"Venting" the CRD's fuel tank?

DnA Diesel · **Posted:** Sat Jan 20, 2007 4:46 pm

Is there a way of "venting" the CRD's fuel tank (like us VW TDI guys do) while filling, so it fills faster/fuller?

Cheers,
Duey

oldnavy · **Posted:** Sat Jan 20, 2007 5:00 pm

DnA Diesel wrote:

Is there a way of "venting" the CRD's fuel tank (like us VW TDI guys do) while filling, so it fills faster/fuller?

Cheers,
Duey

This is not like the older VW's and require venting for an extra couple of gallons, it does vent and all you need to do is just pump slower to prevent the heavy foaming that prematurely causes the tank to fill and cut the pump off early.

DnA Diesel · **Posted:** Sat Jan 20, 2007 5:05 pm

It seems to take forever, the last bit of the tank/filler tube is very slow, Matt. Is there some restriction in the vent line somewhere that can be enlarged?

oldnavy · **Posted:** Sat Jan 20, 2007 5:21 pm

DnA Diesel wrote:

It seems to take forever, the last bit of the tank/filler tube is very slow, Matt. Is there some restriction in the vent line somewhere that can be enlarged?

Not without making a completely new filler tube to go from tank to filler door. I actually was looking at the filling problem at the dealer this week and the removal of the CRD fuel nozzel restrictor, I had hoped to have a spare filler to take the restrictor out of so as to do change out for others here. Seems the whole dang tube from top to bottom is sold as one piece and north of a $100 to buy. So much for the folks who don't have the tools or know how to do the job, they have to suffer with the restrictor.

RFCRD · **Posted:** Sat Jan 20, 2007 5:30 pm

oldnavy wrote:

DnA Diesel wrote:

So much for the folks who don't have the tools or know how to do the job, they have to suffer with the restrictor.

All it takes is basic hand tools and @ 1/2 hour. Simple hand drill and a dremmel with a sander drum to clean-up the roughness (which could be done with a 1/2 round file and sandpaper). It's about a 2 on a 10 scale for difficulty.

On the vent tube, I believe it's attached to the side of the filler pipe. Terminates just above the hose clamp holding the filler pipe to the fuel hose leading to the tank.

oldnavy · **Posted:** Sat Jan 20, 2007 5:52 pm

RFCRD wrote:

oldnavy wrote:

"DnA Diesel"]So much for the folks who don't have the tools or know how to do the job, they have to suffer with the restrictor.

All it takes is basic hand tools and @ 1/2 hour. Simple hand drill and a dremmel with a sander drum to clean-up the roughness (which could be done with a 1/2 round file and sandpaper). It's about a 2 on a 10 scale for difficulty.

On the vent tube, I believe it's attached to the side of the filler pipe. Terminates just above the hose clamp holding the filler pipe to the fuel hose leading to the tank.

For you and I it is no big deal, for many here it is a scary venture. I had to install a outside temp sensor for a friend yesterday that required about 10 minutes of my time, but my friend is maxed out when changing a light bulb in a lamp. I have all the tools, work space in a large garage to do the work. Many people here will be lucky to even have a drive way because they live in an apartment, let alone any tools.

Also the dealer sell the thing as a whole assembly, you can't just buy the filler pipe head that you actually cut the restrictor out of for some stupid reason.

DnA Diesel · **Posted:** Sat Jan 20, 2007 6:00 pm

Matt, by restrictor, are you talking about the steel plate about 1 1/2" down from the fillertube lip that allows only an automotive-sized nozzle? I'd take that out no problem if it would speed up the fill, but I figure there's more to it, like RF alludes to. Can we come up with a CRD equivalent to the "ventectomy"? Given that moy most involved bit on the TDI was a TB change and a full intake cleaning, the vent bit sounds like a walk in the park?

Cheers,
Duey

oldnavy · **Posted:** Sat Jan 20, 2007 6:04 pm

DnA Diesel wrote:

Matt, by restrictor, are you talking about the steel plate about 1 1/2" down from the fillertube lip that allows only an automotive-sized nozzle? I'd take that out no problem if it would speed up the fill, but I figure there's more to it, like RF alludes to. Can we come up with a CRD equivalent to the "ventectomy"? Given that moy most involved bit on the TDI was a TB change and a full intake cleaning, the vent bit sounds like a walk in the park?

