crossflow 4.1 oil pump?

[Anonymous]

Mmmmmkay...

My XF 4.1 (Efi) loses a load of oil pressure after 20minutes running time.
Can anyone point me in the right direction of finding out what causes it?

The few ideas I have are:
I'm not sure if its meant to have a driveshaft going from the distributor to the oil pump, it dosnt have one...
Can I lift the engine up while its in the car and drop the oil sump down enough to replace it?
If I have to take the engine out, by the time Im finished fooling around with it, I might as well have dropped a 351 in...

 

[MustangSix]

It needs a driveshaft. The hex shaft from the distributor is what turns the pump. If it is missing a shaft, you can drop one in thru the distributor hole. However, absent a shaft, I don't see how it would build any pressure to begin with.

 

[Vaughano]

Let us know if you manage to get the sump off in the car, I've often wondered if this is possible in the falcons.

I did this once in my datsun 180b, installed new rings, bearings and SSS head in a day. Petty the rear main seal was stuffed!!!

 

[Anonymous]

I'll let you know.
I'm thinking the best way would be to unbolt the driveshaft, trans, and eng mounts, then lift'n'tilt back a bit while the cars on blocks.

Update on the oil pressure problem:

If I drive it like a granny, it keeps pressure up for a bit, around an hour, but give it a bit of rev loving, and it drops quite quickly, which then leads to stalling every now and again.

Is:
The oil not circulating well enough?
Maybe its getting pumped into the engine, then not enough being left in the sump?
Maybe no oil pickup?

I know one thing about the engine, that the guy that had the car before me installed a new head on it (acording to him), while it dosnt burn oil, dosnt leak water, no seepage around the head, is it possible the oil gallery could have been blocked somehow?

And do these '86 efi alloy head engine have a hex shaft to drive the pump?
When I pulled the dissy out awhile ago, I didnt see any way the distributor could drive the pump.


Oh and vaughano, I heard from a mate that the engine comes up far enough in the car to beable to drop the sump, rwach in, undo the pump, then take the sump and pump out, reverse for getting it back in.
Might be the easiest way I guess.
Im just paranoid about the engine falling on my hand while Im fixing in the sump...

 

[Anonymous]

It needs a driveshaft. The hex shaft from the distributor is what turns the pump. If it is missing a shaft, you can drop one in thru the distributor hole. However, absent a shaft, I don't see how it would build any pressure to begin with.

Thats whats got me stumped, I dont think I saw the hex shaft at all, I looked for it before putting the dissy back in (maybe I was looking with my eyes shut though).
Its only got pressure when its first turned on for the day (in the morning), after that, it loses pressure.

 

[Vaughano]

Im just paranoid about the engine falling on my hand while Im fixing in the sump...

On the datto I unfastened the mounts from the frame and put wooden blocks under the mounts. This may or may not be possible on the ford.

I jacked under the sump, so I had no choice but to support the engine this way in order to remove the sump.

 

[MustangSix]

Thats whats got me stumped, I dont think I saw the hex shaft at all, I looked for it before putting the dissy back in (maybe I was looking with my eyes shut though).
Its only got pressure when its first turned on for the day (in the morning), after that, it loses pressure.

It's in there. It it weren't, you'd have no oil pressure ever.

Generally speaking, when you have an engine tht has pressure cold but loses it as it heats up, the bearings are worn and there's too much clearance.