Looking for ideas. Zero oil pressure T4

[aeromech]

Guys,
I've been asked by a Father and Son who live near me to help them get their rebuilt 1700 T4 running via my engine run stand. So far the engine is mounted, the spark plugs removed, and I have a VDO oil pressure sender plumbed into the case. The engine has been serviced with oil. So, before I ever try and start an engine I always pre-oil it by cranking until I get an oil pressure rise. In this case I get nothing.

Things I've tried:

1) Forced 1/2 quart oil into the engine through the oil pressure switch port
2) Removed and primed oil filter
3) Cranked engine with filter removed = small outflow of oil
4) Removed bypass plunger and spring = looks normal
5) Cranked engine with plunger removed = small outflow of oil
6) Checked plunger side play in bore = has some play and could be better
7) Removed VDO sender and installed gauge = no oil pressure
Removed gauge and cranked = small flow of oil out of hose

The engine was rebuilt by a local shop several years ago and never ran. I've included pics of the receipts showing what they did. Be aware that their receipt is more like a list of available parts and services and does not show only what they received. It's kind of like a laundry list. I have no idea what EDM easy out means. There is a T4 oil pump installed. Anyone have any ideas on what I can try next short of pulling out the oil pump which is a lot of work?

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[whip618]

There are at least three different oil pickups for the the type IV engine, it is possible that the o-ring was left off of the pickup tube where it inserts into the oil gallery or the builder used a pickup tube that was to short.

I think the "EDM easy out" means the builder snapped off an ez-out while removing a broken stud or bolt and used "Electrical Discharge Machining" to burn out the remains of the ez-out. EDM is an actual machining process used to generate unusually shaped contours and holes in various metals and also works well to remove broken taps and in this case an ez-out.

Phil
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[aeromech]

[raygreenwood]

You picture is missing a couple of letters on the left hand side. What does LD 26mm oil pump mean?
Meaning old oil pump...original 26mm oil pump?

They also full flowed the system from the second page. I am assuming this means that that plugged the oil pump outlet port in either case or pump and rerouted the oil. Check the plumbing routes. Make sure they are correct and that there is a main oil outlet for the pump.

Also make sure the pump is, even engaged and turning. Ray

[aeromech]

You picture is missing a couple of letters on the left hand side. What does LD 26mm oil pump mean?

Ray,
When I first looked at the receipt which was emailed to me, I was confused like you are until I figured out that this shop is basically just using a long list of available parts and services and then just uses part of it for what they actually do. This list appears to be a T1 list which they used and this is a T4 engine. So they list "full flow" but in this case you wouldn't "full flow" a T4 case. I think this has all been pretty poorly done and I don't have much confidence that the shop could have done a great job on this T4 engine.

I have no idea what the LD means. Maybe rebuild or something? Clearly the first letters are missing.
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[busdaddy]

I think it says H.D. oil pump, the side of the cutoff H looks like an L.

Can't offer too much else here Gary, you've done everthing I would have.
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[aeromech]

Thanks Mark,
Just so you know... Robbie has been making fun of you in another thread.
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[busdaddy]

Could you rule out a bad pickup O ring by overfilling the oil so it's submerged?
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[aeromech]

[1967250s]

You know what you have to do! Pull the oil pump and inspect. If that doesn't fix it, I suppose seeing if the oil pickup is correct is next, then take out the bolts holding the pickup, move the pickup to see if the o-ring is there. Boy, you do get the interesting cases don't you? Maybe overfilling will work.
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[notchboy]

My first thought was pump. You are in a tough spot without verifying the source - the pump.
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[aeromech]

[Tcash]

May be possible they packed the pump for initial prime and the grease is solid now.
Tcash

[1967250s]

[aeromech]

Damn, it could just be as simple as old grease. I'm hating the thought of having to go that deep and remove the pump. I wonder is there's a way to flush it out? I already forced about 1/2 quart of oil down the oil pressure switch hole. I guess I could drain the sump and continue that hoping to soften up the grease. Thoughts?
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound

[notchboy]

Use a heat gun to heat the outside of the pump?
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[aeromech]

[Tcash]

[Clatter]

FWIW, you could remove the sump plate and see if the pickup tube could be 'rattled around' in it's reciever hole..?

That might show if the o-ring was left out..

Make sure and post up what you end up finding - Inquiring minds want to know!

The 'small amount of oil' makes me think packed full of dried grease..
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[aeromech]