Oil dripping below 123ignition

[Far2002]

Hi guys

does Anyone experienced oil dripping below the dizzy from the hole. What may cause this. I got a catch can.

thanks 

[adawil2002]

That is oil getting past the 2 O-rings into the circuit board.

 

Can send it back to 123 USA & have the milled spindle installed. That will prevent the oil intrusion into the circuit board.

[Far2002]

I think oil passing trough inside the dizzy.. living in France it won’t be Easy to send it

[dlacey]

whats happening with your crankcase breather... oil is being forced into the dizzy...there must be pressure somehwere there shouldnt be.

[Far2002]

Crankcase breather is Connected to a catchcan and after gas goes directly to air 

[Far2002]

Engine was rebuilt 2 years ago with 292 schrick and tii pistons

[TobyB]

If you look at older threads, it's a design failure on the part of the 124.

 

The original distributors have a spiral milled into the shaft to move oil back down.

The 122 does not, but also does not have any other provision for sealing the shaft.

 

It would be an interesting exercise to try to correct the omission on a lathe- with a milling head.

Or a Dremel rigged as a milling head.

Or just cut a thread of a very coarse pitch with a very small round-tipped cutter.

 

The other possibility, which is less likely, is that the drain hole on the distributor

well is blocked somehow, allowing pressure to build.  Shine a light down there,

and pour a bit of oil in- it should drain out, kinda slowly, through a hole drilled at an angle

towards the bottom of the housing.  If you used RTV on the housing gasket, that could do it...

 

t

should add a 124 to the fleet.

 

 

[Far2002]

Thanks Toby i found a picture of the 123 modified So i will try to make mine like this.

in the mine Time just to be sure that there is not an engine failure(Wich would be crazy as i don’t have oil consumption) i ordered a tool to make a compression measurement.

[eviction_party]

So the spiral in the stock dizzy shaft acts like a reverse Archimedes screw to pump oil down, out of the distributor? 
 

Clever!

[Far2002]

Correct! I don’t understand why 123 removed the spiral. I dont think it was present in the stock bosch dizzy only for fun….

[Son of Marty]

While you have the distributor out check the drain hole for the  distributor drive gear, there's a small hole on the exhaust side between the housing and head, try fishing a small wire through until you see it on the other side, I'm not saying the lack or grooves  isn't your problem but this could be adding to it.

Edited September 2, 2022 by Son of Marty

[Far2002]

I Son of Marty When you say « on the other side » is this mean i need to remove the crank case cover ?

[Son of Marty]

Yeah you'd need to pull the valve cover it's easy to do.

[Far2002]

Just now, Son of Marty said:

Yeah you'd need to pull the valve cover it's easy to do.

Thanks ?

[Mike Self]

4 hours ago, eviction_party said:

So the spiral in the stock dizzy shaft acts like a reverse Archimedes screw to pump oil down, out of the distributor? 

Before the days of modern shaft seals, reverse screw threads were used on crankshaft pulleys--for example--to sling oil back into the engine when it tried to creep out from the front or rear crankshaft main bearings.  

 

My '56 Renault still has a pulley with a slinger--I've since replaced it with one from a 57 that has a smooth surface for a seal--but the flywheel end has the slinger grooves machined into the crank's surface, just inboard of the flywheel flange. 

 

mike