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Re: Strange oil pressure problem [Re: jamesc] #1276944 07/31/12 09:36 PM 07/31/12 09:36 PM
Joined: Dec 2006 Posts: 3,667 Arizona C Chris'sBarracuda master
Chris'sBarracuda master C Joined: Dec 2006 Posts: 3,667 Arizona	Rear cam bearing spinning. Chris..

Re: Strange oil pressure problem [Re: jamesc] #1276945 07/31/12 09:39 PM 07/31/12 09:39 PM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	also you need to give a rundown on the exact parts that are being used in this engine. you say it's a 1/2" PU and that it's spaced off the pan far enough. not being a smarta$$ but what did you do to make certain of this? iirc milodon PUs have a raised strip to make sure it's off the pan but moroso's don't it still sounds like a problem on the suction side of the pump

Re: Strange oil pressure problem [Re: Chris'sBarracuda] #1276946 07/31/12 09:52 PM 07/31/12 09:52 PM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	Quote: Rear cam bearing spinning. Chris.. they're fed off the mains

Re: Strange oil pressure problem [Re: jamesc] #1276947 07/31/12 10:30 PM 07/31/12 10:30 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Dont you B/RB guys have 2 or 3 different intermediate shaft lengths... thats why I brought it up

Re: Strange oil pressure problem [Re: MR_P_BODY] #1276948 07/31/12 10:36 PM 07/31/12 10:36 PM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	yea mike i think there's three different "common" ones. iirc stock is the shortest, next would be the one for the milodon aluminum external feed pump then the one for the stock pump with milodon spacer is the longest. but then i think i'm starting to suffer from CRS

Re: Strange oil pressure problem [Re: Hutch] #1276949 08/01/12 01:05 AM 08/01/12 01:05 AM
Joined: Jan 2003 Posts: 6,840 The Swamp S Sixpak master
Sixpak master S Joined: Jan 2003 Posts: 6,840 The Swamp	Quote: Done all that. Even installed another pump. Same deal. The press reg valve has no scratches on it or has it ever nor has it ever been stuck in the bore. Hutch Was the pump replaced with a different brand of pump, or another Melling like the one that was on it? If another Melling I'd try a stock replacement, like a TRW or such...

Re: Strange oil pressure problem [Re: Sixpak] #1276950 08/01/12 01:19 AM 08/01/12 01:19 AM
Joined: Jan 2003 Posts: 296 Ontario Canada H Hutch OP enthusiast
Hutch OP enthusiast H Joined: Jan 2003 Posts: 296 Ontario Canada	Tried 2 pumps..........same. Has roller lifters........... Never loses oil pressure after it gets it..... Oil pickup is off the pan by .375"......... Car may be posessed? Requires exorcism? Had 3 guages connected one in the car and 2 from the head oil feed lines, they read the same. Im thinking something is blocking the guage port feed at times but I don't know what it is. I have run this thing for awhile when its registering zero lbs of oil pressure and it sounds fine. Its been awhile since I looked at the oil gallery layout so I decided to ask before looking out of laziness. Thanks for all the replies. Hutch

Re: Strange oil pressure problem [Re: Hutch] #1276951 08/01/12 07:52 AM 08/01/12 07:52 AM
Joined: Mar 2008 Posts: 5,746 Ontario, Canada Dodgem master
Dodgem master Joined: Mar 2008 Posts: 5,746 Ontario, Canada	Have you had both valve covers off to look in there?

Re: Strange oil pressure problem [Re: jamesc] #1276952 08/01/12 07:59 AM 08/01/12 07:59 AM
Joined: Dec 2006 Posts: 3,667 Arizona C Chris'sBarracuda master
Chris'sBarracuda master C Joined: Dec 2006 Posts: 3,667 Arizona	Quote: Quote: Rear cam bearing spinning. Chris.. they're fed off the mains And I always thought the GAUGE port came off of the rear cam bearing.. I guess I learned something today.. Chris..

