Inline fuel filter on a TD42

[MrWasabi]

Hey fellas,
Was considering throwing an inline fuel filter on my 99 TD42, the type with the water bowl at the bottom, maybe something around the 2 micron size.
Speaking to some "specialist" he mentioned that being a non CRD that i should just replace the factory filter for that unit and not worry about putting it inline.
Had a search around and couldnt get much information on this, but does what this guy said hold any weight?

I understand that the CRD engines are a bit more sensitive to water and dirt in the system, but wouldnt an inline filter be just as good on these old kettles? are there any detrimental effects in having a secondary filter?

[Cuppa]

Macca & I have both used a CAV type filter inline together with the stock filter on our TD42i GU's. He has had his a lot longer than me. As yet I haven't felt any need to change mine. The CAV type filters run at around $7 each & are small, so carrying a supply whilst touring is easy, plus any agricultural machinery dealer will have spares. I think they are around the 2 micron mark. (Delphi 296). They should extend the life of the more expensive stock filter. There are other alternatives, but most if not all restrict you to using more expensive filters which are less common. As well as fitting the filter, I again copied Macca & fitted an inline one way priming bulb (advertised as suitable for diesel - not all are). This make priming if you need to (& you will when the filter is changed) a piece of cake. 100 times easier/better than the short stroke priming pump on top of the stock filter. Two or three squeezes & jobs done.

[MrWasabi]

Hey Cuppa thanks for the reply mate. A quick look at the filter you mentioned and sure enough i couldnt throw a stone without hitting 4-5 places that sell em.

The kit, from what i can see, seems to come with the housing and glass bowl, did you manufacture your own bracket, if so do you have any pictures of where you mounted it that would make seeing the glass bowl easy?
Also in regards to your primer, i am assuming this goes before the Delphi? Where did you pick it up from?

Cheers

[Cuppa]

I used the same mounting as Macca & it works well.......... but it utilises the factory intercooler bracket, so wouldn't be applicable to your vehicle I think.

71744

Seeing the glass bowl requires a little bit of inventiveness, :) but your engine bay is probably a bit less crowded.

Yes primer bulb before the Delphi.

[mudski]

If you go down the CAV setup path I would advise to have a spare bowl on hand. If you break this, you wont be going anywhere. And/ or atleast wrap the filter and bowl in some rubber to protect the bowl. Chances of this happening is probably a million to one but...
I thought of doing the same, but I couldn't see the advantage of having the extra filter in my case. I live in an urban area, fuel is always good, if bought from a reputable place, so no issues of dirty fuel and water contamination.
Each personal scenario is different...

[Cuppa]

Yes I have a spare bowl, although they do seem pretty tough. Just seems like a cheap bit of insurance if getting off the beaten track.

[mudski]

Yeah even over tightening them can cause the bowl to crack.

[Cuppa]

Worth a mention ............. if it is installed as a second/pre filter, together with the factory unit, a broken glass bowl wouldn’t leave you stranded as it would be a simple matter to bypass the it & just use the factory filter again.

[mudski]

Not everyone mechanically minded though. But even making a simply by-pass tap around the cav for such issues... Now we're getting technical.

[jff45]

This has been on my list since I fitted the TD42 but I hadn't taken the time to check the best place to fit it. I would use it as a 1st filter and would prefer it before my Carter lift pump but that means fitting it underneath at the rear and that makes it harder to check the bowl.

I like that fitting in the engine bay but it wouldn't work with my lift pump.

How often do you replace the element?

[Hodge]

I have a full Fuel watch kit sitting there, but real estate under the hood is the issue. Like the catch can it's been sitting in the garage for yonks ...

[Cuppa]

Not everyone mechanically minded though. But even making a simply by-pass tap around the cav for such issues... Now we're getting technical.

Just disconnect two hoses & reconnect them differently. Undoing two hose clamps is as technical as it gets. ;)

[MrWasabi]

I like the location of the filter Cuppa, as you said my engine bay is a lot less crowded and I have the threaded holes to be able to bolt something on there.
Cheers for the pic!
Sounds like carrying a spare bowl is the way, and it wouldn't be much of an issue shuffling some hoses around to bypass it, but the bypass tap sounds even better!

So from what I'm gathering, there's no issues running the filter in line as opposed to a replacement. The stock pump can keep up with pushing fuel through an extra and finer filter?


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[Cuppa]

No problem with the TD42i pump, can’t imagine yours will be any different.

[UncleFrosty]

From what I understand, the IPs on TD42s pull fuel (suction) all the way from the tank (well, mine does anyway). Aftermarket in-line fuel pumps have been suggested somewhere on the forum (fairly cheap option) which will then assist the IP if it does struggle pulling the fuel thru the extra, finer filter.
Also may prevent air ingress into fuel system (thru very-hard-to-find pinholes - from experience) turning it into positive pressure system. Yet to add in-line pump to mine as I eventually replaced enough bits for the problem to go away...

[mudski]

Just disconnect two hoses & reconnect them differently. Undoing two hose clamps is as technical as it gets. ;)

For you and me thats easy. Some people I have come across mate during my time in the parts industry over the last 25 years, really boggles my mind on how they even know how to breathe. Not saying the OP is one of these, but just saying....


I like the location of the filter Cuppa, as you said my engine bay is a lot less crowded and I have the threaded holes to be able to bolt something on there.
Cheers for the pic!
Sounds like carrying a spare bowl is the way, and it wouldn't be much of an issue shuffling some hoses around to bypass it, but the bypass tap sounds even better!

So from what I'm gathering, there's no issues running the filter in line as opposed to a replacement. The stock pump can keep up with pushing fuel through an extra and finer filter?


Sent from my iPhone using Tapatalk

Your stock pump should be fine with two filters. If you are running a larger turbo etc etc and have maxed the old pump out then you may see some starvation issues but I doubt it. When I put the 12mm pump on mine, I was getting this awful ticking noise from the pump. Turns out the pump was starving for fuel so a Carter 4600HP pump went in at the tank and all issues gone.