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Who Has a Big Block That DOESN'T Leak, Show of Hands
#1270833
07/20/12 12:36 PM
07/20/12 12:36 PM
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Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
bobs66440
OP
top fuel
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OP
top fuel
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
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After break-in and for a few hundred miles on my new engine (my own build), it was completely dry. Not a drop on the floor! I was so happy. Now it's starting to leave quarter to half-dollar sized spots on the floor. I just don't understand why it would change suddenly.  I'm pretty sure it's coming from the rear main as it's pretty wet inside the bell housing. It looks like the oil is getting flung around inside and then dripping down the sides. I spent SO much time and care to get the rear main just right when I built the engine because I HATE oil leaks, and I heard how difficult it is to get one to not leak. The really frustrating thing is, the old engine I pulled out didn't leak at all, but it burned a quart in 200 miles... Is there anyone with a dry engine?? 
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Re: Who Has a Big Block That DOESN'T Leak, Show of Hands
[Re: bobs66440]
#1270834
07/20/12 12:42 PM
07/20/12 12:42 PM
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Joined: Jan 2003
Posts: 27,467
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,467
So Cal
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Troy was battling rear main seal issues that he solved. I know someone else that was having the same problem and solved his the same way too. Both were aftermarket stroker cranks. Read here: https://board.moparts.org/ubbthreads/show...part=1&vc=1
Last edited by autoxcuda; 07/20/12 12:53 PM.
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Re: Who Has a Big Block That DOESN'T Leak, Show of Hands
[Re: bobs66440]
#1270835
07/20/12 12:43 PM
07/20/12 12:43 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Me, so far so good. Bult the engine myself in 2005 and no leaks yet. Don't have alot mile though, maybe 1000. What kind of crank and retainer are you using? My 340 don't leak either...  All factory stuff used on my rebuilds.
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Re: Who Has a Big Block That DOESN'T Leak, Show of Hands
[Re: Challenger 1]
#1270836
07/20/12 12:50 PM
07/20/12 12:50 PM
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Joined: Jan 2003
Posts: 75,004
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,004
U.S.S.A.
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Quote:
All factory stuff used on my rebuilds.
Including rope seals on the rear main ?
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Re: Who Has a Big Block That DOESN'T Leak, Show of Hands
[Re: JohnRR]
#1270839
07/20/12 01:20 PM
07/20/12 01:20 PM
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Joined: Mar 2003
Posts: 4,848
Memphis
HemiRick
master
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master
Joined: Mar 2003
Posts: 4,848
Memphis
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There's no oil on the concrete where my 451 lives, built in 06 and not many miles a thousand or 2 at most. Used the rubber rear seal that comes in a Felpro gasket set.
Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
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Re: Who Has a Big Block That DOESN'T Leak, Show of Hands
[Re: Challenger 1]
#1270840
07/20/12 01:43 PM
07/20/12 01:43 PM
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Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
bobs66440
OP
top fuel
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OP
top fuel
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
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Quote:
What kind of crank and retainer are you using?
.
It's a factory steel crank and 440Source main cap. I read through all the posts regarding this from the past (including all the warnings, etc) and double/triple checked everything to death. As I said, it was totally dry, and I thought I had it beat, but now it's leaking. It also appears to be seeping a little from the head gasket (Cometic MLS) on the driver's side. I spoke to their tech line and they said to try to re-torque the head.
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Re: Who Has a Big Block That DOESN'T Leak, Show of Hands
[Re: bobs66440]
#1270842
07/20/12 02:34 PM
07/20/12 02:34 PM
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Joined: Jan 2003
Posts: 75,004
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,004
U.S.S.A.
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Quote:
Quote:
What kind of crank and retainer are you using?
.
It's a factory steel crank and 440Source main cap. I read through all the posts regarding this from the past (including all the warnings, etc) and double/triple checked everything to death. As I said, it was totally dry, and I thought I had it beat, but now it's leaking. It also appears to be seeping a little from the head gasket (Cometic MLS) on the driver's side. I spoke to their tech line and they said to try to re-torque the head.
Oil from the head should NOT be in the bellhousing but stranger things have happened. I'd be looking at the main seal first.
It's also interesting that you have oil leaking from a wedge head , the only place oil passes thru the headgasket is for the oil to the rockers and that would leak back into the valley ???? Are you sure it's not the valve cover leaking or your intake valley pan ?
