Starting after engine rebuild, oil pressure
Discussion
Hope someone can help, I have primed the oil pump by turning over with plugs out and no fuel and the orange oil warning light went out, also about 0.8 ltr of oil came out of the sump (topped up) so I assumed it was primed. Now it's starts fine but the oil pressure guage is not registering anything. Only turned it over for a couple of second and blipped the throttle to see if the pressure would come up. Where does the oil pressure guage attach, same place as the oil warning light (next to filter)? Or have I really got no pressure!?!
Confused about 0.8 litre coming out of sump?
Oils pressure sender is on bottom of block in front of sump [don't have a picture, anybody?] there should be a single black wire attached to the terminal.
I shouldn't think you have any problem TBH as it does take a few seconds to start to register following a strip down but best be sure. You could attach a 'wet gauge' in place of the sender if your in doubt.
Oils pressure sender is on bottom of block in front of sump [don't have a picture, anybody?] there should be a single black wire attached to the terminal.
I shouldn't think you have any problem TBH as it does take a few seconds to start to register following a strip down but best be sure. You could attach a 'wet gauge' in place of the sender if your in doubt.
Also found that disconnecting the wire to the pressure switch on the bottom of the engine had no effect on the oil warning lights. So I disconnected the wire above the oil filter under the alternator, and sure enough the oil pressure lights didn't come on! So if the gauge and the lights use a different sensor then maybe the switch on tvr voting of the engine is stuck after bing on my garage floor for two months!
Hi TVart
There are two oil pressure senders one for the warning light and one for the gauge.If the warning light is going out then you must have at least 10 pounds of pressure. You can check the gauge sender by shorting the wire that is connected to it to earth and the gauge will register. This sender is by the oil filter.
I have assumed that you have a Rover V8 car Griff or Chim
There are two oil pressure senders one for the warning light and one for the gauge.If the warning light is going out then you must have at least 10 pounds of pressure. You can check the gauge sender by shorting the wire that is connected to it to earth and the gauge will register. This sender is by the oil filter.
I have assumed that you have a Rover V8 car Griff or Chim
That's right, a griffith. I have tested the gauge by shorting the wire to earth, it went up fairly slowly to full mark on the gauge. Should the gauge move if the light goes out then? Are the two senders on a different part of the circuit? I was thinking maybe there is a blockage in the oil ways somewhere!
I removed a Conrod and piston to check it and now I am worrying I put the bearings back the wrong way round etc... May have to drop the sump and check the oil pick up pipe and the bearing. Also heard the pressure release valve could be stuck open?
I removed a Conrod and piston to check it and now I am worrying I put the bearings back the wrong way round etc... May have to drop the sump and check the oil pick up pipe and the bearing. Also heard the pressure release valve could be stuck open?
The big end caps are handed and only go in one direction.
They have a sort of nodule in the casting that you can see from the underside.
4 point one way and 4 the other way.
The shells only fit in one way as the small protrusion fit in the con rod and end cap.
Do check the oil pick up pipe but if the oil pressure light goes out and stays out you must have at least 7-8 lbs iirc.
If you are checking the pick up pipe, make sure that you have a new gasket on it. I also use a smear of Hylomar and a touch of thread lock on the bolts.
They have a sort of nodule in the casting that you can see from the underside.
4 point one way and 4 the other way.
The shells only fit in one way as the small protrusion fit in the con rod and end cap.
Do check the oil pick up pipe but if the oil pressure light goes out and stays out you must have at least 7-8 lbs iirc.
If you are checking the pick up pipe, make sure that you have a new gasket on it. I also use a smear of Hylomar and a touch of thread lock on the bolts.
yeah I didn't touch the pick up pipe, so a change of gasket could be an idea!
I realised last night that i torqued the sump bolts to the torque for no gasket (as per LR manual) and some of the gasket (up to 5mm) has been squeezed out of the side of the sump on the outside, so the chance that it has done this on the inside and maybe a piece has come off and blocked the pick up has to be considerable!
At least i have some oil pressure so im hopefully not killing the engine, not ran it for more than 1 min total with cranking
and thanks for setting my mind at rest over the bearing, didnt think i could be that stupid!
I realised last night that i torqued the sump bolts to the torque for no gasket (as per LR manual) and some of the gasket (up to 5mm) has been squeezed out of the side of the sump on the outside, so the chance that it has done this on the inside and maybe a piece has come off and blocked the pick up has to be considerable!
At least i have some oil pressure so im hopefully not killing the engine, not ran it for more than 1 min total with cranking
and thanks for setting my mind at rest over the bearing, didnt think i could be that stupid!
Well dropped the sump and filter etc tonight. There is definetaly oil above the filter and in the engine, cam was covered every lobe had drips on, pistons and crank were all wet.
Pick up pipe seemed secure. Found that the cork gasket had broken up a little and a couple of bits were in the sump along with a few bits of fibre (cloth) which was probably me cleaning the piston tops. Plus three flakes of metal, very thin and kind of rusty looking on one side, didn't look like part of a machined face. There was however some white residue like you get with the mayonnaise on the oil cap... So checked water for oil and it seemed fine, maybe it's just from the moisture that got into the block when I lifted the intake manifold.
Pick up pipe seemed secure. Found that the cork gasket had broken up a little and a couple of bits were in the sump along with a few bits of fibre (cloth) which was probably me cleaning the piston tops. Plus three flakes of metal, very thin and kind of rusty looking on one side, didn't look like part of a machined face. There was however some white residue like you get with the mayonnaise on the oil cap... So checked water for oil and it seemed fine, maybe it's just from the moisture that got into the block when I lifted the intake manifold.
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