LR to CAV options

Explanation: I was experimenting with a replacement for the expensive spin on fuel filter. The first idea was to have a CAV filter at the back so I need not replace the LR filter in the engine bay. But it was a bit vulnerable, and I had heard of people using the generic assembly mounted in place of the engine bay one. As it turns out, even though it's a bit fiddly during changes (you have to use an old drink bottle like changing the oil filter) , using the CAV filter in the engine bay is a good thing - cheap and easy to obtain. And you can see what's going on fuel wise.

Except...... (and this is generic because theres about 34598634857634^2 different filter types that can fill the hole left by the sedimentor frame)

depending on the filter head/filter combo that you have you might find that the filter you attach onto the sedimenter head is doing next to nothing as its bypassing..

heres the test...

1. there should be 2 rubber seals on top of the filter element, one in the lip of the housing and the other on tube that goes into the filter itself, clean the surfaces of the housing and then smear the rubber components with some rubber grease (or diesel if your eyes are good) install just the filter if it doesnt leave a trace on the filter in both places, you're not filtering.

2. if you have the filter with the O ring internally fitted push just the filter element onto the head and see if it stays there, if it falls off you're not filtering.

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Originally Posted by isuzurover

A combination of the two. You buy a new-type combo filter/separator with a glass bowl, for ~$70 (truckline or QLD diesel spares), then fit the metal bowl from your old sedimenter instead of the glass one. You need a longer bolt.

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do you have any recommended brand/models? Im guessing there are about a million different types and sizes....

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Originally Posted by uninformed

do you have any recommended brand/models? Im guessing there are about a million different types and sizes....

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I believe I have bought CAV in the past (could be delphi though).

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Originally Posted by Brian Hjelm

I had a whole new one of these sitting in the shed waiting to be found a home. so when I got the County-Isuzu I fitted it under the bonnet on the suction side of the lift pump and did not disturb the factory's chassis mounted sedimenter. My Isuzu also has spin-on oil & fuel filters, not cartridges.

A far better fuel filter/separator is the Raycor, which is the best one I ever came across in my truck and mining equipment days. They come in sizes to suit everything from small engine installations such as pumps, bob-cats, etc. to bulk fuel storages for fleets, mines, depots. They used to be sold by Donaldson through their Duralife outlets but I think this is no longer the case. Raycors have a very efficient cyclonic separator section. For your interest, Raycor sold a set-up for bulk fuel fleet users that incorporated a metering section to use your waste oils as fuel. you could store your changed oils and the system would cleanse and meter the waste oil in to your bulk fuel storage at a ratio you could adjust.

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Here of photos of where I fitted it. No choice really. There was nowhere else under the bonnet with sufficient space. If I had needed to go out and buy one I would have bought a Racor but I already had a new CAV on the shelf.

I just did this in my Range Rover, using a complete new unit from someone on eBay. (Wagga Tractors or something like that.)

The reason was because I couldn't find the seals for the original little filter, and certainly can't find the filters just anywhere like you can with the 296.

The new unit had 1/2" UNF threads, so I could use the original fuel lines, and I only needed to make a couple of mounting brackets. I didn't use the glass bowl type as it's petrol and in the engine bay!

I should do a thread on it but just thought I'd mention it now in case it helps someone.

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Originally Posted by Blknight.aus

depending on the filter head/filter combo that you have you might find that the filter you attach onto the sedimenter head is doing next to nothing as its bypassing..

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Good point Dave. I found the same applies for the Ryco version of the Lucas CAV 296 original. The hole (tube) down the center was much bigger on the Ryco so wasn't actually coming in contact with the o-ring so the fuel was just going past rather than through the filter element. I now either use the Lucas or Baldwin HDF296 equivalent and find they are a better fit with the glass bowl type adapters.

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Originally Posted by Brian Hjelm

Here of photos of where I fitted it. No choice really. There was nowhere else under the bonnet with sufficient space. If I had needed to go out and buy one I would have bought a Racor but I already had a new CAV on the shelf.

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Brian, what are the advantages of the Racor? Are the filters for them easy to get? What model would you use?

Way to dig up an old thread, but am just about to buy a new unit for the engine bay an was wondering if anyone knows this one will fit the original LR banjo's? so I don't have to jimmy up rubber hoses etc an can retain factory lines. Seen mentioned earlier that the LR lines are M14, this assembly had M14x1.5 ports instead of 1/2 UNF like most others.

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Does anyone know what thread is on the fuel line union nuts that go into the stock sedimeter bowl on a 1998 110 Defender?