431 stroker is still leaking oil....help
#1526946
11/01/13 02:26 PM
11/01/13 02:26 PM
|
Joined: Jul 2004
Posts: 751 Hermiston Oregon
mopar_leaner
OP
super stock
|
OP
super stock
Joined: Jul 2004
Posts: 751
Hermiston Oregon
|
ok, here is the deal, I built a 431(440 source kit and stealth heads) for a guy and I used the flat top pistons and stealth heads with minimal decking(only to clean and make flat), and a lunati cam .226/.234@.050 dur. by .494/.513 lift, RPM intake/thunder series AVS 800 carb, HV oil pump, deep oil pan, windage tray with felpro gaskets. when I first fired it up, lots of oil leaks, pulled the engine and replace the cam plug, 2/3 of oil leak gone. Next, I pulled the oil pump and cut 1 coil out of the pressure relief spring, and replaced the gasket...still has 80psi, no change. And replaced both valve cover gaskets from rubber to cork, even better, now only leaking from the rear of the engine. Pulled the engine again, replaced rear main seal, and both pan gaskets using Mopar black ATV, new oil 10-30w (broke it in on 20-50w VR1)also redid the oil galley plugs with new teflon tape. Ran it for 15 minutes in the driveway car facing up towards the garage, and after about 10 minute it started leaking from rear of the engine, but very little (like the size of a silver dollar after 15 minutes).
|
|
|
Re: 431 stroker is still leaking oil....help
[Re: mopar_leaner]
#1526947
11/01/13 02:35 PM
11/01/13 02:35 PM
|
Joined: May 2003
Posts: 1,751 Graham, WA
Polarapete
top fuel
|
top fuel
Joined: May 2003
Posts: 1,751
Graham, WA
|
80 psi oil pressure at what RPM? I would expect that at 8,000 rpm! 25 or 30 psi at a fast idle is more than enough, IMHO
1986 Dodge Ramcharger 440 2wd, Bracket Racer Under Construction 1998 Ram 2500 QuadCab, new daily driver. 2008 Honda Element 2014 Carry-On 7x14 Cargo Trailer
|
|
|
Re: 431 stroker is still leaking oil....help
[Re: mopar_leaner]
#1526949
11/01/13 06:25 PM
11/01/13 06:25 PM
|
Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
|
I'd pull the eng & do the rear seal again & get that taken care of. I know it's a pain but it unfortunately has to be done again because you will never be happy with the drip & it likely will get worse. 80 is slightly too high & unnecessarily wears the intergear etc tho it ain't a dealbreaker being a bit too high but with the easy access of the BB spring I'd shorten it some more. 8-10 psi per 1000 rpm is plenty. I'd be wondering more about the rest of the oiling mods
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: 431 stroker is still leaking oil....help
[Re: RapidRobert]
#1526950
11/01/13 07:29 PM
11/01/13 07:29 PM
|
Joined: Jun 2012
Posts: 1,899 MYRTLE BEACH SOUTH CAROLINA
ek3
top fuel
|
top fuel
Joined: Jun 2012
Posts: 1,899
MYRTLE BEACH SOUTH CAROLINA
|
may be that your pan is not fitting good . could be bent or warped . check the fit all the way around . check the rear seal flange areas and the seal areas on the block/cap . without knowing what windage tray is in use , can't rule out it causing a pan/ fittment issue . my opinion on oil pressure is that 65-70 psi cold is the most you need unless you are seriously racing the car and, that's if you have really tight clearances . using 20-50wt, 35lbs @ 1200rpm hot and 55-65 @5,000 rpm is ideal. more pressure will only over stress the oil pump drive, add extra heat to the oil and can keep the system on bypass ,which will not filter the oil. also, most higher output oiling systems have restrictions to keep some oil in the pan at higher rpms. if the engine is new and really tight on bearing clearances , you may need to use a thinner synthetic race oil with an additive as it will flow better when cold ,and, better deal with heat as well. cutting the spring is the opposite to matching the oil viscosity.
|
|
|
Re: 431 stroker is still leaking oil....help
[Re: mopar_leaner]
#1526951
11/01/13 08:37 PM
11/01/13 08:37 PM
|
Joined: Nov 2005
Posts: 690 New Hampshire, USA
oldiron
mopar
|
mopar
Joined: Nov 2005
Posts: 690
New Hampshire, USA
|
Do you have main studs or bolts? Sometimes the seal retainer rests against the rear main nuts and doesn't allow it to seat fully. If so, then clearance w/grinder. Chased that one for a while
66 Belvedere Vert, 4 Speed/Jerico, slowly, very slowly, getting faster - NA LD Wedge New New Best: 10.56 @129 68 B'cuda 4 gear Jerico - Another New Best of 9.86 & Trying to slow up https://www.youtube.com/watch?v=T4jDLKwd9Gs
|
|
|
Re: 431 stroker is still leaking oil....help
[Re: ek3]
#1526953
11/01/13 09:07 PM
11/01/13 09:07 PM
|
Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
|
Good stuff what eK3 said, get the viscosity right first then mod the spring as needed
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: 431 stroker is still leaking oil....help
[Re: RapidRobert]
#1526954
11/02/13 12:39 AM
11/02/13 12:39 AM
|
Joined: Jan 2007
Posts: 1,668 Mi,U.S.A.
mike s
top fuel
|
top fuel
Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
|
Valve cover gaskets.....Moroso (rubber over steel) I will not waste any more time with cork or rubber. Rear main seal. Source crank has no knurling on the seal area.Cut the retainer.Use the double lip Viton seal or a rope seal.Black seals are not as pliable as they used to be (Mopar and Fel-pro). Don't forget to seal them on the back side.Offsetting them will also help but I have sealed them either way. Use the side sticks from Hemi-Haynes or stock ones if you can find them.Seal the back of the retainer where the sticks are after everything is set. Do not use the silicone to replace the sticks.
Leave the gun.......take the Cannoli's....Mike
|
|
|
Re: 431 stroker is still leaking oil....help
[Re: mopar_leaner]
#1526957
11/02/13 02:58 PM
11/02/13 02:58 PM
|
Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
|
Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
|
There is some addit'l info regarding straight weight vs multi viscosity oils to be perused (I ain't up on it but someone will chime in & help you) but you're headed in a good direction
live every 24 hour block of time like it's your last day on earth
|
|
|
Re: 431 stroker is still leaking oil....help
[Re: mopar_leaner]
#1526959
11/03/13 02:14 AM
11/03/13 02:14 AM
|
Joined: Jun 2012
Posts: 1,899 MYRTLE BEACH SOUTH CAROLINA
ek3
top fuel
|
top fuel
Joined: Jun 2012
Posts: 1,899
MYRTLE BEACH SOUTH CAROLINA
|
Quote:
I did go from 20-50 to 10-30 and now oil pressure is 80 cold and 60 warm at an idle.
if you have tight clearances you could run 5-20 full syn.or use the adj. spring and set the pressure as stated. the newer engines today use the tight clearances to provide long service life [hence the use of 0 weight full syn. oils] also, silicone is a second choice to this http://www.permatex.com/products-2/produ...er-82194-detail you will love the fact that it is more ridged and will stay put. I always use brake clean to de-grease the surfaces and air dry before use. this is just my thoughts...
|
|
|
Re: 431 stroker is still leaking oil....help
[Re: ek3]
#1526960
11/03/13 04:28 AM
11/03/13 04:28 AM
|
Joined: Aug 2011
Posts: 1,083 SE PA
Yellow Fever
super stock
|
super stock
Joined: Aug 2011
Posts: 1,083
SE PA
|
|
|
|
|
|