Come on tech heads!
Discussion
Well being an engineer i would only advise on turning the pump the direction it is designed to operate in.
As running the oposite way could damage the pump. Possibly needing a replacment.
If the pump is operated the wrong way pressure could build up and ruin the non return valve (if fitted) The non return valve prevents oil draining through the pump when the engines is not running and hence leaves the pump full of oil and therefore no moisture can attack the inside workings of the pump.
By having a no return valve in the pump or system could allow air to be present in the system.
>> Edited by stc_bennett on Thursday 4th April 21:16
As running the oposite way could damage the pump. Possibly needing a replacment.
If the pump is operated the wrong way pressure could build up and ruin the non return valve (if fitted) The non return valve prevents oil draining through the pump when the engines is not running and hence leaves the pump full of oil and therefore no moisture can attack the inside workings of the pump.
By having a no return valve in the pump or system could allow air to be present in the system.
>> Edited by stc_bennett on Thursday 4th April 21:16
I would recommend taking it to a dealer. IIRC, this engine was running with zero oil pressure for several minutes. In addition to the lack of oil pressure and the potentially scrapped engine, there is now the chance that the oil pump is knackered. It sounds as if attempting a home remedy is making it more expensive by the day.
I hate handing over cash to the dealers as much as the next man but the reason I do is so that I don't make it more expensive in the long run.
I hate handing over cash to the dealers as much as the next man but the reason I do is so that I don't make it more expensive in the long run.
I presume this is a V8 engine? If so, there's no non-return valve in the oil pump. There is a pressure relief valve; if this sticks open (and the Rover motor is famous for doing this), then you get no oil pressure.
The oil pump is driven by the distributor shaft; the distributor only runs one way and that's the way the oil pump needs to turn, otherwise, yes, it pumps the other way and would probably drain the pump housing. The Rover oil pump is incapable of self-priming; every rebuild manual suggests you pack it with vaseline so it can create enough vacuum to suck the oil through on first start-up. The drill idea is much better; eliminates any potential for crank bearing wear if the oil takes a while to come through. Best way to do it is whip off one of the rocker covers, apply drill and watch for oil delivery at the rockers. Then you know it's primed.
My car came with a thick history file showing two visits to a garage because of no oil pressure. First time they unstuck the relief valve, second time they fitted a new pump. In all the time I've owned it (18 months/ 8000 miles), it's never played up and it goes like a train. However, I've just stripped the engine and found the crank bearings are Donald Ducked, presumably due to that oil pressure loss 2 years ago. I had no idea there was any problem till I went looking for it.
Rimmer Brothers (01522 568000) do an uprated oil pressure relief valve spring that gives you another 10 psi, and also a tool for coupling your drill to the oil pump.
W.
The oil pump is driven by the distributor shaft; the distributor only runs one way and that's the way the oil pump needs to turn, otherwise, yes, it pumps the other way and would probably drain the pump housing. The Rover oil pump is incapable of self-priming; every rebuild manual suggests you pack it with vaseline so it can create enough vacuum to suck the oil through on first start-up. The drill idea is much better; eliminates any potential for crank bearing wear if the oil takes a while to come through. Best way to do it is whip off one of the rocker covers, apply drill and watch for oil delivery at the rockers. Then you know it's primed.
My car came with a thick history file showing two visits to a garage because of no oil pressure. First time they unstuck the relief valve, second time they fitted a new pump. In all the time I've owned it (18 months/ 8000 miles), it's never played up and it goes like a train. However, I've just stripped the engine and found the crank bearings are Donald Ducked, presumably due to that oil pressure loss 2 years ago. I had no idea there was any problem till I went looking for it.
Rimmer Brothers (01522 568000) do an uprated oil pressure relief valve spring that gives you another 10 psi, and also a tool for coupling your drill to the oil pump.
W.
Gassing Station | General TVR Stuff & Gossip | Top of Page | What's New | My Stuff