Smell of gas inside cabin - Baby Benz W201 1992 2.0 M102.962

[kramalleb]

Hi everyone, first post here - sorry if I am not posting to the correct category/thread.

I own a W201 190E 2.0 with the engine code M102.962 and for the last two weeks, I've been smelling gas inside the cabin - however only very rare occasions - both times I've smelled it I happened to gotten fuel the night before - same tonight, I only filled up the tank last night so wondering if it could be related?

No smell of gas outside the car at all though which is very interesting - went around the car and couldn't smell it other than the in trunk and inside the cabin.

Checked the hose lines in the engine bay, as well as underneath the car near the end and nothing is leaking that I can see.

Has anyone came across similar issues before? Where should I be looking first to try and track this down?

Thanks so much, any help much appreciated!

 

[star]

Take the air filter case off, inspect the fuel governor which is bolted to the metering head, they leak.

 

[DREAMER NO2]

Yes, and if they do leak then fuel is vented into the rocker box or valve cover ...this will eventualy get down in to the sump to dilute engine oil .

 

[star]

Yes, and if they do leak then fuel is vented into the rocker box or valve cover ...this will eventualy get down in to the sump to dilute engine oil .

Fuel just drips from unit but can’t get into engine as it’s external.

 

[DREAMER NO2]

Star know anything about these ? Fuel regulator will vent fuel via tube into rocker box . Star if diaphragm is leaking inside https://www.onlinecarparts.co.uk/ca...on-w124/438/10370/fuel-pressure-regulator.htm

 

[star]

Star know anything about these ? Fuel regulator will vent fuel via tube into rocker box . Star if diaphragm is leaking inside https://www.onlinecarparts.co.uk/ca...on-w124/438/10370/fuel-pressure-regulator.htm

Only been working on them for 30plus years. You’re talking about the wrong part and I’ve never seen a regulator leak. The fuel governor which is bolted to the metering head.

 

[DREAMER NO2]

So that 20 years less than i have ..never known that part be called a govorner You are talking about the EHA valve then they do leak and it will be visable by just looking at the side of FD as fuel will leak from the side of the meterin head or fuel distribTtutor. The "O" rings inside the EHA can be replaced on their own .

 

[star]

You must be well old then. The internal (inside)rings? Do you mean the sealing o rings ( green) as in my picture. I have never opened one as I thought they were sealed from factory.

 

[DREAMER NO2]

Well crap i missed a gap ,so nice of you to show that up . And yes there are rubber rings inside that you can replace ,,,but i recon you did not knew that . Ho and i put the gap right above just for you . So Star where is you garage ? .

 

[star]

Thanks I'll take a look at a leaking one on Monday, I still can't see how they come apart but I'll report back. We’re in Reading.

 

[DREAMER NO2]

So that 20 years less than i have ..never known that part be called a govorner You are talking about the EHA valve then they do leak and it will be visable by just looking at the side of FD as fuel will leak from the side of the meterin head or fuel distribTtutor. The "O" rings inside the EHA can be replaced on their own .

The EHA valve will leak fuel , . The o rings are in the EHA valve leaking fuel from the out side of fuel distributor Mercedes systems are mostly the same including the EHA valve we talk aboutleaking fuel from side of fuel distributor mercedes w124 leaking fuel from side of fuel distributor mercedes w124

 

[DREAMER NO2]

Most systems are the same . And leaking fuel from side of fuel distributor on mercedes due to O ring failure in the EHA
leaking fuel from side of fuel distributor mercedes w124

 

[DREAMER NO2]

The location

 

[DREAMER NO2]

"O" Rings for the job

 

[star]

Those sealing o rings aren't internal, they are on the mating face. They do leak internally.

 

[rayhennig]

Those sealing o rings aren't internal, they are on the mating face. They do leak internally.

Yes and yes. and whichever source of the leak, it's most unlikely to get into the engine. Quantities are small and it'll evaporate off. Not good though.

This after 27 years with my M104 engine. Mine leaked years ago so Ireplaced the O-rings. No good. Replaced the governor - yes, MB calls it that.

R

 

[DREAMER NO2]

Ok i give up governor it is ,,first time i have ever heard anyone that knows anything about Mercedes injection, call the EHA a governor . Its like one of the forum i use , the other day a guy said he had replaced all the candles ..what are they ?

 

[rayhennig]

e had replaced all the candles ..what are they

Haha. Maybe he's French or German. Spark plugs: Bougies/Zündkerzen. Also glow plugs - bougies de préchauffage/Glühkerzen.

Candles = Bougies/Kerzen.

R

 

[DREAMER NO2]

No he was an American .

 

[S500 Pete]

Ok i give up governor it is ,,first time i have ever heard anyone that knows anything about Mercedes injection, call the EHA a governor . Its like one of the forum i use , the other day a guy said he had replaced all the candles ..what are they ?

Were there four of them?