[W126 Coupe] very big petrol smell in my 500 SEC

[Dick Spellman]

Hello Alejandro,

Your email subject includes the words 'petrol smell' so it is possible 
you have a fuel leak at either the fuel pumps in the rear or at the fuel 
distributor or fuel lines up on the intake manifold.  I would have the 
car inspected by someone who can quickly diagnose the problem where the 
car sits if at all possible.  Do not drive the car as it may be a 
serious leak.  If you see a puddle of fuel on the ground at the rear of 
the car then it's the pumps, filter or seals that are in need of 
service.  If no liquid petrol is present in the rear, I would open the 
hood, remove the air cleaner housing exposing the intake manifold and 
look for any signs of petrol such as wet or shiny surfaces in and around 
this area.  Follow the two petrol lines from the intake down the inside 
front fender and look for leakage under this area as well.

A more subtle petrol smell that fills the car interior when driving is 
typically the petrol filler cap and possibly a bad EHA seal or the 
actual EHA unit needing replacement and located on the backside of the 
fuel distributor.

If by some chance you are referring to an exhaust leak, then an 
inspection of the exhaust system should turn up the source of the leak 
and I would expect the exhaust noise would also be louder which you do 
not mention.

Good luck.

Dick

alejandro carreras wrote:

> Thank you for your comments-

> First of all, as I was born in Argentina,my main language is 

> "castellano" and may be as I tried to explain very deeply the problem 

> was not clear.

> I'll try to make it shorter-

> At the same garage I have a 250SE 1967, 170 Sb 1952, and the gorgeous 

> 500. When starting the 250 and 170, I can breathe normally. Of course 

> before starting the engines I open the windows and the main door 

> remains wide open aswell, and I switch on a big fan to remove the air, 

> and there is NO PROBLEM AT ALL. But when starting the 500 even with 

> every air outlet open plus fan it is impossible to breath. I KNOW 

> THAT  IS NO GOOD TO BE IN A GARAGE WITH THE ENGINES ON.

> My question is if anybody can tell me the origin of the problem, 

> because what happens with the 500 IS NOT NORMAL.

>  

> Thank for your first reply, but I still have the problem.

>  

>  

>  

>

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