[pow216]

Right guys the tank on my TDI is 55 litres. My first tank I did 560 miles, I did about 10 miles after petrol light came on. (er diesel light).

After my ventectomy (easy and painless!), i had driven about 10 miles at most on after the light came on and she now took all of 59.5 litres. (plus I reckon there was perhaps 6 still left in the tank). Now I've done 616 miles on this tank and she still is indicating just under 1/4.

This is a wicked mod, so the poll is how many of you guys have done it too?

http://www.tdiclub.com/

 

[hornetrider]

explain!

clearly not venting the tank as in pushing the vent inside the filler?

 

[RichieDan]

Yeah please explain. Perhaps less right footus helps too! lol.

I vent my tank when going on a long run, but its best not to vent to much when fuel is cold at start of what could be a hot summers day.

But please explain what you mean?

 

[T-bone]

what is this venting??

 

[RichieDan]

When you open the fuel filler cap, if you look just inside the hole, you will see a black tab sticking out of the side, this is the expansion tank vent (think thats what it is called) but when your fuel gets up to nearly coming out, press the tab down and watch the fuel dissappear down the hole and you can get some more juice in. I can get another ?5er in my tank doing that.

 

[Rye]

I have this on my PETROL car.. is that normal?

 

[Milkfloat]

Yes its normal. The liquid will expand in hot weather, so it is there to allow the expansion. You should never do unless you are going to use enough enough fuel to empty the expansion tank in your next journey.

 

[RichieDan]

I think its perfectly normal as the fuel will expand and contract due to temerature fluctuations, so it has to be able to vent if the pressure got too high.

 

[pow216]

VENTECTOMY is when the internals of the vent valve are permanently removed so your tank increases in capacity (the expansion tank is now also filled), the extra capacity is thought to be around 10 litres.

For some pictures:-

http://pics2.tdiclub.com/gwillie/VW/ventectomy/index.htm

It should only be done on diesels!!!!!

 

[NikB]

Don't see the point personally, just go to a filling station, it's not like there's not enough in this country.

 

[Milkfloat]

Sounds pretty dangerous to me, especially on a petrol car. if you really need the capacity, then just vent the tank manually. You diesel guys can drive for 100000 miles without refueling anyway.

 

[andymac]

Nice, lads I think all the bikers on her will be really gratefull, the vent is there for a reason if the tank is brimming and there is no expansion then you can get fuelspills especially on roundabout exits, diesel spills Kill and injure bikers every year on corners and roundabouts.

 

[Ricardo]

Not voted as dont have the car any more but did vent with my Golf a couple of times coming back from Europe with the massively cheaper fuel over there.

Looking for the same thing on my new Volvo for my possible trip over to France at Easter

 

[pow216]

@ andymac

it's been thoroughly tested in the Arizona sun, no leaks . . .

 

[simch]

agree with andymac. diesel spills kill! leave well alone what vw designed for a reason imo.

 

[Foxy]

leave it!

 

[Jace]

I've been doing this for the last 12mths at least, but as RichieDan rightly says, only do it if your doing long runs. my daily commute is 70miles, so for me its only there for a day at the most.

Andymac is correct diesel spills do kill, but I believe the biggest contributor to this is HGV's, not mk4 TDI's.

 

[02 Bora]

I never fill the car up, so i have never felt the need to use the 'vent'.

The display in my Passat tells me the approximate mileage left from the fuel in the tank.

 

[davemk]

hmmm, is it me or is there no point to doing this???

 

[simch]

Quote: posted by davemk on 11/03/2005 15:30:46

hmmm, is it me or is there no point to doing this???

Its not you!![]