Depressurising fuel tank?

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MikeV8SE

MikeV8SE

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OK, I need to change the fuel sender in the RR and with the new sender unit and pump (its a 1991 model) it says in the instructions I need to depressurise the tank prior to removing the pump and sender unit.

Do I actually need to do this, and if so how do I go about it??

Cheers!
 
MikeV8SE said:
OK, I need to change the fuel sender in the RR and with the new sender unit and pump (its a 1991 model) it says in the instructions I need to depressurise the tank prior to removing the pump and sender unit.

Do I actually need to do this, and if so how do I go about it??

Cheers!
Click to expand...

Take the filler cap off. Are you sure it's not depressurise fuel system?
 
Wammers - could be, i'll double check! If the tank, will just take the cap off. Hopefully thats all it needs!

Tank must be nearly dry - I put £50 in last time and it's done 220 miles since, so can't have much left!!
 
Just re-read the instructions, need to depressurise the system, not the tank! How on earth do I do that??
 
Silly question - take it off where? The pump? Is it gonna fire fuel out at me?

Also, IIRC, there's two pipes going into the pump - which does what, and which one do I remove?

Amateur mechanic - yep!! Learn by doing, eh?
 
one is to engine and the other is return.

I would take it of by the fuel filter by the back wheel.

it will run up yer arm but apart form that you will be ok, just dont smoke :p
 
Stupid question, but why do you need a return pipe? Surely the fuel gets burnt, and any unburnt fuel ends up in the exhaust to pop and bang on the overrun?! :D
 
Its a pressurised fuel line in a loop that pumps constantly which is why if you convert to lpg you should always keep a min of 1/4 tank otherwise it can get hot also it would be difficult to keep even distribution to all eight cylinders if it was a single rail
 
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