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  #1  
Old 10-31-2010, 08:56 PM
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Front Crank Seal Replacement

I have to replace the front crank seal on my '01. I've reviewed some threads here on it, but all are closed and I have some additional questions. I'm reluctant to pull the radiator, one of my tranny lines is marginal. I intend to replace it, but not immediately, I need the truck up asap. I've got the fan and shroud off and have pretty good access to the crank bolt. My impact won't fit in there. I can see three holes in the spokes of the damper, I assume these are threaded to pull the damper. Can anyone tell me what thread they are?

Another problem I'm having is figuring out how to lock the crank to loosen the crank bolt. The truck is an auto, and I'm alone. Any tips?
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  #2  
Old 11-01-2010, 11:52 PM
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Re: Front Crank Seal Replacement

Any help?
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  #3  
Old 11-02-2010, 01:57 AM
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Re: Front Crank Seal Replacement

I did mine without the special tool and it leaks, thats about all I know. Got to replace it one of these days, and when I do I'll use the right tool.
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Old 11-02-2010, 09:58 AM
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Re: Front Crank Seal Replacement

The crank bolt loosening will require some ingenuity. A good balancer puller will do the job once you get the crank bolt out.
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  #5  
Old 11-03-2010, 04:58 PM
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Re: Front Crank Seal Replacement

I've got two questions here folks:

1. What size bolt will fit the holes in the spokes of the damper?

2. Any tip on how to lock the motor in place by myself to deal with the crank bolt?

Thanks
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  #6  
Old 11-04-2010, 01:56 AM
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Re: Front Crank Seal Replacement

You could try using a hammer on the breaker bar or wedging the beaker bar against the frame and pull the fuse or disconnect the uvc plugs from the valve cover gaskets and bump the key to break the bolt loose. I can't remember off hand what size the threads are for the holes in the dampener.
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  #7  
Old 12-20-2010, 10:15 PM
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Re: Front Crank Seal Replacement

I found out the thread size on the bolt holes for pulling the balancer are 10mm x 1.5. I completed the job using tips I found on the Board here, but I still have a severe leaking problem. When I pulled the balancer, all indications of the front seal being bad were there. The back of the balancer was soaked and it had flung oil all around it. There were no obvious other areas on the front that were oil soaked, and when the truck was running, it appeared the oil was streaming form the seal.

Anyway, it still leaks as bad as before the replacement, a gallon an hour. Once that amount leaks out, it doesn't seem to leak until more oil is added.

I'm wondering now if the crankcase vent might be plugged. I looked around the Board earlier today looking for a thread on servicing the vent but didn't find one. I've seen them referenced but couldn't find a thread. Any suggestions?
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Old 12-20-2010, 10:23 PM
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Re: Front Crank Seal Replacement

To check and see if the vent is pluged take the oil cap off and run it and see if it still dumps the gallon.
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  #9  
Old 12-20-2010, 10:44 PM
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Re: Front Crank Seal Replacement

Lock tight on the front seal?

RTV around the balancer bolt? Did you give the lock tight and rtv time to set while everything was dry?

Did you take off lpop to see if the front cover was scared?
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  #10  
Old 12-20-2010, 11:16 PM
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Re: Front Crank Seal Replacement

sounds like you did not replace the wear ring on the balancer, that is what the seal rides on. a new seal will not seal on a worn ring(99% of the time)
you have to redo it and replace the wear ring
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