Priming the oil pump on a 4.2
Discussion
How??!?!
The engine is back in and filled with oil as is the oil filter but I can't get any pressure when I turn it over on the starter (fuel pump relay removed)
I have read this thread thread and it seem that the oil plumbing mentioned is somewhat different to mine.
I have one connection to the block on the near side which connects to the oil filter and from there to the oil cooler. The other line from the oil cooler connects to the offside of the engine at the oil pump by the pressure relief valve housing. That's it, two connections and one drain plug.
I have an oil syringe and have tried pushing oil into the pump side of the connection on the offside, but none would go in. I have done the same on the engine block connection on the nearside and a litre of oil went in there quite easily though a fair amount pissed back out when I disconnected the syringe.
Neither of these has made the slightest difference to the lack of pressure on cranking. I am getting desperate as I need to get it running and MOT'd by the end of the week, so any suggestions would be gratefully received.
The engine is back in and filled with oil as is the oil filter but I can't get any pressure when I turn it over on the starter (fuel pump relay removed)
I have read this thread thread and it seem that the oil plumbing mentioned is somewhat different to mine.
I have one connection to the block on the near side which connects to the oil filter and from there to the oil cooler. The other line from the oil cooler connects to the offside of the engine at the oil pump by the pressure relief valve housing. That's it, two connections and one drain plug.
I have an oil syringe and have tried pushing oil into the pump side of the connection on the offside, but none would go in. I have done the same on the engine block connection on the nearside and a litre of oil went in there quite easily though a fair amount pissed back out when I disconnected the syringe.
Neither of these has made the slightest difference to the lack of pressure on cranking. I am getting desperate as I need to get it running and MOT'd by the end of the week, so any suggestions would be gratefully received.
longbow said:
Voila.... hand drill pump from Machine Mart, only costs around £10 from memory.......
I have tried both and it doesn't seem to make any difference. I bought a cheap drill powered pump but it produces next to no pressure so I guess it isn't man enough.
Ah ok... well that pic was taken looking forward so yes, you need to find the feed into the block on the filter side i.e. disconnect the hose that goes from the filter to the block and attach the output from the drill pump to that block tapping. My drill pump generated so much pressure that it initially blew the hose off (messy!) but I certainly did get pressure registering on the gauge from the drill pump. All this said, you should still generate pressure from cranking the engine over on the starter, so if you're not there is likely something amiss somewhere.......
Oh, and there is no harm in priming backward the other way too if you want but it's probably overkill unless you're working with a freshly rebuilt and 'dry' engine like I was.
Oh, and there is no harm in priming backward the other way too if you want but it's probably overkill unless you're working with a freshly rebuilt and 'dry' engine like I was.
Edited by longbow on Tuesday 10th July 18:27
longbow said:
Ah ok... well that pic was taken looking forward so yes, you need to find the feed into the block on the filter side i.e. disconnect the hose that goes from the filter to the block and attach the output from the drill pump to that block tapping. My drill pump generated so much pressure that it initially blew the hose off (messy!) but I certainly did get pressure registering on the gauge from the drill pump. All this said, you should still generate pressure from cranking the engine over on the starter, so if you're not there is likely something amiss somewhere.......
Oh, and there is no harm in priming backward the other way too if you want but it's probably overkill unless you're working with a freshly rebuilt and 'dry' engine like I was.
Excellent - thanks for that Windsor, much appreciated!Oh, and there is no harm in priming backward the other way too if you want but it's probably overkill unless you're working with a freshly rebuilt and 'dry' engine like I was.
Edited by longbow on Tuesday 10th July 18:27
Scarily the advice I received from my local TVR indie was to just run the engine for 20 seconds (providing its not a dry build!). I went to try that this evening only to find the fuel pump isn't running.
However I much prefer the idea of pre-priming the pump before firing it up so I wil lget a better drill pump and do it your way.
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