Re: Vasoline for oil pump replacement
[Re: 53fopar]
#1759854
02/22/15 12:27 AM
02/22/15 12:27 AM
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Joined: Nov 2004
Posts: 1,708 S. Il. U.S.A.
5spdcuda
top fuel
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top fuel
Joined: Nov 2004
Posts: 1,708
S. Il. U.S.A.
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Probably not necessary, but I always do it on small blocks since I don't want to have to pull a freshly sealed oil pan even if it's still on the engine stand much less in the car. Most of time simply spinning the pump with a hex shaft will suck oil without any vasoline or other help, but I don't want to chance it. Big blocks with their external pumps I am not that concerned about. On big blocks I just make sure they have some oil in them. I've never seen where the vasoline does any harm.As far as avoiding the need to pull the distributor and drive gear is concerned, so long as the engine already has oil in all the galleries,bearings, etc. then no you don't have to do it. If it's a fresh unfired engine then yes do it.
Last edited by 5spdcuda; 02/22/15 12:33 AM.
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Re: Vasoline for oil pump replacement
[Re: dogdays]
#1759857
02/22/15 02:59 PM
02/22/15 02:59 PM
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Joined: Nov 2007
Posts: 21,825 Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,825
Kirkland, Washington
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Quote:
Oil pumps are constant volume pumps, meaning for a given rpm they pump a given volume of oil. They really don't make pressure, just flow.
So, it is the flow restriction downstream that determines what the pressure is at the outlet of the pump. If the flow restriction decreases, the pump pressure will decrease. That's what happens when clearances open up.
The only way to get increased pressure through a fixed restriction is to pump more volume. That's what the high volume pump does. It's Pumping 101. So if your oil pressure is decreasing because the clearances are opening up, a high volume pump should crutch the situation and allow you to get more miles out of that set of bearings.
R.
: correct
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Re: Vasoline for oil pump replacement
[Re: 53fopar]
#1759859
02/22/15 04:10 PM
02/22/15 04:10 PM
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Joined: Nov 2007
Posts: 21,825 Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,825
Kirkland, Washington
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Quote:
Yeah, I am guessing the cam bearings are the problem. Pressure isn't awful, about 5psi at idle when hot. In he summer I switch to 20W50 to keep pressure up. With all my money going in the transmission swap, I don't have the money to do the motor this year. Not burning any oil yet. I think it will hold up another year, maybe more, before needing a re-build. Not really looking for a racing pump, just improvement over OEM.
I was checking into rear seals and get a lot of conflicting information. Rope or rubber? Silicone or not? Off-set the two halves or line up with the bearing cap? And I thought it would be simple..... (Quote)
(Quote) Cam bearings are very lightly loaded. Odds are that its the rod and/or mains. The HV pump IS the band-aid for that issue.
As far as the rear main, get the Orange Viton seal maid by Superformance. Yes offset the split in the housing. Don't worry about a knurled crank or not--I put one on a knurled crank and it does not leak a single drop!
I hate cars that leak!
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Re: Vasoline for oil pump replacement
[Re: 53fopar]
#1759860
02/22/15 06:31 PM
02/22/15 06:31 PM
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Joined: Jan 2003
Posts: 25,817 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,817
Rio Linda, CA
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Packing the rotors and drive shaft with Vaseline seals the rotors and improves suction for initial startup.
The INTERNET, the MISinformation superhighway
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Re: Vasoline for oil pump replacement
[Re: JoesMopar]
#1759865
02/26/15 01:14 AM
02/26/15 01:14 AM
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Joined: Nov 2007
Posts: 21,825 Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,825
Kirkland, Washington
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Quote:
Don't you need a hardened intermediate shaft when you use the HV pump? I thought they also had a radius on the shaft as well?
Do you NEED it? Well no, but it's a pretty damn good idea. Radius on the shaft is what identifies a hardened shaft from standard.
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Re: Vasoline for oil pump replacement
[Re: goldmember]
#1759867
02/26/15 03:53 PM
02/26/15 03:53 PM
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Joined: Jan 2003
Posts: 25,817 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,817
Rio Linda, CA
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Would you start a new engine with no assembly lube? Then don't turn a new pump without lubing it internally.
Sure, oil will work but Vaseline clings better and will dissolve in the oil.
The INTERNET, the MISinformation superhighway
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