rover 4.6 oil pump priming
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rover 4.6 oil pump priming
hello all,
How long does it normally take for the rover 4.6 crank driven oil pump to prime, when starting the engine first time?
I've ran mine on the starter a few times with no plugs in, then fired it up for very short period...…
But I'm not seeing the oil pressure gauge registering anything.
How long can the engine safely run with oil pressure from start.
Baring in mind the engine has been newly rebuilt.
thanks
scott
How long does it normally take for the rover 4.6 crank driven oil pump to prime, when starting the engine first time?
I've ran mine on the starter a few times with no plugs in, then fired it up for very short period...…
But I'm not seeing the oil pressure gauge registering anything.
How long can the engine safely run with oil pressure from start.
Baring in mind the engine has been newly rebuilt.
thanks
scott
Re: rover 4.6 oil pump priming
I'd not start the engine at all if no pressure when cranking. With an unworn engine, I'd expect the oil pressure light to go out when cranking.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
Re: rover 4.6 oil pump priming
It took me 3 minutes to get pressure cranking on the starter then firing it up before I got pressure. Make sure the oil filter is filled and I pumped a lot of oil in through the oil pressure switch pressure hole. On my engine, there is also an access port on top of the oil cooler so I also pumped in lots of oil there before firing up.
Yes is very concerning how long it takes.
Garry
Yes is very concerning how long it takes.
Garry
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Re: rover 4.6 oil pump priming
now I'm getting worried…..
I've spent all afternoon trying things.....and still no oil pressure.
Removed the oil pressure sender and filled the passageways full of oil.
removed the pressure valve & spring, it wasn't stuck and came out freely, filled the passageway full of oil and replaced the valve & spring.
again plugs out and turned it over on the starter, oil pressure gauge isn't showing anything...….
anywhere else I could try and fill it from?
Always thought the serpentine oil pumps primed quicker than the older dizzy driven ones.
cheers
scott
I've spent all afternoon trying things.....and still no oil pressure.
Removed the oil pressure sender and filled the passageways full of oil.
removed the pressure valve & spring, it wasn't stuck and came out freely, filled the passageway full of oil and replaced the valve & spring.
again plugs out and turned it over on the starter, oil pressure gauge isn't showing anything...….
anywhere else I could try and fill it from?
Always thought the serpentine oil pumps primed quicker than the older dizzy driven ones.
cheers
scott
Re: rover 4.6 oil pump priming
What sort of gauge? Are you sure it would show cranking pressure? I'd remove a rocker cover, and see if oil is being pumped up to them,
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
Re: rover 4.6 oil pump priming
I have a feeling that the crank driven pumps don't prime until the engine fires up. I notice that my Rangey immediately runs to 1500rpm before dropping back.
When I start my next engine I am going to be faced with this problem, so I am going to force oil through the pump and oil galleys from the oil cooler ports first, making sure that oil comes out of the rockers. Then I'll start it and hope!
Chris.
When I start my next engine I am going to be faced with this problem, so I am going to force oil through the pump and oil galleys from the oil cooler ports first, making sure that oil comes out of the rockers. Then I'll start it and hope!
Chris.
--
Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
Re: rover 4.6 oil pump priming
As I said above, mine did not get pressure on cranking - not until it fired up - make sure your sender etc works first.
Re: rover 4.6 oil pump priming
Could you pack it with Vaseline - same as you do with the old one?
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
- SimpleSimon
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Re: rover 4.6 oil pump priming
Most serp trochoidal style pumps prime soon as the engine fires/runs (new builds) unlike the earlier gear type pumps , I have managed to prime the later serp system on a new build RV8 with a packed with bearing lube/guard mounted on the engine stand and no cylinder heads fitted just by slowly rotating crankshaft but I had brim filled the filter etc cranking alone even with no plugs seldom make pressure on a previously opened up oiling system on a serp
TVR Chimaera RV8 Mods & Megasquirt
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Re: rover 4.6 oil pump priming
Overfill it to the level of the crank and it should prime quickly.
Then, drain it back to run the motor.
Then, drain it back to run the motor.
Cheers,
John
John
Re: rover 4.6 oil pump priming
As mentioned above crank driven oil pumps don't normally prime when cranking, need to be started! This can be quite nerve wrecking, from memory mine took about 5 to 10 seconds for the oil pressure to build, but his feels like an eternity.
It's actually more damaging to your cam to do prolonged cranking so best to just start and keep an eagle eye on your pressure gauge/light.
When the light goes out, take a rocker cover off and with the engine running check you have oil weeping out the rockers, this will take a little longer still.
Tom.
It's actually more damaging to your cam to do prolonged cranking so best to just start and keep an eagle eye on your pressure gauge/light.
When the light goes out, take a rocker cover off and with the engine running check you have oil weeping out the rockers, this will take a little longer still.
Tom.
Dax Rush 4.6 supercharged V8 MSII
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Re: rover 4.6 oil pump priming
thanks everyone, always good to know its not just me.....
I finally got some oil pressure after quite a few short busts a cranking with no plugs in, then finally firing it up...…
The oil pressure now does sometime go off the scale on the gauge, but so does the fuel tank gauge, so i'm also thinking theres a short somewhere to under the dash.
regards
scott
I finally got some oil pressure after quite a few short busts a cranking with no plugs in, then finally firing it up...…
The oil pressure now does sometime go off the scale on the gauge, but so does the fuel tank gauge, so i'm also thinking theres a short somewhere to under the dash.
regards
scott
Re: rover 4.6 oil pump priming
I think the Thor oil pump runs over 50psi which is epic.
Chris.
Chris.
--
Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
Series IIA 4.6 V8
R/R P38 4.6 V8
R/R L405 4.4 SDV8
Re: rover 4.6 oil pump priming
True. But no RV8 is prone to running big end bearings, so the original pump more than adequate? Interesting that few cars are fitted with an oil pressure gauge these days.
Dave
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
London SW
Rover SD1 VDP EFI
MegaSquirt2 V3
EDIS8
Tech Edge 2Y
Re: rover 4.6 oil pump priming
There is no such thing as a Thor oil pump - that is an induction system. All 4.0/4.6 engines Gems or Thor or whatever have the same oil pump - it runs about the same pressure as the old camshaft driven pumps - about 30 -35psi when warm on a good engine.
Garry
Garry