Lost all Oil Pressure today... 440 Magnum
#1270702
07/20/12 01:26 AM
07/20/12 01:26 AM
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Joined: Aug 2006
Posts: 1,884
Tracy CA
rabid scott
OP
"You're Where?"
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OP
"You're Where?"
Joined: Aug 2006
Posts: 1,884
Tracy CA
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So I've been commuting in my '70 Challenger, after getting off the backroads into town I was leaving a stop sign at low engine speed when it started ticking... Look at the gauge... Oh no!! 0 PSI! Shut it off and rolled to the side of the road... Checked the dipstick, oil looks black but its there, no metal that I could see. Fired it back up just in case the oil had moved away from the pickup.... still no pressure. Runs great though!  Engine is a stock internally 1968 440 Magnum, headers, intake, Mallory distributor. I added the Mopar Performance high volume spring to the oil pump when it was out of the car. Tranny is a aluminum flywheel, Centerforce dual friction clutch, A833 OD. Guesses? I'm guessing (and hoping) its the oil pump and I didn't damage anything. Do oil pumps just "go bad"? Maybe the pressure spring broke? What else could it be?    
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Re: Lost all Oil Pressure today... 440 Magnum
[Re: RUNCHARGER]
#1270704
07/20/12 02:02 AM
07/20/12 02:02 AM
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Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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Or you popped a lifter out.... The pick up tube could have broken.. But yeah the relief valve or the drive shaft failed...
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
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Re: Lost all Oil Pressure today... 440 Magnum
[Re: HemiRick]
#1270706
07/20/12 02:25 AM
07/20/12 02:25 AM
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Joined: Aug 2006
Posts: 1,884
Tracy CA
rabid scott
OP
"You're Where?"
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OP
"You're Where?"
Joined: Aug 2006
Posts: 1,884
Tracy CA
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Quote:
Quote:
Or you popped a lifter out.... The pick up tube could have broken.. But yeah the relief valve or the drive shaft failed...
I vote one of these for sure, with broken oil pump driveshaft being my #1 most likely.
Okay, I'll check the driveshaft first! 
How do I check the pressure relief valve in the oil pump?
I doubt it's a lifter because it still runs good, just makes a racket!
Thanks a ton guys!!
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Re: Lost all Oil Pressure today... 440 Magnum
[Re: MoparforLife]
#1270708
07/20/12 02:43 AM
07/20/12 02:43 AM
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Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
Rick_Ehrenberg
top fuel
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top fuel
Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
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Quote:
Twisted the hex drive off the intermediate shaft.
Yeah. if the reg valve sticks open, there's still some pressure, increasing as you (ballsily) rev it.
Running a Mopar without the MP tapered / pinned shaft is like f****** the neighborhood ***** w/o a condom. Sooner or later...
Rick
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Re: Lost all Oil Pressure today... 440 Magnum
[Re: rabid scott]
#1270711
07/20/12 08:05 AM
07/20/12 08:05 AM
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Joined: Jan 2003
Posts: 21,074
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,074
Niles , Ohio
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I had a 400 in my Chrysler do the same thing.Pulled the pump and the drive was good.The pump took a crap.Was exactly like yours.Replaced the pump changed oil and filter and all was good.Rocky
Chrysler Firepower
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