Interruttore Comando Pompe Benzina?

This sending unit has sprung an oil leak. My parts manual says it's part# 110664 - Interruttore Comando Pompe Benzina. Is this the oil pressure light sending unit? Any idea if it's compatible with some other part?

Al
Image Unavailable, Please Login

 

time to buy rosetta stone. i feel for you. please help somebody i want to know as well

 

Looks like they got the description wrong in your version of the parts manual, and it should be "INTERRUTTORE MINIMA PRESSIONE OLIO" in Italiano. See:

http://www.eurospares.co.uk/searchResult.asp?M=&Mo=&A=&B=&S=110664

Note how the 400GT (mechanical) application is the only 110664 entry with the "...BENZINA" (...gasoline) description -- the rest are as you guessed -- "SWITCH FOR OIL PRESSURE WARNING LIGHT" in either English or Italiano.

 

Steve, Now that Italian description seems to make some sense (to someone who doesn't know Italian).

I got the switch out today (see picture). It's leaking lots of oil around the base of the electrical connection . Ricambi America shows this part, # 110664, fits lots of cars (308GT4, 308, 308 QV, 308i, 328,Mondial 3.2, Mondial 8, Mondial QV, 288 GTO, 512BBi, 400i, 412, Testarosa). I hope that means when I call them Monday they'll have one in stock!

Al
Image Unavailable, Please Login

 

$38 at McCann's
$35 at Rutlands

 

Is it possible that the 400i uses this switch to shut off power to the electric fuel pump if the oil pressure drops to a minimum setting?

 

Interruttore comando pompa benzina is a switch controlling the fuel pumps. The comando luce pressione olio is the oil pressure warning light switch (not the oil pressure sensor which isa different device).

The defintions were crossed over in the older edition of the 400...

Marco

 

This switch prevents the fuel pumps from running if there is no oil pressure. When you turn the ignition on the swith is bypassed by a relay that allows the fuel pumps to run for around 20 seconds before switching the pumps off. This is enough to prim eteh carbs on a 400, or build lin epressure on teh 400i. When you start the engine the oil pressure builds and the switch then switches the pumps back on.

Simon

 

I ordered a new sending unit to replace my leaking one and they aren't quite the same. THe new one is on the left and you can see it is chamfered where the old one is 90 degrees. See arrow. My thought is I can machine that chamfer off to have it 90 degrees so it will work. Any thoughts on my doing this? Actually, I won't be doing it.... I'll need to find someone who can machine it for me.

Al
Image Unavailable, Please Login

 

What does Ricambi have to say about this?

 

I followed Dave's advice and ordered it from T. Rutlands. I've contacted them this morning and I'm waiting for a reply. I hope the answer isn't this is the part that's available but if it is then I'm thinking about where to go from there.

Al

 

Okay, it's possible they shipped you the wrong part. While they are always very helpful, I have had problems from time to time with the wrong parts shipped even though everything was spelled out clearly in an e-mail. They have always fixed the problem right away without any issues.

 

Hi Al,
Please allow me to apologize on behalf of T. Rutlands for any inconvenience. The 110664 sensor you received is exactly like the one off your car; Its just missing the aluminum crush washer. We buy these directly from Marelli and our most recent batch of 300 came without washers. Some other distributors with older inventory may still have some with the aluminum washer but my guess is that they will not be supplied with them in the future. While we are waiting for a response from the Italians our salesman should have added a 10280060 copper gasket to the order at no charge. These will now be repackaged with washers to avoid it being overlooked. Please contact me and I will be happy to send you the gasket free of charge.
Anytime you have a parts issue please contact me directly as opposed to our front line guys. I am usually available and as a fellow 400i owner I have a personal interest in making sure we provide issue free products.
Thanks, Lee

Just for fun I have taken a few pictures....
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login

 

Lee,

Thanks for the clarification. I pondered taking the washer off of the old one but that's easier said than done. I've sent you a PM.

Al

 

I should let everyone know that Lee @ T. Rutlands has addressed my issues and the new low oil pressure sending unit is now installed, working and not leaking oil like the old one did. Yea!

Now it's back to finding the oil leak that is somewhere on the back of the engine, drivers side, below the cam covers. Does anyone have a photo of the back of a 400i that has been removed and still has all it's accessories still attached?

Al

 

for what it's worth, i'm a big fan of both Lee and John at Rutlands. good guys, knowledgable, helpful, cool...

 

These pictures may help, but there isn't mutch there to leak.
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login

 

and a couple more
Image Unavailable, Please Login
Image Unavailable, Please Login

 

Simon, Thanks for the pix. There doesn't appear to be anything back there that I haven't felt or sort of seen. I say sort of seen because I've been using a small digital camera that I reach back behind the engine and take photos looking for the oil source. Adding to the difficulty is heat. My process has been: clean everything possible, run the engine for 10 minutes or so (oil will start dripping on the floor at that point), shut it off and either feel around or reach back there and take pictures. Both of these are difficult because I don't have asbestos arms. The oil drips down the driver side of the rear of the engine (see photo). So far the sources I have eliminated are; the cam cover, from between the cly head and the block. It doesn't run down the oil drain tube from the breather catch can. I think I will focus on the oil pressure sending unit.

Al
Image Unavailable, Please Login

 

+1!!

 

Anyway patience could be added to the mix for cooldown reasons?

 

Some more pics of a 400i engine
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login
Image Unavailable, Please Login

 

Al, I'd suggest you look at these places
Image Unavailable, Please Login

 

I waited for it to cool down at first but then I couldn't really tell where the oil was coming from. It would be easy if there was a big inspection hole in the firewall and I could just look but I have to feel around for where the oil might be coming from and after it cools down just isn't clear where it could be coming from. So I clean away all the oil prior to starting it up and then I try and feel for the first signs of oil back there in hopes to nail down where it's coming from.

 

Simon, Thanks for the photos and suggestions. It is not the oil pressure sending unit. I only have single distributor on the opposite side of the engine from where the leak is coming from so it's not the distributor. I've checked the connection of the hose from the oil breather catch can and it's tight. If it's pumping that much oil into the breather I'd be having big problems elsewhere anyhow.

Now I'm going to try something different. I thought about how I'd go about this with the small block chevy and fords I've messed with. With them I'd just take out the distributor and drive the oil pump with an electric drill. Well, that isn't going to work on the 400 but...... I'm going to try taking out the spark plugs, disconnect the coil and try spinning it over with the starter and see if I can get enough oil pressure to cause it to leak. I know I have to be careful of the starter motor so I'm not going to over do it.

Al