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Re: Who Has a Big Block That DOESN'T Leak, Show of Hands
[Re: JohnRR]
#1270843
07/20/12 02:42 PM
07/20/12 02:42 PM
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Joined: Jun 2008
Posts: 3,916
usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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Re: Who Has a Big Block That DOESN'T Leak, Show of Hands
[Re: JohnRR]
#1270844
07/20/12 02:54 PM
07/20/12 02:54 PM
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Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
bobs66440
OP
top fuel
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OP
top fuel
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
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Quote:
Quote:
Quote:
What kind of crank and retainer are you using?
.
It's a factory steel crank and 440Source main cap. I read through all the posts regarding this from the past (including all the warnings, etc) and double/triple checked everything to death. As I said, it was totally dry, and I thought I had it beat, but now it's leaking. It also appears to be seeping a little from the head gasket (Cometic MLS) on the driver's side. I spoke to their tech line and they said to try to re-torque the head.
Oil from the head should NOT be in the bellhousing but stranger things have happened. I'd be looking at the main seal first.
I know the main leak isn't coming from the head. I just added that as an additional complaint (I know I'm whiny lol). I checked really good all around the valve cover and it's completely dry. Also checked the intake pan gasket and the oil pressure sending unit. It's definitely coming from the head gasket unfortunately. I did a search and it seems it's not that uncommon with the Cometics.
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Re: Who Has a Big Block That DOESN'T Leak, Show of Hands
[Re: bobs66440]
#1270845
07/20/12 03:45 PM
07/20/12 03:45 PM
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Joined: Jan 2003
Posts: 75,004
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,004
U.S.S.A.
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Quote:
Quote:
Quote:
Quote:
What kind of crank and retainer are you using?
.
It's a factory steel crank and 440Source main cap. I read through all the posts regarding this from the past (including all the warnings, etc) and double/triple checked everything to death. As I said, it was totally dry, and I thought I had it beat, but now it's leaking. It also appears to be seeping a little from the head gasket (Cometic MLS) on the driver's side. I spoke to their tech line and they said to try to re-torque the head.
Oil from the head should NOT be in the bellhousing but stranger things have happened. I'd be looking at the main seal first.
I know the main leak isn't coming from the head. I just added that as an additional complaint (I know I'm whiny lol). I checked really good all around the valve cover and it's completely dry. Also checked the intake pan gasket and the oil pressure sending unit. It's definitely coming from the head gasket unfortunately. I did a search and it seems it's not that uncommon with the Cometics.
If it were a Hemi I could see it because there are oil drainbacks on the bottom corners.
Ok the stupid question , why did you use cometics on that engine ?
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Re: Who Has a Big Block That DOESN'T Leak, Show of Hands
[Re: JohnRR]
#1270846
07/20/12 04:16 PM
07/20/12 04:16 PM
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Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
bobs66440
OP
top fuel
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OP
top fuel
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
|
Quote:
Quote:
Quote:
Quote:
Quote:
What kind of crank and retainer are you using?
.
It's a factory steel crank and 440Source main cap. I read through all the posts regarding this from the past (including all the warnings, etc) and double/triple checked everything to death. As I said, it was totally dry, and I thought I had it beat, but now it's leaking. It also appears to be seeping a little from the head gasket (Cometic MLS) on the driver's side. I spoke to their tech line and they said to try to re-torque the head.
Oil from the head should NOT be in the bellhousing but stranger things have happened. I'd be looking at the main seal first.
I know the main leak isn't coming from the head. I just added that as an additional complaint (I know I'm whiny lol). I checked really good all around the valve cover and it's completely dry. Also checked the intake pan gasket and the oil pressure sending unit. It's definitely coming from the head gasket unfortunately. I did a search and it seems it's not that uncommon with the Cometics.
If it were a Hemi I could see it because there are oil drainbacks on the bottom corners.
Ok the stupid question , why did you use cometics on that engine ?
Because they offered the thinnest gasket (.027" compressed) I needed for my build to get the compression ratio close to what I wanted. They work (supposedly) well with the aluminum heads and a bonus is they don't need to be re-torqued. Of course this situation may shoot that theory down...
Re-torquing the head would involve raising the engine a few inches to get the header off. Not a project I really want to tackle right now... 
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Re: Who Has a Big Block That DOESN'T Leak, Show of Hands
[Re: hemi71x]
#1270850
07/20/12 06:25 PM
07/20/12 06:25 PM
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Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
roadhazard
master
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master
Joined: Apr 2006
Posts: 3,675
Akron, Ohio U.S.A.
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"Who Has a Big Block That DOESN'T Leak, Show of Hands" 448" in the Barracuda  and 440" in the Charger No leaks anywhere  Then again some think I have an unfair advantage What did you use to lubricate the crank & seal with?
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