Re: Strange oil pressure problem [Re: Hutch] #1276953 08/01/12 09:21 AM 08/01/12 09:21 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Tried 2 pumps..........same. Has roller lifters........... Never loses oil pressure after it gets it..... Oil pickup is off the pan by .375"......... Car may be posessed? Requires exorcism? Had 3 guages connected one in the car and 2 from the head oil feed lines, they read the same. Im thinking something is blocking the guage port feed at times but I don't know what it is. I have run this thing for awhile when its registering zero lbs of oil pressure and it sounds fine. Its been awhile since I looked at the oil gallery layout so I decided to ask before looking out of laziness. Thanks for all the replies. Hutch Well if you think something might be blocking the oil gauge port, put in a 1/8 pipe hose fitting and put a hose on it to a bucket and fire it up to blow the oil out and maybe the obstruction (then look in the bucket)

Re: Strange oil pressure problem [Re: MR_P_BODY] #1276954 08/01/12 11:09 AM 08/01/12 11:09 AM
Joined: Aug 2006 Posts: 1,613 Deerfield, Ohio 70dusterjohn top fuel
70dusterjohn top fuel Joined: Aug 2006 Posts: 1,613 Deerfield, Ohio	Had a buddy that had the same problem with his 413 and couldn't figure out what was going on, he brought it to me in the hopes I could fix it with out tearing it down, the car would lose oil pressure but not knock and would run fine. Started looking, pulled valve covers and intake and found that he went alittle over board with RTV sealer and some got down into the oil pressure passages in the block, so what we did was what Mr P said put lines in a 5gal bucket and started it and blew out all the crap that was in there.

Re: Strange oil pressure problem [Re: 70dusterjohn] #1276955 08/01/12 12:25 PM 08/01/12 12:25 PM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	FWIW i thought there was a cop of this somewhere on moparts but couldn't find it

Re: Strange oil pressure problem [Re: jamesc] #1276956 08/01/12 12:32 PM 08/01/12 12:32 PM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	so it sounds more and more like it's not losing oil pressure only the indication? if you think that's the case then try to blow out whatever might be in there. that would be a strange one because liquids are practically incompressible and the slightest bit of pressure should show on the gauge...something would have to be acting like a perfect check valve. certainly need to share what you find to be the problem

Re: Strange oil pressure problem [Re: jamesc] #1276957 08/01/12 12:43 PM 08/01/12 12:43 PM
Joined: Oct 2004 Posts: 1,327 south central,Pa mopar_to_ya pro stock
mopar_to_ya pro stock Joined: Oct 2004 Posts: 1,327 south central,Pa	bb oil system 7316736-OilFlowBB.jpg (137 downloads) It's a bigblock with a torque flight!!!

Re: Strange oil pressure problem [Re: Hutch] #1276958 08/01/12 12:46 PM 08/01/12 12:46 PM
Joined: Dec 2006 Posts: 235 Tucson AZ. RADAMX enthusiast
RADAMX enthusiast Joined: Dec 2006 Posts: 235 Tucson AZ.	Just a thought but some oil filters do not have a drian back valve. Have you checked the filter for this option. is your filter remote or at the pump.?

Re: Strange oil pressure problem [Re: RADAMX] #1276959 08/02/12 02:54 PM 08/02/12 02:54 PM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	any updates on this one?

Re: Strange oil pressure problem [Re: jamesc] #1276960 08/02/12 08:37 PM 08/02/12 08:37 PM
Joined: Jan 2003 Posts: 296 Ontario Canada H Hutch OP enthusiast
Hutch OP enthusiast H Joined: Jan 2003 Posts: 296 Ontario Canada	Thanks for all the replies. I have had many suggestions even one to check for dirt daubers as apparently then can make a mess of anything when they are in storage for awhile !! I have done a flow test , no silicone etc. I also went and threaded the oil pump and installed a guage right into the pressure port. When it says no oil pressure it has none. I am planning to just pull it all apart, there has to be a problem in this motor somewhere and I will report back when its apart instead of letting it fly apart. Hutch

Re: Strange oil pressure problem [Re: Hutch] #1276961 08/02/12 11:11 PM 08/02/12 11:11 PM
Joined: Jan 2007 Posts: 3,695 nc E emarine01 master
emarine01 master E Joined: Jan 2007 Posts: 3,695 nc	Run the oil pump on a drill with the valve covers off & see what you find

Re: Strange oil pressure problem [Re: emarine01] #1276962 08/02/12 11:17 PM 08/02/12 11:17 PM
Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey J jamesc master
jamesc master J Joined: Jan 2003 Posts: 5,875 communist bloc of new jersey	according to the OP he's checking it right at the pump and getting no pressure, i'm dying to know what this. as long as that pump gear is turning and the suction side is tight there's not much left

Re: Strange oil pressure problem [Re: jamesc] #1276963 08/02/12 11:33 PM 08/02/12 11:33 PM
Joined: Jan 2007 Posts: 3,695 nc E emarine01 master
emarine01 master E Joined: Jan 2007 Posts: 3,695 nc	The suction side is the most likely place for a problem like this but the output of the pump has to be clear enough to displace the volume of air to prime, not likely but possible

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