Low Oil Pressure
#2509783
06/17/18 11:06 PM
06/17/18 11:06 PM
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Joined: Nov 2004
Posts: 3,518 pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,518
pacific northwest
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Took the Scamp for a drive and the oil pressure was dropping to zero on the gauge at idle, rpms up it increases but still low. Changed to different headers and wondering if the header too close to the oil filter could create such a drastic change. The Hedmans are a bit closer than the TTI's were to the filter, no other changes except different mufflers. Motor was only running for about 10 minutes max, oil level full and about 85* outside Thoughts?
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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Re: Low Oil Pressure
[Re: Stroker Scamp]
#2509789
06/17/18 11:15 PM
06/17/18 11:15 PM
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Joined: Feb 2005
Posts: 20,203 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,203
PA.
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First step try a new gage then maybe screw on a new filter so you can cut that one apart and inspect for anything that shouldn’t be there.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Low Oil Pressure
[Re: Cab_Burge]
#2511036
06/20/18 08:51 PM
06/20/18 08:51 PM
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Joined: Nov 2004
Posts: 3,518 pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,518
pacific northwest
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Update, tried new gauge no pressure, took filter off and cranked the motor over nothing from the filter as far as pressure What to check next? 1. oil drive shaft stripped? 2, drop the pan and new pump? any way to bench test a pump? Any else you can think of Im all ears Thanks
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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Re: Low Oil Pressure
[Re: Stroker Scamp]
#2511040
06/20/18 09:00 PM
06/20/18 09:00 PM
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Joined: Feb 2005
Posts: 20,203 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,203
PA.
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Common on chevies but rare on mopars but you may have to drop the pan to check the oil pickup. How did the oil filter look as far as contamination. Good, bad. If bad it has to come apart anyway. If it’s a pump at least they are pretty cheap. If it’s bearings, not so much.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Low Oil Pressure
[Re: pittsburghracer]
#2511042
06/20/18 09:01 PM
06/20/18 09:01 PM
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Joined: Feb 2005
Posts: 20,203 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,203
PA.
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Sounds like you should pull the distributor and try a priming tool and a drill
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Low Oil Pressure
[Re: pittsburghracer]
#2511086
06/20/18 10:33 PM
06/20/18 10:33 PM
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Joined: Nov 2004
Posts: 3,518 pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,518
pacific northwest
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Common on chevies but rare on mopars but you may have to drop the pan to check the oil pickup. How did the oil filter look as far as contamination. Good, bad. If bad it has to come apart anyway. If it’s a pump at least they are pretty cheap. If it’s bearings, not so much. Filter looked good so I put it back on, pulled distr. and primed with a drill, had to rev drill pretty good but have pressure at gauge and to the rockers. If I remember correctly I have a 10-30 weight oil where I usually run the 20-50 Valvoline race oil (they were out) can the change in viscosity make that big of a difference? or possibly oil pump getting weak?
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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Re: Low Oil Pressure
[Re: Stroker Scamp]
#2511103
06/20/18 10:53 PM
06/20/18 10:53 PM
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Joined: Feb 2005
Posts: 20,203 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,203
PA.
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Just curious but what kind of filter. And yes viscosity can affect it but also remember the drill rpm doesn’t duplicate engine rpm. Years ago I ran 40 weight, then 30, then 10-40, now 10-30. With the RacePak I can closely watch what is going on during a pass and in the pits.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Low Oil Pressure
[Re: pittsburghracer]
#2511123
06/20/18 11:28 PM
06/20/18 11:28 PM
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Joined: Nov 2004
Posts: 3,518 pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,518
pacific northwest
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Just curious but what kind of filter. And yes viscosity can affect it but also remember the drill rpm doesn’t duplicate engine rpm. Years ago I ran 40 weight, then 30, then 10-40, now 10-30. With the RacePak I can closely watch what is going on during a pass and in the pits. I run a Napa Gold and always have, going to put the Valvoline back in and change filter one at a time to see whats up. Thanks for the tips
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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Re: Low Oil Pressure
[Re: Stroker Scamp]
#2511125
06/20/18 11:33 PM
06/20/18 11:33 PM
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Joined: Jan 2005
Posts: 4,243 Charlotte, North Carolina
sgcuda
master
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master
Joined: Jan 2005
Posts: 4,243
Charlotte, North Carolina
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He already took the filter off the block and cranked it to find no oil coming out of block. What does the filter have to do with anything? Waste of time and money to try a different filter at this point.
