GalinhoATT

Just replaced fuel pump from under rear right seat (in tank). My question is this:

Well first a statement then question actually. It appears as if the pump and pump housing are just laying in the tank, held in place by the two spring loaded posts of the pump housings "top". I apologize in advance for any mis labeled parts. When I removed the 8mm bolts, pried off the lid and then released the lock collar, The top was able to be pried off with the seal. What I saw next surprised me. The pump and fuel level sender attached were just laying in the tank. The housing (white) that the actual electric pump was in was filled with gas and the entire thing was submerged such that the electrical connectors (including the actual connecting tab which needs to be detached to change pump) were all covered in gas. first time changing a pump so I just want to make sure this is normal.

MY question then is... is it normal that when I put in the new pump, the electrical connectors inside the housing are in contact with gasoline. It would seem at all times. I didnt want to install the battery until I knew for sure. It appears as if I have done everything as it were. Just need some piece of mind.

thanks

bbirdwell

You need the proper proportion of oxygen and a spark for an explosion. With a sealed tank, the mixture is too rich to ignite in the tank. Close the tank, start the engine, and enjoy your car.

You can actually drop a lit cigarette into a bucket of gasoline and the liquid will extinguish the cigarette rather than exploding as expected. I don't recommend it, but I've seen it done.

Strigoi

I've done that before. It always puts it out.

kajtek1

This is the connector I removed from inside the tank of our 2001 ML55.
No wonder the car would not start. Regardless lot of cranking, no fire.
Still even the car was long after warranty, MB USA gladly paid for new pump.

Maroc_Specops

a wonder it didnt explode with all the gasoline.

Kamisama

Gasoline is wet - it will put out a flame. It's the gas that explodes. Spark an empty tank and you will likely have an explosion, but a submerged pump or connector is generally safe.