No oil in oiltank or filter!? first start in 20+ years

[juanbenae]

did the 912 even have an oil tank like the 911? could be a plumbing issue.

[fanaudical]

Some pictures of the engine installation and lines to / from the oil tank would be helpful.

[stownsen914]

In the first post the OP mentioned it's a 70T engine, and that it has an oil tank. Not sure how this could be a 912 engine but who knows? Agreed that a pic of the installation would be a good start here. Something fundamental is off.

[fanaudical]

Post #16 mentions that the engine came out of a 912 that had been swapped; agreed - something is off / not right and I think it will take pics to figure it out.

[ed mayo]

The oil filter console bolted t o the oil tank may be oriented wrong.

[elgh33]

[elgh33]

thats how it looks, everything ****ty i know haaha..

[raspritz]

Better photos of the entire engine would be very helpful. Yes, there is an oil tank (which 912s do not have), and I don't think it is a 912 engine. How many cylinders/spark plugs does it have, 4 or 6?

[rokemester]

Ha this is a fun thread. An awful lot of air space in the engine bay!,

[stownsen914]

That's a 911 engine for sure.

@elgh33 was anything apart during the car's 20 year slumber? (or unknown perhaps?) What ed mayo is referring to is an easy mistake to make on the oil filter console that bolts to the tank. It can be clocked incorrectly, causing the oil passages to be blocked and not pass oil to the tank. Which matches what you are reporting.

[john walker's workshop]

Hard to do when the bolt holes are not evenly spaced. Porsche's effort to try to save us from ourselves.

[elgh33]

Originally Posted by stownsen914

That's a 911 engine for sure.

@elgh33 was anything apart during the car's 20 year slumber? (or unknown perhaps?) What ed mayo is referring to is an easy mistake to make on the oil filter console that bolts to the tank. It can be clocked incorrectly, causing the oil passages to be blocked and not pass oil to the tank. Which matches what you are reporting.

Will check that today for sure, engine was all complete, and carburators was taped shut and exhaust ports too

[elgh33]

Originally Posted by rokemester

Ha this is a fun thread. An awful lot of air space in the engine bay!,

Why is it funny? I want to know all running gear works before i strip the car down again,

Thats why engine tins are not mounted yet

[Tea Tray]

If your new oil filter paper element is dry after running the engine for several minutes and you drained 9+ liters from the sump, then the problem is:
1. Plugged inlet into the suction side of the scavenge section of the oil pump. Our oil pumps are positive displacement gear pumps and a blocked suction side turns the oil pump into a gear type vacuum pump resulting in zero/near zero oil flow.
2. Plugged/mostly plugged oil return lines to the filter/tank. Since there is no safety valve aka relief valve in the pressure/return side of the scavenge circuit, a gear pump can/will build enormous/destructive pressure very quickly with a blocked outlet provided the suction side is clear. Damage can be a twisted off pump shaft or drive component, blown out shaft seal if equipped, or a cracked oil pump housing. I’ve seen all of these in aircraft and industrial hydraulics.
3. Crazy plumbing. The scavenge side output fitting is on the driver side of the engine down in the sump area (on my 3.2). You might consider photos or a complete sketch of the piping from the engine to the oil tank.
I think it would be wise to install a mechanical oil pressure gauge to make sure you have lube oil pressure.

[john walker's workshop]

Originally Posted by elgh33

Will check that today for sure, engine was all complete, and carburators was taped shut and exhaust ports too

Like I posted, it only goes on one way due to the bolt spacing. Does anyone ever read the posts?

[stownsen914]

Good info from John Walker. I've heard of people having this issue though. I wonder how they managed to do it?

To Tea Tray's comment, if there were a true blockage after the pump, massive pressure would build since there isn't a relief valve in the scavenge side of the system. I've heard of blown oil lines and coolers. And you don't have that hear.

Random question - was the oil pickup tube in place when you examined the sump screen? (It would be odd for it to not be, but who knows.)

[E Sully]

I'm not familiar with this year oil system but the hose with the 90 fitting and loop going to the bottom of the oil tank doesn't look right to me. From what I see in the PET, it should be (18) 901 107 720 01. This looks more like (19) 901 107 301 12 which is a breather hose in the PET.

[ed mayo]

John, I say that because I thought the oiling holes were different between SWB tanks and LWB tanks?

[gled49]

The hose in question is #19. Oil tank to pressure pump inside the engine. Just a really poor application of that hose. Hose #18 is part of the scavenger system, return side oil pump, thru hose, thru pipe inside oil tank to oil filter than into tank. Problem has to be in return side system.

[raspritz]

I remain puzzled why the OP (who apparently is still monitoring this thread) still has not posted lots of good photos showing all the elements of the oil system? Why make folks here play 20 Questions trying to guess the problem?