[image][/image]
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Re: Low Oil Pressure
[Re: sgcuda]
#2511127
06/20/18 11:36 PM
06/20/18 11:36 PM
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Joined: Feb 2005
Posts: 20,203 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,203
PA.
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He already took the filter off the block and cranked it to find no oil coming out of block. What does the filter have to do with anything? Waste of time and money to try a different filter at this point. Read his post above. He has oil pressure now but it’s not as high
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Low Oil Pressure
[Re: Stroker Scamp]
#2511128
06/20/18 11:38 PM
06/20/18 11:38 PM
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Joined: Feb 2005
Posts: 20,203 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,203
PA.
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Just curious but what kind of filter. And yes viscosity can affect it but also remember the drill rpm doesn’t duplicate engine rpm. Years ago I ran 40 weight, then 30, then 10-40, now 10-30. With the RacePak I can closely watch what is going on during a pass and in the pits. I run a Napa Gold and always have, going to put the Valvoline back in and change filter one at a time to see whats up. Thanks for the tips No problem I hope all turns out well for you
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Low Oil Pressure
[Re: Stroker Scamp]
#2511140
06/21/18 12:04 AM
06/21/18 12:04 AM
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Joined: Dec 2005
Posts: 11,739 Fulton County, PA
CMcAllister
Mr. Helpful
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Mr. Helpful
Joined: Dec 2005
Posts: 11,739
Fulton County, PA
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Going from 20-50 to 10-30 will make a difference. But not a 30-40 PSI difference. I use a 1/2 drill and 2 hands to spin the pump with authority while priming. If you're spinning the pump easily with a 3/8, something's fishy. Wide open with an 800 RPM 1/2 drill should get 60-70 PSI and running the drill slow maybe 30. If not, I would try another filter for the heck of it before looking deeper.
If the results don't match the theory, change the theory.
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Re: Low Oil Pressure
[Re: Stroker Scamp]
#2511147
06/21/18 12:23 AM
06/21/18 12:23 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Filter looked good so I put it back on, pulled distr. and primed with a drill, had to rev drill pretty good but have pressure at gauge and to the rockers. how much pressure?
live every 24 hour block of time like it's your last day on earth
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Re: Low Oil Pressure
[Re: RapidRobert]
#2511172
06/21/18 01:53 AM
06/21/18 01:53 AM
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Joined: Nov 2004
Posts: 3,518 pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,518
pacific northwest
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went back to original gauge and primed with a 3/8 drill 68 psi, so something made the gauge drop to zero, the hunt is on. will let you know what I find
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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Re: Low Oil Pressure
[Re: Stroker Scamp]
#2511175
06/21/18 01:59 AM
06/21/18 01:59 AM
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Joined: Aug 2003
Posts: 43,315 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,315
Bend,OR USA
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went back to original gauge and primed with a 3/8 drill 68 psi, so something made the gauge drop to zero, the hunt is on. will let you know what I find Maybe some tiny bit of debris in the bypass valve in the pump making it stick open when it acted up hot? I've seen that more than once in BB, they are a lot easier to check also Good luck, you will find it
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Low Oil Pressure
[Re: Cab_Burge]
#2511188
06/21/18 02:11 AM
06/21/18 02:11 AM
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Joined: Feb 2005
Posts: 20,203 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,203
PA.
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If you tried this the first time right after changing the oil sometimes it takes a little longer to pick up pressure
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Low Oil Pressure
[Re: pittsburghracer]
#2575180
11/07/18 03:10 AM
11/07/18 03:10 AM
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Joined: Nov 2004
Posts: 3,518 pacific northwest
Stroker Scamp
OP
master
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OP
master
Joined: Nov 2004
Posts: 3,518
pacific northwest
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Finally had a chance to get out to the shop (house remodel) pulled the filter and cut it open, no metal Drained the oil and going to let it set overnight covered so I can inspect tomorrow, looked pretty good so far think I will try another filter and the 20-50 Valvoline oil I normally run and see what happens. I will update my findings and thanks for the advice
footbrake N/A SB 408 Scamp 10.10 @ 132 street/strip 73 Duster 340 street strip 12.79 @ 105
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Re: Low Oil Pressure
[Re: Stroker Scamp]
#2575347
11/07/18 03:09 PM
11/07/18 03:09 PM
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crabman173
Unregistered
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crabman173
Unregistered
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Kink in oil pressure line? While doing the headers? Copper or nylon easy to damage
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