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440 oil leak #1153445 01/09/12 01:17 PM 01/09/12 01:17 PM
Joined: Jul 2009 Posts: 25 leawood, ks J johnv OP member
johnv OP member J Joined: Jul 2009 Posts: 25 leawood, ks	I had an annoying oil leak last summer, and it looks like it is coming from the dynamic seal on the front of the crankshaft, the seal that mounts in the timing cover. The large hole in the timing cover is about .050 off center high (the crankshaft is low). It is an aftermarket timing cover and an aftermarket crank. The block has been line honed if that matters. So - I was wondering what is the best way to fix this? Thanks in advance

Re: 440 oil leak [Re: johnv] #1153446 01/09/12 01:22 PM 01/09/12 01:22 PM
Joined: Jul 2008 Posts: 30,430 Florida STAYcation BeEtLeJuIcE ! The village idiot's idiot
BeEtLeJuIcE ! The village idiot's idiot Joined: Jul 2008 Posts: 30,430 Florida STAYcation	Do you have the oil-slinger on it ?

Re: 440 oil leak [Re: BeEtLeJuIcE !] #1153447 01/09/12 01:52 PM 01/09/12 01:52 PM
Joined: Apr 2006 Posts: 3,675 Akron, Ohio U.S.A. roadhazard master
roadhazard master Joined: Apr 2006 Posts: 3,675 Akron, Ohio U.S.A.	If it is off by .050" The only way for your cover to work is to modify the dowel holes so the seal "self centers" then tighten the bolts. However you may run into issues with bolt hole alignment and have to modify those also If you just replace the seal using the same cover "unmodified" the problem will never go away regardless if it has a slinger or not I'd buy a quality timing cover or a used O.E.M. install a new seal and be done with it

Re: 440 oil leak [Re: johnv] #1153448 01/09/12 01:59 PM 01/09/12 01:59 PM
Joined: Jan 2003 Posts: 75,015 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,015 U.S.S.A.	Quote: The large hole in the timing cover is about .050 off center high (the crankshaft is low). It is an aftermarket timing cover and an aftermarket crank. The block has been line honed if that matters. So - I was wondering what is the best way to fix this? Thanks in advance This tells me the problem is with the aftermarket timing cover , what brand is it ? As Road Hazard said you need to move the timing cover up.

Re: 440 oil leak [Re: roadhazard] #1153449 01/09/12 02:03 PM 01/09/12 02:03 PM
Joined: Apr 2007 Posts: 807 Toronto, Canada D dirtybee super stock
dirtybee super stock D Joined: Apr 2007 Posts: 807 Toronto, Canada	if it was line honed wouldn't that put the crank higher? did you install the dampner before tightening the timing cover bolts?

Re: 440 oil leak [Re: dirtybee] #1153450 01/09/12 02:05 PM 01/09/12 02:05 PM
Joined: Jan 2003 Posts: 75,015 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,015 U.S.S.A.	Quote: if it was line honed wouldn't that put the crank higher? did you install the dampner before tightening the timing cover bolts? yes it would put it higher , the cover is located by the dowels on the front of the block , so your thought of bolt tightening does not matter.

Re: 440 oil leak [Re: JohnRR] #1153451 01/09/12 02:57 PM 01/09/12 02:57 PM
Joined: Apr 2006 Posts: 3,675 Akron, Ohio U.S.A. roadhazard master
roadhazard master Joined: Apr 2006 Posts: 3,675 Akron, Ohio U.S.A.	Quote: Quote: if it was line honed wouldn't that put the crank higher? did you install the dampner before tightening the timing cover bolts? yes it would put it higher , the cover is located by the dowels on the front of the block , so your thought of bolt tightening does not matter. If someone line honed it that much they should be ashamed of them selves. Besides what the heck timing chain would fit on it after that

Re: 440 oil leak [Re: roadhazard] #1153452 01/09/12 03:25 PM 01/09/12 03:25 PM
Joined: Mar 2007 Posts: 3,278 West Coast, USA jbc426 master
jbc426 master Joined: Mar 2007 Posts: 3,278 West Coast, USA	Quote: If it is off by .050" The only way for your cover to work is to modify the dowel holes so the seal "self centers" then tighten the bolts. However you may run into issues with bolt hole alignment and have to modify those also If you just replace the seal using the same cover "unmodified" the problem will never go away regardless if it has a slinger or not I'd buy a quality timing cover or a used O.E.M. install a new seal and be done with it This type of problem and fix are pretty common on Slant 6 motors with stock covers. Once lined up properly and bolted down, the modified covers seem to do the job. 1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)

Re: 440 oil leak [Re: jbc426] #1153453 01/09/12 04:21 PM 01/09/12 04:21 PM
Joined: Jul 2009 Posts: 25 leawood, ks J johnv OP member
johnv OP member J Joined: Jul 2009 Posts: 25 leawood, ks	Thanks for the responses, my thought was to try an OEM unit, and check it thoroughly before sealing it up. Do I need to drop the pan to get it sealed correctly?

Re: 440 oil leak [Re: johnv] #1153454 01/09/12 04:43 PM 01/09/12 04:43 PM
Joined: Jul 2008 Posts: 30,430 Florida STAYcation BeEtLeJuIcE ! The village idiot's idiot
BeEtLeJuIcE ! The village idiot's idiot Joined: Jul 2008 Posts: 30,430 Florida STAYcation	You need to uNbolt the pan slightly ....NO need to remove the pan completely.

Re: 440 oil leak [Re: JohnRR] #1153455 01/09/12 05:56 PM 01/09/12 05:56 PM
Joined: Apr 2007 Posts: 807 Toronto, Canada D dirtybee super stock
dirtybee super stock D Joined: Apr 2007 Posts: 807 Toronto, Canada	Quote: Quote: if it was line honed wouldn't that put the crank higher? did you install the dampner before tightening the timing cover bolts? yes it would put it higher , the cover is located by the dowels on the front of the block , so your thought of bolt tightening does not matter. there is some play around the dowels which is why it is recommended to install the dampner before tightening the bolts, it centres the seal around the hub. Always worked for me but never tried another way so

Re: 440 oil leak [Re: dirtybee] #1153456 01/09/12 05:59 PM 01/09/12 05:59 PM
Joined: Jan 2003 Posts: 75,015 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,015 U.S.S.A.	Quote: Quote: Quote: if it was line honed wouldn't that put the crank higher? did you install the dampner before tightening the timing cover bolts? yes it would put it higher , the cover is located by the dowels on the front of the block , so your thought of bolt tightening does not matter. there is some play around the dowels which is why it is recommended to install the dampner before tightening the bolts, it centres the seal around the hub. Always worked for me but never tried another way so then you have a timing cover that is screwed up , I have never had play on dowels in stock timing covers, if there is play when new the dowels and their machining operation in the block is a total waste of time and money for the manufacturer ...

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