sudden loss of oil pressure
#1941290
10/29/15 09:37 PM
10/29/15 09:37 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
OP
Drag Week Mod Champion
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OP
Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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something weird going on with my van that i love to drive constantly
I didn't get to drive my van the week I was at drag week then for maybe 2 weeks after due to floods and whatever. then a week ago I drove over to the next town about 13 miles, drive home and notice I don't have any oil pressure.
change oil and filter. change oil pressure sender. with a 1/2 drill 0-800 rpm with a mechanical gauge, it says 50 psi at full blast but if I run the drill slow half speed its at 25, slower and its like at 0. so I'm wondering at what rpm the oil pump spins relative to engine rpm. not sure if the gauge in the dash took a crap or if there is a problem. couple days ago, the mechanical gauge was reading near 0 when it was just idling but would go up to 25 when I revved it up. totally stumped
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: sudden loss of oil pressure
[Re: sixpackgut]
#1941342
10/29/15 11:01 PM
10/29/15 11:01 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
OP
Drag Week Mod Champion
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OP
Drag Week Mod Champion
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Charleston
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Yes small block. I just dropped the pan on my ramcharger but i dont think i can get the engine high enough in the van to pull the pan.
At the point of cutting pan and welding it back together or pulling the whole van apart and dropping in a reman engine and having trans rebuilt
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: sudden loss of oil pressure
[Re: sixpackgut]
#1941385
10/29/15 11:53 PM
10/29/15 11:53 PM
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Joined: Oct 2004
Posts: 5,618 long island NY
Ari440
master
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master
Joined: Oct 2004
Posts: 5,618
long island NY
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what weigth oil did you use
try 20/50 see if presure gos up
1.39 9.85 - 137 mph
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Re: sudden loss of oil pressure
[Re: sleepyhead416]
#1941568
10/30/15 10:36 AM
10/30/15 10:36 AM
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Joined: Jan 2003
Posts: 13,360 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,360
Marion, South Carolina [><]
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A lot of miles ? valve seals stuck in oil pickup... Did the small blocks come w/ the nylon lined timing gears like the big blocks did? That crap will get on the pickups also.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: sudden loss of oil pressure
[Re: sixpackgut]
#1941589
10/30/15 11:30 AM
10/30/15 11:30 AM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
OP
Drag Week Mod Champion
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Drag Week Mod Champion
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Charleston
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Its not the pickup getting clogged, that is the reason I just pulled the pan on my ramcharger. This is just different.
I just put 10-30 in it but was thinking I usually run 15-40 rotella in everything and thought maybe give it a try but I feel it just a waste of oil at this point
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: sudden loss of oil pressure
[Re: lewtot184]
#1941590
10/30/15 11:32 AM
10/30/15 11:32 AM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
OP
Drag Week Mod Champion
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OP
Drag Week Mod Champion
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Posts: 9,225
Charleston
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my thoughts were to get the intermediate shaft out for inspection as a starter. there's a plug behind the shaft that if it's missing or fell out will definitely screw the oil pressure up. I had it out and was looking in the valley while I was running the priming shaft and didn't notice anything other then drainback
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: sudden loss of oil pressure
[Re: sixpackgut]
#1941598
10/30/15 11:45 AM
10/30/15 11:45 AM
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Joined: Jan 2003
Posts: 13,360 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,360
Marion, South Carolina [><]
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I'd throw another gauge on it just to rule that out.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: sudden loss of oil pressure
[Re: sixpackgut]
#1941633
10/30/15 01:27 PM
10/30/15 01:27 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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my thoughts were to get the intermediate shaft out for inspection as a starter. there's a plug behind the shaft that if it's missing or fell out will definitely screw the oil pressure up. I had it out and was looking in the valley while I was running the priming shaft and didn't notice anything other then drainback make sure the "drainback" isn't coming from the back of the driver side lifter galley.
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Re: sudden loss of oil pressure
[Re: sixpackgut]
#1941845
10/30/15 10:33 PM
10/30/15 10:33 PM
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Joined: Oct 2004
Posts: 5,618 long island NY
Ari440
master
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master
Joined: Oct 2004
Posts: 5,618
long island NY
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Its not the pickup getting clogged, that is the reason I just pulled the pan on my ramcharger. This is just different.
I just put 10-30 in it but was thinking I usually run 15-40 rotella in everything and thought maybe give it a try but I feel it just a waste of oil at this point if the thicker oil picks up oil preasure then its time to rebuilt it my 340 did this and with a new oilpump but at high rpms it would drop off just save the oil for next time
1.39 9.85 - 137 mph
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Re: sudden loss of oil pressure
[Re: rustbuckett68]
#1943170
11/01/15 07:50 PM
11/01/15 07:50 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
OP
Drag Week Mod Champion
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OP
Drag Week Mod Champion
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Posts: 9,225
Charleston
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The pan on my 79 van came off with no issues, didn't have to lift the engine. Might have to rotate the crank to get the counter weights out of the way, but no big deal. 79 must be different than a 77 because i dropped crossmember 3" and have engine jacked up 2" and i still cant get it off
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: sudden loss of oil pressure
[Re: sixpackgut]
#1945016
11/04/15 02:37 PM
11/04/15 02:37 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
OP
Drag Week Mod Champion
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OP
Drag Week Mod Champion
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Posts: 9,225
Charleston
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pressure relief valve was stuck open. popped right back into place but I'm changing the pump.
Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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