Re: The best Rear main Seal for a 440?
[Re: 70satelliteguy]
#2826520
09/29/20 04:15 PM
09/29/20 04:15 PM
|
Joined: May 2009
Posts: 511 Temperance, MI
68 HEMI GTS
mopar
|
mopar
Joined: May 2009
Posts: 511
Temperance, MI
|
I just built a engine with a billet retainer and viton seal. Leaked like a sive. Replaced It with stock retainer and a black felpro from the parts store and its dry as a bone.
68 Dart GTS "HEMI" 10.30 @ 131 pump gas street car 3780# 69 Roadrunner 511 six pack 10.92 drive to track street car
|
|
|
Re: The best Rear main Seal for a 440?
[Re: AndyF]
#2826534
09/29/20 05:14 PM
09/29/20 05:14 PM
|
Joined: Apr 2006
Posts: 4,220 West Plains, MO
DrCharles
master
|
master
Joined: Apr 2006
Posts: 4,220
West Plains, MO
|
A stock crank should be knurled. That is always the first thing to look at. If the crank has stock knurling, isn't it required to use a rope seal? Smooth crank surface gets a Viton or other material. I thought the knurling would wear away a rubber seal quickly
|
|
|
Re: The best Rear main Seal for a 440?
[Re: Fasbird]
#2826540
09/29/20 05:30 PM
09/29/20 05:30 PM
|
Joined: Aug 2003
Posts: 8,779 Mt.Gilead, Ohio
OhioMopar
master
|
master
Joined: Aug 2003
Posts: 8,779
Mt.Gilead, Ohio
|
I have the billet Mancini rear main and it doesn't leak a drop of anything.
1969 Dart GTS 340 1969 Super Bee X9 N-96 1969 Coronet R/T X9 N-96 2015 Dodge Dart GT 2019 Ram 2500 Big Horn. Looking for the original block for my Bee. The last 4 are 7449
|
|
|
Re: The best Rear main Seal for a 440?
[Re: OhioMopar]
#2826588
09/29/20 07:16 PM
09/29/20 07:16 PM
|
Joined: Oct 2006
Posts: 1,264 New York, USA
Chargerfan68
pro stock
|
pro stock
Joined: Oct 2006
Posts: 1,264
New York, USA
|
I have one that just got dyno time only. No leak at all. Then, one that leaks quite a few drops after a drive (my buddies car). Both billet seal retainers.
1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.
|
|
|
Re: The best Rear main Seal for a 440?
[Re: 68 HEMI GTS]
#2826660
09/29/20 09:16 PM
09/29/20 09:16 PM
|
Joined: Aug 2003
Posts: 43,163 Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,163
Bend,OR USA
|
Last edited by Cab_Burge; 09/29/20 11:37 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: The best Rear main Seal for a 440?
[Re: Cab_Burge]
#2826758
09/30/20 08:12 AM
09/30/20 08:12 AM
|
Joined: Jan 2003
Posts: 13,363 Marion, South Carolina [><]
an8sec70cuda
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 13,363
Marion, South Carolina [><]
|
I always use normal Fel-Pro replacement rear main seal and the factory retainer. No issues.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
|
|
|
Re: The best Rear main Seal for a 440?
[Re: 70satelliteguy]
#2826773
09/30/20 09:01 AM
09/30/20 09:01 AM
|
Joined: Feb 2003
Posts: 2,810 Sobieski Wi
bee1971
master
|
master
Joined: Feb 2003
Posts: 2,810
Sobieski Wi
|
383/432 Stroker that I built four years ago - Zero drips - Street motor - Factory PCV and Three Nipple Breather 1971
I also use the Mancini Billet - Brown Viton Seal - Second motor that I built with great results
Seal clocked at 6 and 12 for me anyways helped align the retainer using those alignment studs
O rings on side of retainer with a little Permatex Black RTV
If I was buying today
I would probably look at Hughes Engines Retainer Kit - They have a pressure relief area built into the retainer like the factory unit
Last edited by bee1971; 09/30/20 09:02 AM.
1971 Dodge Charger Superbee 2011 Ram Sport 1500 Quad Cab Deep Water Blue Loaded Siberian Huskies
|
|
|
Re: The best Rear main Seal for a 440?
[Re: 70satelliteguy]
#2826776
09/30/20 09:03 AM
09/30/20 09:03 AM
|
Joined: Jan 2003
Posts: 13,363 Marion, South Carolina [><]
an8sec70cuda
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 13,363
Marion, South Carolina [><]
|
How many of the "no leak" rear mains also use a vacuum pump or header e-vac ??? I have 3 of my own here...one has a vacuum pump. The other 2 just have breathers on the valve covers. Never been a fan of the header evac setups.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
|
|
|
Re: The best Rear main Seal for a 440?
[Re: Fasbird]
#2826825
09/30/20 11:06 AM
09/30/20 11:06 AM
|
Joined: Jan 2003
Posts: 17,844 S.E. Michigan
ZIPPY
I Live Here
|
I Live Here
Joined: Jan 2003
Posts: 17,844
S.E. Michigan
|
We're jinxing ourselves even talking about this stuff. This discussion alone causes leaks. It's not good to talk about it.
I've only used the ones from old MP kits and Fel Pro kits.
They have all had a number molded into them: 4227926. I had to look really closely to see it.....(It's not hard to guess whos tooling they came from).
Avoiding snafus during install + the side seals seem to cause alot of problems.
Though the white "swells up when soaked in mineral spirits" side seals never really gave me any trouble, I always thought they were a pain to install and I used up my last pair several years ago on a 440 re-ring. don't believe they are made anymore (were they asbestos or something?).
So on a modern build, myself I substitute RTV for the side seals. I try to inject it inside the groove as much as possible and also pack that area using putty knife/fingers and so on.
Rich H.
Esse Quam Videri
|
|
|
Re: The best Rear main Seal for a 440?
[Re: cudaman1969]
#2826924
09/30/20 02:05 PM
09/30/20 02:05 PM
|
Joined: Aug 2003
Posts: 43,163 Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,163
Bend,OR USA
|
I have used a thin layer of adhesive silicone on the back side to hold the seals to block and seal holder and i ALWAYS use wheel bearing grease on the lip edges of the seal and on the main seal area of the crank surface I have never tried installing the seals and crank dry, NEVER
Last edited by Cab_Burge; 09/30/20 06:00 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
Re: The best Rear main Seal for a 440?
[Re: DrCharles]
#2827085
09/30/20 08:48 PM
09/30/20 08:48 PM
|
Joined: Nov 2004
Posts: 16,479 On the run…
BloFish
I Live Here
|
I Live Here
Joined: Nov 2004
Posts: 16,479
On the run…
|
I just bought and installed the Mancini rear main seal, and it solved my leak issue.
It really doesn't matter whether you win or lose… as long as you look good doing it!
‘65 A100 ‘69 ‘Cuda ‘73 Vega GT ‘06 Mega Cab ‘14 Mercedes SLK
|
|
|
Re: The best Rear main Seal for a 440?
[Re: BloFish]
#2827092
09/30/20 09:00 PM
09/30/20 09:00 PM
|
Joined: Jan 2003
Posts: 6,391 Abilene, Texas
fastmark
master
|
master
Joined: Jan 2003
Posts: 6,391
Abilene, Texas
|
I just bought and installed the Mancini rear main seal, and it solved my leak issue. Me too. Customer had a bad leaker on his motor. It was a fresh rebuild that had cam and piston problems. Just finished it about two weeks ago. No more leaks with the Mancini seal. I also bought the extra cost orange seal with the billet cap.
|
|
|
|
|