|
|
|
Re: Is there such a thing as a leak free rear main seal mopar?
[Re: MoparBilly]
#2168919
10/06/16 12:24 PM
10/06/16 12:24 PM
|
Joined: Nov 2004
Posts: 7,274
s.w.fl
bonefish
master
|
master
Joined: Nov 2004
Posts: 7,274
s.w.fl
|
FINALLY got mine LEAK FREE,its all in the install,it has to be perfect.and i used the SUPERFORMANCE SEALS.I did this in car WITHOUT loosining the crank.
Last edited by bonefish; 10/06/16 12:29 PM.
|
|
|
Re: Is there such a thing as a leak free rear main seal mopar?
[Re: domingo]
#2531306
08/04/18 12:30 AM
08/04/18 12:30 AM
|
Joined: Jan 2003
Posts: 9,670
Lima, Peru
domingo
OP
EL Master
|
OP
EL Master
Joined: Jan 2003
Posts: 9,670
Lima, Peru
|
Just a followup to this thread....
Now when I build the big Block mopars I always make sure that when I install the the rear main seal on the retainer/cap, the rear main seal ends have to protrude past the retainer/cap at least 0.010 - 0.015
IF THEY DONT, I JUST MILL THE RETAINER/CAP WHATEVER IS NEEDED.
if the cap bottoms out before the seals ends meet, you WILL have a rear main leak. If the seal ends slightly protrude the machined surface of the main seal cap.....NO LEAKS!!
WORKS EVERY TIME. NOT A DROP-
Last edited by domingo; 08/04/18 12:31 AM.
|
|
|
Re: Is there such a thing as a leak free rear main seal mopar?
[Re: domingo]
#2531372
08/04/18 03:05 AM
08/04/18 03:05 AM
|
Joined: Jan 2003
Posts: 4,448
Phoenix, AZ
MoparBilly
master
|
master
Joined: Jan 2003
Posts: 4,448
Phoenix, AZ
|
Mine are all leak free when ran NA.
Then I add nitrous and they leak, especially from the rear main seal!!
"Livin' in a powder keg and givin' off sparks"
4 Street cars, 5 Race engines
|
|
|
Re: Is there such a thing as a leak free rear main seal mopar?
[Re: domingo]
#2531505
08/04/18 02:48 PM
08/04/18 02:48 PM
|
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
StealthWedge67
master
|
master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
|
Domingo’s advice above is sound. I’m not a builder, but I’ve assembled a few over the years and I’ve never had a rear main leak. Both times my current 400/451 have gone together I’ve used the standard FelPro rear main with the rubber crank seals and pipe-cleaner & RTV side seals. The current assembly was 6 years ago. Not a drop of leakage.
I think the crank has a lot to do with it; I have no documentation, but believe the score-marks on the crank are an important component. If they’re worn out or your machinist disturbed them, could be trouble....
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
|
|
|
Re: Is there such a thing as a leak free rear main seal mopar?
[Re: domingo]
#2531531
08/04/18 04:05 PM
08/04/18 04:05 PM
|
Joined: Aug 2003
Posts: 43,359
Bend,OR USA
Cab_Burge
I Win
|
I Win
Joined: Aug 2003
Posts: 43,359
Bend,OR USA
|
Hi!
Is it possible to have a mopar engine, be it small block or big block, with a leak free rear main seal?
IS THERE ANY WAY TO ACHIEVE A ZERO LEAK REAR MAIN SEAL ON THESE OLD MOPARS????? Absolutely 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
|
|
|
|
|
|
|
