clemsparks
Member
Posts: 92
Loc: Columbia, MO
Reg: 05-21-03
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06-16-08 09:37 AM - Post#1456835
Hey all,
I've got a used 350 (Two piece RMS) that I plan on putting into a car. I was wondering how easy or hard it is to snake in a rear main seal with the bottom end assembled. Do you just remove the rear cap and simply feed the seal in? Does this work ok? Or should I leave "well enough" alone?
I'm weighing the options of take the chance on an unknown seal that may weep a bit...or should I just go ahead and replace the RMS?
Thanks,
Clem
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 Vaughn
"11th Year" Gold Supporting Member
Posts: 13637
Loc: Colorado Springs, CO
Reg: 08-08-04
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06-16-08 10:37 AM - Post#1456887
In response to clemsparks
If it is out, replace it.
The easiest way to do it is to remove the oil pan and loosen all the main caps. This will allow you to lift the crank slightly out of the saddles, so you can slide the new upper seal in place. You don't have to remove or loosen the rod caps to do this.
You can sometimes use a tool called a "sneaky pete" to slide in a new seal on the upper side, but it only usually works well with rope seals. I've tried it on neoprene, it wasn't pretty.
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billydonn
Junior Contributor
Posts: 580
Age: 65
Loc: Omaha, NE
Reg: 10-02-07
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06-16-08 05:27 PM - Post#1457249
In response to clemsparks
Change it with engine on stand if you can. But it's not too big a deal to change it in the car if you can get the oil pan off okay without issues. A set of sharp dental-type instruments with hooked or bent ends can come in handy.
Edited by billydonn on 06-16-08 05:28 PM. Reason for edit: No reason given.
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fritz1990
Senior Member
Posts: 6073
Age: 51
Loc: Kansas
Reg: 02-16-03
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06-16-08 06:57 PM - Post#1457345
In response to billydonn
When you start putting in the upper half of the seal, rotate the crank slowly in the direction the seal is going. This usually helps push the seal around the crank, but go slow. Don't forget a small dab of silicone on the ends. 
Regards, Jeff
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 ranman
"2nd Year" Silver Supporting Member
Posts: 10674
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06-16-08 11:31 PM - Post#1457524
In response to fritz1990
When you start putting in the upper half of the seal, rotate the crank slowly in the direction the seal is going. This usually helps push the seal around the crank, but go slow. Don't forget a small dab of silicone on the ends.
Regards, Jeff
Isn't there a speacial sealer made for this?
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BrianEsser
BANNED
Posts: 7383
Age: 37
Loc: North Star, Ohio
Reg: 06-30-01
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06-17-08 07:08 AM - Post#1457708
In response to ranman
I use anerobic(sp?) sealer myself and never had an issue. I believe thats what you're refering to.
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ranman
"2nd Year" Silver Supporting Member
Posts: 10674
Loc: The cold wet and windy O...
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06-17-08 07:17 AM - Post#1457717
In response to BrianEsser
That's the one.
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billydonn
Junior Contributor
Posts: 580
Age: 65
Loc: Omaha, NE
Reg: 10-02-07
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06-19-08 07:13 AM - Post#1459530
In response to clemsparks
When I did mine I staggered the upper/lower joint a little by rotating so that it didn't line up with the bearing cap joints....just a few degrees.
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craigblock
Valued Contributor
Posts: 4008
Loc: Ottawa
Reg: 05-22-05
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06-19-08 11:26 AM - Post#1459732
In response to billydonn
When I did mine I staggered the upper/lower joint a little by rotating so that it didn't line up with the bearing cap joints....just a few degrees.
Same here. It's a good idea and it's fairly easy to do.
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