Oil from the road draft tube

[Pearsebln]

Hello

Iam olaf and life in germany ( first sorry my bad english)

I own a 48 desoto whit 236.6 engine.

I hope u can help me to find the curse of my problem.

I lose oil from the draft tube.

Its not so much smoke...when i start the engine,after 15 seconds the oil starts to run out the pipe.

The engine runs well no exaust smoke no noises.

i feel no pulsation in the tube

Today i will check the compression

Maby there is somthing clogged so the oil can not pass back to the oil pan,

But why is oil in this sektion?

Does have anyone a picture that explained the circuit?

Thank u olaf

[Andydodge]

Olaf, gidday from sunny South Grafton NSW Australia..and no need to apologise re your English.....I'll bet its MUCH better than my German........btw do you know Capt Fred who posts on here?.......lol.......great to see another mopar fan on this forum, the best one on the net........re your draft tube oil problem, I would check the oil filler cap to see if its clogged, also undo the draft tube and clean it out as it maybe clogged........other more knowledgable guys will be able to give more intelligent answers than me so hold on for more info..........lol..........anyway have you got a pic of your car ?.......regards, andyd

[Merle Coggins]

It sounds to me that the oil drains in the valve tapped area are plugged. Pull off the valve covers on the side of the engine and clean out the sludge. There should be a couple of holes that allow the oil to drain back to the sump.

Merle

[Don Coatney]

How much oil is in your crankcase?

As Merle said if the oil drain back ports are plugged it could be an issue. But I do not recall if there is a direct port between the valve service area and the draft tube.

[greg g]

Becareful if you decide to clean out the valve galley pictured above. Most of that residue it from leaded gas and contains a lot of lead, so use some care when if yours has a large build up.

Usually liquid oil being pushed from the breather tube is a result of air pressure building up in the crank case from compression blow by, usually the result of worn rings. A simple compression test will indicate the condition of the rings. Even so most of that over pressure should be relieved through the oil filler breather as air wants to rise when it gets heated, and will take the path of least resistance. So check to see that your cap is clean and allows air to flow.

I also have a simple suggestion. Clean up the area real well so you can actually see if the oil is coming out of the tube or just dripping down it from another leak, like the valve access panel gasket leaking.

Spray it down with some general purpose cleaner, then rinse ti down with your garden hose, get it good and clean, then start your engine ad do a good visual inspection.

Where are you located? CaptFred is in the Berlin area I believe.

But check the oil level and the condition of the breather cap as they are the easiest to do.

Welcome aboard. If you can post some photos of your Desoto, alway nice to have alok at other folks cars.

[Pearsebln]

thank u for all the engagement,

first,yes i know fred and his plymouth he lives in the same city.

the oil cap is clean i have the same with is taken away (open oil filler tube)

and yes,me engine locks like the pic.but more dirty.

i clean the cranksektion and the valves two days long and take care especelly

for the draft drain to the valve like Merle told.

that was also my first thought when i saw the oil incrustation.

but know i am not sure enough if i realy found all of the drains.

is there a discriptions of the drains or theventilations system at all.

in my desperation i close today the draft tube hole on the engine block whit a seald whasher.

and also i build a long tube from the oil filler tube to the ground of the car.

so i can drive some miles until i found the cause of the problem.

i think it will not increase the pressure in the engine so much corse one tube is open at all.

please correkt me if i am wrong.

today i couldn´t do the compression test on time,

maby tomorrow

i will post some pic in the next day´s

thank u all

olaf

[greg g]

I would not run it with the draft tube sealed. How much oil is coming out there??? Are you haveing to add oil regularly? Remember the engine is an air pump and it pumps air on both sided of the pistons, obviously not as much on the crankcase side but still enough to over pressure the case, and might make your problem worse. wire a beer can to the end to catch the flow, but keep the tube on.

[Pearsebln]

Hi greg

I think around 5 liter(1,5 gallone) per 50km (30milles)

Its so much oil....a beer can are just enough for the next corner.

Surley u are right but i have the other side(oil filler tube) open.

Musn't that be a enough?

Do i am wrong if i mean that both tubes( oil filler and draft tube) lead to the same area?

I have to know the exakt oil drains to find the corse.....

Were comes the oil that cumulate in the draft tube opening? There is no need for oiling

When i disamble the draft tube ,i can see the oil level increase in the opening chamber....15sec after starting the engine.

Were comes it from?

Thank u olaf

Edited November 2, 2011 by Pearsebln

[Don Coatney]

Your engine holds 1.25 gallons of oil. If you are leaking 1.5 gallons in 30 miles your engine would be out of oil and quit running. I dont have an answer for this.

Does the leaking oil smell of petrol?

[Pearsebln]

Ok,

Maybe 1gallone

The oil was empty....i fill 4,5 liter (dount know how much is it in gallone,maybe 1gallone)

i drive ca.30 miles ,have no odometer.

