little less than $300. You can get the whole kit for $818. The kent-moore version is a bit more. Ebay has some used ones but they aren't much cheaper than new.

I have been repairing a wide variety of vehicles for all of my life and after 50+ years of drooling over special tools I have come to the conclusion that they are primarily for factory use where a $1000 tool can make sense if it saves 10 minutes on 50 assemblies a day. For us mere mortals it makes more sense to make do with lesser tools.

The special tool to remove the old seal will usually take it out without damage so that it could be reused. I don't know why you would take out a seal and then reuse it but it could be done.
Normally, you take out the old seal to put in a new one. In that case it makes no difference if you damage the seal, just don't hurt the crank or case. To remove the old seal just push a screw driver between the crank and seal lip and pry. It will pop right out. Use an old screw driver that is dull and has no dings in the edge so it won't scratch the crank where the seal has to sit. Even a small scratch on the crank will ruin a new seal in no time. If you happen to damage the crank it isn't the end of the world. You can get a repair sleeve and seal or if it isn't too bad you can polish out the flaw with crocus cloth strips you can get at Harbor Freight.

The two things you have to watch out for when installing a rear main seal is that it remains square with the back of the engine while going in and that the lip doesn't get curled back enough to allow the spring to come off as it passes over the end of the crank. Get those two right and the seal will be fine. The special tools just make that a no-brainer. If you have a brain then you can do it without the tools.

Most new seals come with a thin plastic sleeve inside that fits over the end of the crank. Put the sleeve on the crank, grease it up and push the seal off the sleeve and onto the crank. That will prevent the lip from curling over. Use care while installing the seal to be sure it stays straight and you will be golden.

To drive the seal into place evenly it is helpful to have a seal driver. You can buy universal seal driver sets in a lot of places but my experience is that they don't work well with rear main seals. If you have sockets in that size range then that may work but few amateur mechanics have such large sockets. Sometimes you can use a piece of pipe that matches the OD of the seal to drive it in. Check your junk pile. You want a thick walled pipe with a flat end.

Most often you wind up driving the seal a little here and a little there, tapping around the seal until it is seated. Care is needed to not damage the seal. It is best to drive on the outside edge where the friction and strength are greatest. Using a flat ended punch helps.

This isn't a complicated or difficult job. If you mess it up you can buy a another seal for $20. You can buy a lot of seals for the cost of a special tool.
 

·
Registered
Joined
·
1,253 Posts
Hi there guys,

Im not sure if I'm in the right area, but I am currently rebuilding my "new to me" 2013 Silverado 2500HD LML from salvage. I need to install a new rear main crank seal, but am coming up short finding the installer tool locally. Does anyone have one I could rent out? Otherwise, any suggestions?

Thanks! -Austin
Check on duramaxdiesels.com.

A lot more tech and motor stuff happens over there, with some HIGHLY knowledgeable folks. They will help you out.
 
1 - 4 of 4 Posts
Top