TD/GU fuel filter

Yeaaaah.

New motto when I leave here - " Tell sombody who cares ! "

Sounds good to me mate!

Looks like you got the info below you needed. Reckon it's worth the extra shillings? What made you think about changing over?

Want nothing but the best for my baby.

Haven't really made up m' mind yet. But I like the dual filter idea with the glass bowl, seems like value added security when I'm out in the big beyond. I got some deep and dirty places I want to go in the next few years before too many others discover 'em.

Genuine approx 6 micron, CAV approx 5.5 micron

Hi Paul,

Thanks for the info, I'll certainly consider the cheaper option since it's similar in size. Do you sell the adaptor that fits the nissan unit or do I need to replace the who assembly??

Hope you can answer a couple more questions. The cab chassis has what looks like a fuel tank vent that comes up near the fuel filler on both the main and aux tank. It's run to a plastic cap that fits over the outlet and is vented to atmos with no filter. Does this need a filter of some kind or does it only vent out and not in????

When I turn off my 4.2 turbo diesel GU it's quite rough, like when a petrol motor runs on. Is this normal for diesel???

Thanks again.

Scott, Dencos fuel tech replies-

Yes we sell the adaptor to fit the original filter head.

This ensures everything else remains original. We recommend to use genuine Delphi (CAV) filter with out adapter kits.

Micron rating is not the only thing to consider when choosing a filter. Some nongenuine brands have low efficiency ratings which allow a certain percentage of particals to bypass the paper.

Delphi (CAV) filters are 5.5 micron rated and start at approx 95% efficiency rating. This efficiency increases as the filter catches particals.

Some non genuine filters mentioned on these posts are less than 75% efficiency rated which means 25% of these particles can enter the fuel system.

Moral to the story is to use good quality filters and change only when necessary.

Thanks,

Good to get the info, looks like there is more to it than I first thought.

Do you know the answers to my other questions??

Thanks again

OOPS, second para should read
This ensures everything else remains original. We recommend to use genuine Delphi (CAV) filter with OUR adapter kits.

Will look back at your other Q's.

Thanks for that. Looking forward to your views on the other items as well.

Austravel, answers to your questions

"The cab chassis has what looks like a fuel tank vent that comes up near the fuel filler on both the main and aux tank. It's run to a plastic cap that fits over the outlet and is vented to atmos with no filter. Does this need a filter of some kind or does it only vent out and not in????"

A- would recommend a filter or baffle

"When I turn off my 4.2 turbo diesel GU it's quite rough, like when a petrol motor runs on. Is this normal for diesel??? "

A- this is possibly timing related. Its quite common if timinig has been advanced to improve power.
To fix this, try increasing idle speed by 50rpm

Hi,

Thanks for the info. I'll look for a suitable filter, pretty poor design. Thanks also for the hint on the rough stop, even though it's standard I'll certainly give your suggestion a go. It's sometimes that bad I think it'll damage the engine mount.

Thanks again.

Very true, this is what I was thinking. I guess the only saving would be if you were unlucky enough to get a few loads of dirty fuel and had to replace the genuine filters to often. I'm probably thinking of just sticking with genuine and be careful were I fill up.

That did happen to roly up the cape. They went thru that many they had to call ahead to get them to order some...

Ouch, can make it expensive if they are genuine.

I've just been quoted $60.oo at the local N distributor
$39.oo at Autobarn. I'm not sure of the specs on this one. Cheap doesen't = peace of mind
How long since you paid ~$20.

Your right, I didn't read that part properly. Genunine ones were $49 last time I brought one, Fleetguard are $22. If I can find out what the specs are on the genuine one I may change to fleetguard if they are the same. I'm told most of the coal mines use fleetguard up here so they should be ok.

How quickly does this filter. The only concern I'd have is if it's as slow as when used for oil then you could use the full tank before it's even filtered part of it. Good idea if it's quick, better than the CAV. Any info would be great.

It would not slow the flow, it has a toilet type roll filter, It has a huge surface area. Check out their web site,,

Have just tried to get on there site but can't get the products page, will try latter. What I was getting at is the the filter used like a bypass for oil, only taking a pecentage of the fluid to filter at any one time. If so then you could still be getting dirty fuel, if it's connected in series with the orginal filter then it won't do this. But then you'd need to know if it placed more head on the fuel pump.

sounds exactly the same as the Denco Cav Filter setup. $100 for theirs + free filters for board people.

- (PostID: 15989)
Paul from Denco Diesel and Turbo replied to the question

Denco Diesel sell these CAV filter assemblies with Primers and will throw in a spare replacement filter free of charge. The filter assemblies are $109.00 plus any fittings that you may need.

The Filter setup for engine oil has a brass fitting that has a 1mm hole so as to reduce the flow so it doesn't drop pressure in the engine oil galleries. It is exactly the same housing and element for fuel but it has full flow fittings. It can flow far more fuel than you could ever use and can be used inline and in front of your normal filter. When you remove the filter element you can see specks of rust and paint and other foriegn matter. its a great system. I used to be an agent for this system a few years ago and saw the results on many occasions.

Austravel, I tried that site also and couldn't get the products page so gave them a free call and spoke to some dude whose going to email me some "useful" data.
He was talking about putting an extra pump on the inlet line to boost the fuel pressure to 15psi because the filter is so effective and it would reduce flow unless boosted.
I'll wait until the info arrives before final comment but it doesn't look to be what I want, too complicated.

Thanks Richard, I'll have a look into that option, I'll see what filters they have at Whitworths, they're just down the road.

I'll get you the part number etc as it's not your standard boat part. Not expensive but it is an auotmotive part as opposed to marine.

I'll be down your way on the weekend (the ramp) so we may be able to catch up and you'll see what I mean first hand.

Hi TD6,

Any chance of sending me the part number and a supplier as well. I'd be interested in following through on it.

Thanks