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Unread 09-11-2013, 08:12 PM   #1
zonkerd
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front crank seal question

my front crank seal is leaking,can I just pull off the balancer and change the seal or do I have to pull the timming cover? looked it up on Mitchel labor op said .9 of an hour. I got the seal today looks like it goes in from the back sideof the cover.Ive done lots of them just not a 5.2 motor.

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Unread 09-11-2013, 08:19 PM   #2
newfieZJ
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Pretty sure it's just pull the balancer . Easier with the cover on the bench obviously . Just be careful not to knock it through . I don't recall if there was a seat for the seal or not
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Unread 09-11-2013, 09:54 PM   #3
Jeeples
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There should be a seat for the seal, so knocking it through shouldn't be an issue.

I may need to do this soon as well, is this something that can be done with the radiator in place or will it need to be removed? I'm assuming do to the labor time posted by the OP it's just a matter of removing the belt, pulling the balancer and then replacing the seal correct?
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Unread 09-12-2013, 05:26 AM   #4
newfieZJ
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Quote:
Originally Posted by Jeeples View Post
There should be a seat for the seal, so knocking it through shouldn't be an issue.

I may need to do this soon as well, is this something that can be done with the radiator in place or will it need to be removed? I'm assuming do to the labor time posted by the OP it's just a matter of removing the belt, pulling the balancer and then replacing the seal correct?

There 'should' be a seat , but I know some covers don't . I think this one does .

Yes , get the balancer off and it's right there .
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Unread 09-12-2013, 07:20 AM   #5
zonkerd
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thanks for the info guys
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Unread 09-12-2013, 05:21 PM   #6
JapJohn
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Quote:
Originally Posted by HighLonesome View Post
timing cover must come off, seal presses in from the rear
I did mine when I changed out my HB without removing the timing cover. There was a lip for the seal to stop on.

Getting it started evenly was a PITA. After I got it started I used a hole saw in a 2x6 wood plank to slip over the crank and used a rubber dead blow to drive it in.
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Unread 09-13-2013, 07:39 AM   #7
HighLonesome
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Quote:
Originally Posted by JapJohn View Post
I did mine when I changed out my HB without removing the timing cover. There was a lip for the seal to stop on.

Getting it started evenly was a PITA. After I got it started I used a hole saw in a 2x6 wood plank to slip over the crank and used a rubber dead blow to drive it in.
I guess my memory has failed me. It's been awhile. Here is a pic, yes it appears it presses in from the front.
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Unread 09-13-2013, 07:59 AM   #8
dnuccio
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a seal installer tool makes quick work of getting that seal in there
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Unread 09-13-2013, 08:21 AM   #9
Jeeples
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Quote:
Originally Posted by dnuccio View Post
a seal installer tool makes quick work of getting that seal in there
Yep you should be able to rent a seal installer kit from the local parts store. If those aren't available then a ball peen hammer and some light tapping around the seal will get the job done.

Don't forget to put a light coating of oil or grease around the seal lip to prevent damaging the seal on startup.
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Unread 09-13-2013, 08:42 AM   #10
JapJohn
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Miller tool 6635.

There are a few on eBay right now, I really wish I had one when I did my seal.

Worth the price IMO.
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Unread 09-13-2013, 08:52 AM   #11
zjosh93
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I bought a piece of 2" PVC pipe and a couple adapters. I cut the pipe into three pieces about a foot long and glued the adapters to the end. I've found that they match a lot of seals, are hollow so they slip over transmission input shafts, and are long enough to let me make sure that I'm 100% square to the seal bore before hammering. Plus they're hard enough to push the seal but soft enough not to hurt the steel shell. Obviously you'd need to cut them shorter for a crank seal but still a good idea I think.
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Unread 09-14-2013, 12:05 AM   #12
Smokey1r
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Don't forget to inspect the seal surface on the balancer, most likely it will have some significant grooving, might want to put a sleeve on it or if the rubber on the balancer is cracking badly or the outer ring on the balancer is misaligned just replace it.....

The seal is real simple to do, i actually pried it out with a screwdriver but i also had the cover off because i was servicing the timing chain cover gasket!.
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Unread 09-14-2013, 09:59 PM   #13
zonkerd
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did my seal today in 45 min! yes goes in the front also installed a redi sleeve on the balancer.
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