Damaged Engine ? oil pump bronze gear etc
#1080449
09/22/11 04:26 PM
09/22/11 04:26 PM
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Joined: Jan 2003
Posts: 4,244 Canada
Kam*Kuda
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I have just got the car running over the last couple weeks so there isn't a lot of time with the car.
The oil pressure was fine until about a day or 2. The oil pressure is below 10 at idle and 35-40 at 4000 rpm. (oil pressure guage is comp electrical guage)
Never had any experience chasingthis kind of problem and would love some advice
It has an external oil single line, deep pan.
The engine is a Mopar 500 inch crate engine I bought used. The engine is about 5-6 years old, Eddy heads Small hydralic roller cam.
I was thinking of just pulling the pan and seeing if there is any crap at the pickup? (easy to do with the modified oil k-frame)
(oil changed recently, had some dye in it to find some oil leaks)
What should I look for in the oil pump when I remove that?
Anything I should check. It is noisy for a hydralic cam.
Last edited by Kam*Kuda; 09/30/11 09:45 PM.
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
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Re: Low Oil Pressure %^@#!&* What to check first???
[Re: mac56]
#1080455
09/22/11 05:40 PM
09/22/11 05:40 PM
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Joined: Mar 2009
Posts: 279 Mid Missouri
ETASPEN
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Quote:
I know it sounds too simple but I have had the screw that hold the relief spring in the pump back out.
Buddy had one come all the way out during a pass...I don't have to tell you the rest of the story.
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Re: Low Oil Pressure %^@#!&* What to check first???
[Re: mac56]
#1080456
09/22/11 05:48 PM
09/22/11 05:48 PM
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Joined: Sep 2008
Posts: 29 Washington State
lorenr
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I've seen this with full grove engine bearings. Excessive oil clearance on the rod and main bearings as well as the lifter bores will also do it. Roller lifters can also expose oil grooves to the rockers. Light weight engine oils sometimes reduce pressure, but also increase volume. I often see synthetics that I swear won't develop much oil pressure. Volume is better than pressure. New cars don't have oil pressure gauges because if the buyer knew what the oil pressure really was with 20 weight synthetic they would demand a new motor. 30 to 40 pounds is fine. 10 pounds at idle is low, but also fine. However check it with a known mechanical gauge to be sure.
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Re: Low Oil Pressure %^@#!&* What to check first???
[Re: MR_P_BODY]
#1080458
09/22/11 06:04 PM
09/22/11 06:04 PM
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Joined: Apr 2009
Posts: 3,422 Toronto
mshred
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Quote:
Number one thing... check it with a mech gauge
after having the opposite issues of you, this is the first thing I would do...don't go crazy pulling your pan and such if its just a gauge issue
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Re: Low Oil Pressure %^@#!&* What to check first???
[Re: HPMike]
#1080460
09/22/11 09:42 PM
09/22/11 09:42 PM
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Joined: Jan 2003
Posts: 4,244 Canada
Kam*Kuda
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Crane gold rockers and I and crane hydralic roller lifters Thanks Bob I will come down to borrow it
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
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Re: Low Oil Pressure %^@#!&* What to check first???
[Re: Cab_Burge]
#1080463
09/23/11 01:05 AM
09/23/11 01:05 AM
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Joined: Jan 2003
Posts: 4,244 Canada
Kam*Kuda
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I found a mechanical oil pressure guage at the house and installed it but it was too late to start the car
If the pressure is the same I will 1. Check the pressure relief in the pump 2. Change the oil and filter (It was a fram filter and synthetic oil) I will check with our Napa 3. Check for any fuel in the oil (it is an EFI engine with 83 lb injectors wheer 36 lb would probably do, but I will be procharging it and need those injectors in the future)
Anything else?
Thanks
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
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Re: Low Oil Pressure %^@#!&* What to check first???
[Re: Kam*Kuda]
#1080465
09/23/11 07:16 PM
09/23/11 07:16 PM
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Kam*Kuda
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Well I hope there is an easy answer but here is what I have done. Checked with a mechanical gauge, still 10 lbs at idle. I removed the plug and spring for the pressure relief (Milodon Single line - new) to static pickup I could not see the valve . I could not feel it with my little finger. I changed the oil to Brad Penn 20W50 and a Napa Gold filter. I started it and now have 0 (zero) oil pressure. Note The line from the oil pump to the pan is very short (only a few inches)
Last edited by Kam*Kuda; 09/23/11 07:17 PM.
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
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Re: Low Oil Pressure %^@#!&* What to check first???
[Re: Kam*Kuda]
#1080466
09/23/11 07:20 PM
09/23/11 07:20 PM
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Joined: Jan 2003
Posts: 4,244 Canada
Kam*Kuda
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To get at the oil pump will be a pain so it there is anything I can do before removing the pump... would love to hear it
Engine Plate Mid Plate and transshield, Engine lower one inch and back 1 inch Hard to raise the engine
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
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Re: Low Oil Pressure %^@#!&* What to check first???
[Re: Kam*Kuda]
#1080468
09/23/11 08:15 PM
09/23/11 08:15 PM
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Joined: Aug 2003
Posts: 43,285 Bend,OR USA
Cab_Burge
I Win
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I Win
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Quote:
Well I hope there is an easy answer but here is what I have done. Checked with a mechanical gauge, still 10 lbs at idle.
I removed the plug and spring for the pressure relief (Milodon Single line - new) to static pickup I could not see the valve . I could not feel it with my little finger.
I changed the oil to Brad Penn 20W50 and a Napa Gold filter.
I started it and now have 0 (zero) oil pressure.
Note The line from the oil pump to the pan is very short (only a few inches)
Two things, the oil pump must have a bypass spring and check valve in it to work You can add shims between the spring and the cup that the spring sits in to up the pressure , be careful though, not to much It is NOT UNCOMMON for the Milidon external oiling systems to loose the prime when you open the system, IE remove the check valve plug or oil lines, even changing the oil and filter can cause the loss of prime some times Let us know what you find, like Raff has suggested try priming it before starting it again
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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