oil pump question
Turbo Mini Forums

how long should it take on average for the oil to come out the block outlet when cranking over with plugs out

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"Can I legally marry people now that I am ordained in the Church of the SubGenius?" aka i know jack sh"t

i also make things

i love coming home to chrome

about 15 20 secs

always looking for them bigger bunches of bannanas

Just finished my first engine (re)build. After carefully stripping and reassembling, it started first time .
The ecstasy quickly turned to agony when I realised the oil pressure light wasn't going out .
It must've run for 30 seconds or so, so from the above post could there be something else wrong?
To cut a long story short I didn't fill the new oil pump before fitting it (must've missed that in the Haynes), so is there a way of rectifying this without pulling the engine and stripping it down again?
I have been told taking the filter off and pumping oil into the little hole from my Wesco can, while pushing the car backwards (while in fourth gear) will draw oil back into the pump - I've tried this for half an hour this evening and managed to dribble a trail of oil in the street. Does this really work - should I persevere tomorrow with this?
Its an MPi by the way.
I did paint it red though (got that bit right!)
Thanks for your help.

I always pack a new pump with Vaseline(not grease) as this helps it to prime on startup.The Vaseline just dissolves in the oil afterwards.

Sure you have the O-Ring in the gearbox/block joint?

Back filling is what I did.

If something is worth doing, it's worth doing half of.

Cam lube in the oil pump and back filling, almost instant oil pressure from a new engine. Back filling alone should work okay though.

I just oil the pump before fitting and back fill done properly you get oilpressure the same as you would if the engine has already run

Yes i moved to the darkside

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I did fill my pump with build lubricant too.

If something is worth doing, it's worth doing half of.

as above
plugs out, in neutral, remove the pipe going from the block to oil filter, get a rubber hose that fits in that threaded hole the top LHS, fill the hose with oil and turn the engin backwards while keeping the hose topped off a funnel works well

also take your oil filter off and fill it with oil let it sit the top it off then fit also if you have an oil cooler fill that up aswell

migh be over kill trying to get that much oil in the engine but if its been running for a min with no oil pressure then it will need all the help it can get imo

there is a tool the threads in the oil light threads and it pushes oil into the block but the above works well

Yeah i built my oil pressure without plugs. I usually like to do it before the engine goes into the car but it means draining and refilling the oil with pot joints.

If something is worth doing, it's worth doing half of.

ive got the frame out so will have it all built up suspension and the rest just drop the body over it when its time for me

slater - yes I put the O-ring in, between the gearbox and the block. I did notice when fitting the paper gasket that the hole at this location was smaller than the O-ring, so fitted the O-ring into the recess then the paper gasket (the three gaskets for the block/gearbox in the engine gasket set threw me for a bit until searching on here) with instant gasket to locate the gaskets.
What I'm saying is, the O-ring will be squashed between the underside of the gasket and the bottom of the recess. Could this be the problem?
I should have added it's an MPi so don't think the pipe from the block to the filter housing applies?
I'll persevere with trying to back fill (plugs out, fuel pump fuse out, 4th gear pushing the car backwards while squirting oil into the small hole @ 7 o-clock beside the threaded filter hole) today and see if the opinion is I need to pull the engine.

One other observation - after the engine ran I checked the oil level. Normally after an oil change, after the engine has run I need to top up the level (oil filter being filled). This wasn't necessary i.e. no oil lifted from the sump, so I'm taking it that the oil pressure switch is okay.

Thanks for the help - I was so chuffed when the engine fired straight up. I guess it was too much to hope for it to be perfect! Every day's a school day, as they say :)

Do you have a pressure guage? Are you sure its not just a dodgy switch? Or! I have seen the wrong connector(usually the oil temp) plugged onto the oil switch.

could have a problem about that o ring being on the gasket as it may suck air

never seen a mpi block so not sure on the oil passageways but the main thing to do is get oil into the pump

if you like rather than pushing the car you can jack one side of the car leaveing say the driver side on the ground and turning the free wheel over that is done in 4th gear and the wheel going opiste to normal road direction

Sprocket, I had wondered if the switch was U/S, hence my observation about the oil level.
I'll check the connection again to make sure though, that the right wire is to the right switch (so many bloody wires on an mpi!).
I've just managed to get through to Ian, at Green & Whites - he tells me to try and back fill through the large (threaded) centre hole, where the filter screws on to, so I'll give that a go next.
Turbo This - I did think about raising one wheel but wasn't sure I'd get enough leverage. At least then the oil drips would all be in one place!

I'd be concerned about the O-ring not having contact with the metal faces on both sides.

I always use plenty of gasket sealant around that area, prevents problems arising.

Engine pulled, pump filled, reassembled and put back in.
I'll finish connecting it up tomorrow and hopefully have oil pressure!

I just filled mine with assembly lube

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

using liquid gasket sealant it asking for trouble in my opinion!

all you have to do is check the block and gear box are flat and dont have raised bits
the gasket and rubber o ring is plenty to seal it id have thought

Never had a problem with the stuff as long as you're careful with application, prevention is easier than cure!

Engine running :)
Water pump leaking :(
Much easier fix though.

sweet as well done cant wait till ive sorted all the problems with mine and get it together