Open banjo nut on the IP

[junker68]

Hi,

Got the greasecar kit out.

I have the car running. After the engine warms up, it revs out of control. So high that I can't shut the car off with the key/gorilla knob, I have to remove the intake hose and shut off the air supply.

I did a search and I'm going to try to tackle some issues. But, please feel free to offer suggestions.

As I was looking over the IP, I noticed that there is a banjo fitting on the back of the IP by the engine block. It is open ended and at this time attaches to nothing. In the photo it is right below the middle glow plug.

Sorry for the quality of the photo.

Anyone have any idea what the line attaches to.

Thanks in advance,

Dwayne

[junker68]

Sometimes I should search rather than post.

A schematic shows it to be an overflow pipe. My guess is that it does not attach to anything?

Can anyone confirm this?

Thanks,

Dwayne

[toomany MBZ]

Are you able to provide a better pic of the IP banjo bolt in question? The one I can see is attached, on later models the other end goes to the three way banjo bolt on top of the fuel filter housing.

What car? I'm going to go with a 1968. The red cap is for oil to the IP, modern units have an oil line instead.

[Diesel911]

Tell use exactly what Year and Model you have and if the Engine has been changed or replaced tell us the Engine.

this is kind of a generic instruction; disconnect what ever linkages attach to the actual Throttle lever on the Fuel Injection Pump. If the Engine still reeves up like that it is not an issue with the Linkages.
I would try moving the Throttle Lever on the IP by hand to see what happens.

If this is a Fuel Injection Pump with a Pneumatic Governor I would suspect something wrong with that.

If this is a Car that has sat somewhere for a long time it is entirely possible for the Fuel Rack to stick inside of the Fuel Injection Pump.

Make sure this Fuel Injection Pump has Oil in it as it is not lubricated by Oil from the Engine.

If this Fuel Injection Pump is has a Pneumatic Governor and the Oil Fill Cap/Vent is plugged it will mess with the Function of the Governor as it needs to be vented. Try running it without out the Oil Fill Cap.

[junker68]

It's a 1974 240d.

I looked at a schematic and it is listed as a overflow pipe.

In relation to the picture, the banjo fitting has a u shaped metal line attached which is about 1" long - u shaped and has an open end.

I'm trying to diagnose a run away engine - idle problem.

I took off the cover/housing for the governor and found the diaphragm is ripped.

So now I am going to start a new thread and see if anyone else has ventured into doing this.

I am currently unable to get the diaphragm out and wanted to know if I had to remove another housing.

Thanks,

Dwayne

[toomany MBZ]

After consulting the epc, the closest thing I can relate to is called a breather.

Part #615 070 00 80.

Tiny pics, I know.

The chassis number is 115.117.

[junker68]

Yep, that's it.

That website is great, wish I could access it.

Tried a million times, oh well.

Thanks for the reply.

Wish I could buy everyone a drink at the local ginmill with all of the help everyone provides.

Dwayne

[toomany MBZ]

You're welcome.

EPC-net Online

Its getting worse. I had some space partitioned here on the iMac for Windows XP with Java 6.

I understand Windows 7 or newer has issues.

Perhaps a local shop can fabricate something for you.

[Govert]

It is indeed a breather/overflow tube. It has nothing to do with the speed of the diesel engine.

[funola]

Reving out of control possible causes:

1. Bad IP internals or external (linkage stuck?)

2. Engine oil level too high fuel sucked in through the rings.

3. Too much blowby getting into intake.

Not sure if a torn IP diaphragm dumps fuel into the crankcase. If so, check oil level and if high or smells like diesel you found the problem.

[Govert]

A torn IP diaphragm causes a runaway engine, because the vacuum generated by the venturi in the intake manifold cannot "pull" on the diaphragm. An air leak on this pneumatic governor causes high rpm or a runaway engine.

[junker68]

The IP has a torn diaphragm, I started a new topic and I'm
just waiting for the part to arrive.
If you have any additional advice on it's safe removal,
I'd love to hear it.
Thanks in advance!
Dwayne

[Diesel911]

When you remove the Diaphragm don't scratch up the area of the Housing where the outer Aluminum Ring on the new Diaphragm seats.

[junker68]

Thanks, I'll be careful