"Reserve" tank

Azbubu

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Do vehicles really have a reserve tank as in a tank that's separate from you main fuel tank or is it just a name for when your petrol is running low.

Also, let's say you have a 45L tank, does that include the "reserve" or is the reserve different therefore meaning your tank capacity is actually larger.
 
I would think its just a level indicator, there is no tank within a tank.That would not be practical.
 
In the old days and I am now talking mid 50's VW Beetles had a reserve tank that you had to switch over to, and I'm pretty sure that others had it as well.

Nowadays the "reserve" bit is just when the needle hits the red line on your guage - no separate tank at all.
 
Yes the reserve now just means that you're really low on fuel.

In my old car - I could do another 30 to 50km after the OBC said I had 0km left.

There is just one tank and nothing more.
 
I think in e30 BMWs there is a seperate reserve tank behind the back seat, infact I am certain there is a seperate reserve tank behind the seat.
 
Yeah in modern cars it's one single tank and generally just a level indicator.


And your total tank volume includes that reserve value.
 
no you are mistaken, two tanks

I am typing this slowly, so that you can read it better...There is only O N E tank in a BMW

Now, let's talk about fuel tank senders. On the E36 BMW there are two of them (I still haven't completely figured out why), one on the left side and one on the right side, which is integrated into the fuel pump. The procedure for the replacement of the fuel sender on the left side is identical to the procedure for replacement of the fuel pump on the right side.
http://www.pelicanparts.com/bmw/techarticles/E36-Fuel-Pump/E36-Fuel-Pump.htm
Two senders ONE tank.
 
Last edited:
and I am going to type slowly again, there are two tanks in the e 3 0 BMW

I even attached the reference, did you bother clicking on it like I bothered clicking and reading through your two?
 
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