Cheers,
Duey

That is the restrictor everyone is talking about. It does not help anyway other then allowing for a bigger nozzle to be used. There is no venting on the CRD.

RFCRD · **Posted:** Sat Jan 20, 2007 9:08 pm

DnA Diesel wrote:

Matt, by restrictor, are you talking about the steel plate about 1 1/2" down from the fillertube lip that allows only an automotive-sized nozzle? I'd take that out no problem if it would speed up the fill, but I figure there's more to it, like RF alludes to. Can we come up with a CRD equivalent to the "ventectomy"? Given that moy most involved bit on the TDI was a TB change and a full intake cleaning, the vent bit sounds like a walk in the park?

Cheers,
Duey

Removing the restrictor is nothing more than cutting the plastic base plate and removing this with the metal flapper (which will fall out). The hardest part is separating the filler pipe assy from the fuel tank hose because it take some grunt and it's in a akward location. Having a second person to assist would help. I suppose you could do this job with the filler pipe in place but you will get getting plastic cutting into the tank.

The only thing you will gain is a larger opening to accept the larger diameter pump nozzles. You won't be able to fuel any faster as the filler pipe is only @ 3/4 inch in diameter. I did this because a couple of the stations where I fuel only have one diesel pump with a small nozzle on one side and big nozzle on the other. This was it makes no difference which side of the pump I use.

spoonplugger1 · **Posted:** Sat Jan 20, 2007 9:13 pm

My '05 shuts of when full, no foaming. If you really work at it you might get almost an extra qt to go in.

DnA Diesel · **Posted:** Sat Jan 20, 2007 9:20 pm

RFCRD wrote:

DnA Diesel wrote:

Matt, by restrictor, are you talking about the steel plate about 1 1/2" down from the fillertube lip that allows only an automotive-sized nozzle? I'd take that out no problem if it would speed up the fill, but I figure there's more to it, like RF alludes to. Can we come up with a CRD equivalent to the "ventectomy"? Given that moy most involved bit on the TDI was a TB change and a full intake cleaning, the vent bit sounds like a walk in the park?

Cheers,
Duey

Removing the restrictor is nothing more than cutting the plastic base plate and removing this with the metal flapper (which will fall out). The hardest part is separating the filler pipe assy from the fuel tank hose because it take some grunt and it's in a akward location. Having a second person to assist would help. I suppose you could do this job with the filler pipe in place but you will get getting plastic cutting into the tank.

The only thing you will gain is a larger opening to accept the larger diameter pump nozzles. You won't be able to fuel any faster as the filler pipe is only @ 3/4 inch in diameter. I did this because a couple of the stations where I fuel only have one diesel pump with a small nozzle on one side and big nozzle on the other. This was it makes no difference which side of the pump I use.

Thanks, RF. Like Oldnavy said, I guess there is nothing to be gained. On our TDI's, there was a vent line built in that would keep a 2Gal airspace in the tank...more for the gassers than TDI's since diesel has a very low vapour pressure compared to gas, and a totally full tank doesn't negatively affect the TDI's fuelling system.

Thanks guys.

Duey

RFCRD · **Posted:** Sat Jan 20, 2007 9:31 pm

DnA Diesel wrote:

Thanks, RF. Like Oldnavy said, I guess there is nothing to be gained. On our TDI's, there was a vent line built in that would keep a 2Gal airspace in the tank...more for the gassers than TDI's since diesel has a very low vapour pressure compared to gas, and a totally full tank doesn't negatively affect the TDI's fuelling system.

Thanks guys.

Duey

I was thinking while removing the restrictor plate....That quarter panel with the filler tube has a very large open area that could easily take an auxillary tank. Chop the filler pipe to direct fill the aux tank which would be a flow-through gravity feed the main tank. I would bet you could easily get another 5 gallons if you could keep it from coming out the vent hose.

"Venting" the CRD's fuel tank?

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