And than i realise i lose my oil pressure.

I check the oil dip an see the oil was empty.

That was the beginning of my problems

No,the oil do not smell of petrol

It seems like the oil pump pumps the oil to the draft tube,i have no idea....very strange.

Olaf

[Don Coatney]

Ok,

Maybe 1gallone

The oil was empty....i fill 4,5 liter (dount know how much is it in gallone,maybe 1gallone)

i drive ca.30 miles ,have no odometer.

And than i realise i lose my oil pressure.

I check the oil dip an see the oil was empty.

That was the beginning of my problems

No,the oil do not smell of petrol

It seems like the oil pump pumps the oil to the draft tube,i have no idea....very strange.

Olaf

Call Fred and have him help you with this problem.

[greg g]

I would not drive the car untill this problem is found. Is there oil anywhere else under the car???

[Pearsebln]

No,just from the draft tube

[Chester Brzostowski]

It seems logical that your oil is not draining properly back into the oil pan. You really need to clean out the valve area and the oil pan. I agree with all.., don’t drive until you resolve this problem or you will likely do more damage then good.

See link below…

http://www.chetscoins.com/1948p15/20045/11062004.htm

I would remove the intake and exhaust manifolds and then remove the valve covers and use a wet dry vac, and scrub brush to suck out all the slug. Drop the oil pan and clean out as much as possible.

Good Luck, Chet…

[Pearsebln]

Today i check my compression.

82,5

82,5

78

88

78

82,5

I think that is ok.....

I will open the valve area again and search for the drain

Thank u olaf

[Chester Brzostowski]

Olaf,

You need to pay attention to the rear area by the vent tube. As stated I would clean the entire valve area and the pan but in the least you need to get the slug out of the rear valve area especially the area that the red arrows are pointing to. You can use solvent and then clean out the pan when you are finished.

Your compression is good so maybe take the time to clean as much slug out of the engine as you can. The work will be worth it in the long run. If you remove the manifolds you will have a better view as to what is happening in this area. I would bet that you could easily remove 375ml of sludge from that engine.

Good luck, Chet…

[TodFitch]

... I would bet that you could easily remove 375ml of sludge from that engine. …

That sounds awfully precise. Sure it isn't at least 376 ml?

With how the valve galleries looked on an earlier photo, I'd really want to clean out the pan and especially the filter screen in the sump.

[Chester Brzostowski]

That sounds awfully precise. Sure it isn't at least 376 ml?

With how the valve galleries looked on an earlier photo, I'd really want to clean out the pan and especially the filter screen in the sump.

Tod,

Since Olaf is on the metric system I thought that would be more meaningful then ½ a quart. You are right the valve galleries are also very important to provide good lubrication to the valve stems. I don’t remember but there may be a drain hole in the back by the vent tube. The point being is, and as you know…, slug is not our friend and with a part-time filter system these engines can accumulate a great deal of the same over the years.

Chet…

[greg g]

hey Chet I believe you have your idioms mixed

Slug

Sludge (in this case German type BMW)

[Pearsebln]

Thank u chester for the picture

I cleand this area 4days ago even befor i post the first time in this forum here

I opend the oil pan and the valve blocks

My engine looks more slimey like on all the pics togther

I realise that the oil cant drain back to the pan.

After i have done the job i am shure the oil lose By the draft tube will stoped.

But unfortunely not.

I think i hvend found all the drain holes.....shure the valve drain is a big hole....thats open.

But maby there are especelydrain holes in the draft tube.

I will open the valve case again .

Capt.fred know the problem corse he know the pre orner.

Thank u olaf

[Andydodge]

Olaf........I'd blame Capt Fred............lol..........andyd

[Chester Brzostowski]

hey Chet I believe you have your idioms mixed

Slug

Sludge (in this case German type BMW)

Thanks Greg,

I can read these things over a hundred times and I only see what I want to say and not what I wrote.

Based on Olaf's explanation maybe a slug did take up residence.

Olaf,

The tube is easy to remove you might be able to see inside as to what is happening. Maybe even run the motor with the vent tube off you might be able to see where the oil is coming from. The same with the valve cover off ?

Chet...

[Chester Brzostowski]

Here is a stretch.

How is your motor sitting? How are your rear motor mounts? When I put in new they really lifted the back of my engine. Maybe the motor is angled to much to the rear causing oil to puddle in the rear by the vent tube. Or maybe there is another oil drain in the rear by the vent tube. Just putting some thoughts out there.

Chet…

[Joe Flanagan]

Olaf, did you remove the intake and exhaust manifolds? This would make the job much easier, plus you'd be able to see everything much better.

[Pearsebln]

Hi chester

Cool,that is somethink i am also haved tninking

Because the rear axle is a little lower ,the pre owner jused lowering blocks

This and the old motor mounts can cause of the problem.

I tell what i do.....i lift the back of my car whit my car lifter about 5degrees

And will loke what happend