By-pass oil filtration systems

Good on you Roachie. I have been lookin real hard also and consider there is merit in the system. What I don't like is the added vulnerability of plumbing going awry out in the back blocks. I certainly don't favour putting a hole in the sump for the return line or running the return lines to the block via a vulnerable brass "T" piece. Other than that I would seriously consider. I would still drop the oil at normal changes with the interest being in maintaining highest oil quality. I'll get canned for that statement but I suppose it's my money eh!! I'd be interested to hear how you go if you decide to proceed. Cheers

I have a friend who had a bypass filter fitted to his troopy with 1HZ engine, swore by it and had it for years.
Worked well although he still changed the oil every 5k and filter every 10k so personally couldn't really see the point as the unit was pretty pricey.
All was fine till the day he was out in the goldfield region of WA, a long way from home in Sydney and one of the hoses let go emptying the sump on the road, by the time he realised and shut it down the motor was stuffed, chucked a rod.
Very expensive recovery and subsequent new motor while on hols, the new donk didn't get a bypass oil filter.
I'd be making sure that low oil pressure alarm was fitted. His troopy had a gauge and the low oil light (sump level) but driving along on rough dirt roads he didn't notice till too late.

Roachie

Does your 4.2 have 2 oil filters the same or 2 different ones. If built before mid 2002 then you should have 2 different ones. One is full flow and one is bypass. If they are 2 the same then they are both full flow.

Check these 2 threads on the Patrol Forum:
Oil Filters for GU
Oil Filters for TD42T

Hi Roachie,

I haven't had a bypass oil system on any of my vehicles, but have certainly looked into it. I reckon they do a great job of removing contaminats from the oil and they certainly extend the useable life of oil (oil generally becomes contaminated before it loses it's lubrication properties).

However, on a 4WD in offroad situations, it adds another potential area to breakdown and do some major damage (as in other posts above). I have also heard of mounting it behind the roo bar wing, but after a mud run, how much mud, gravel and crap do you wash out of that area, I know I get heaps in some circumstances?

Not only that, but the cost of the unit itself and the ongoing filter cartridge costs means that unless you significantly extend your oil change interval then you are behind cost wise. I guesstimate you would need to extend to 15,000kms changes and it would probably take a good 100,000kms before you were in front. But after that you would be saving 2 out of every 3 oil changes less the cartridge costs.

I reckon you need to weigh up the longterm cost savings of bypass filtered oil with its increased offroad vunerability versus the proven 5,000km oil change. Given your penchant for proven reliabiliy (and you certainly cannot knock that), I would be suprised if you went the bypass filter route. But maybe your bank manager ways sees the cost savings ;)

Cheers mate

Captain

I've been using Bypass Filters for well over 30 years and never had a problem. Once you buy one it is just a simple matter of transfering it from vehicle to vehicle when you sell/update, ie: you own them for life.
Over 30+ years I have saved a fortune (and saved the enviroment as a bonus!) On average on my two diesels (One a Patrol, one Isuzu)I have extended oil changes by an average of three times original recomended change interval- and had a number of oil analysis tests done which has confirmed I'm being conservative.
I have never had ANY kind of mechanical failure on ANY vehicle fitted with bypass filters!
I also have them on the fuel- Diesel fuel cannot be filtered too well, and the Frantz filters the fuel outstandingly well- way, way better then the factory filter, though I still have that downstream of the Frantz fuel filter for "safety". (Factory filter then lasts virtually forever). You've got to see the Frantz element (toilet roll) to believe the crap after it's been fitted a while. It also extends the life of pump and injectors dramatically.
Another benefit is that they help cool the oil- in our climate this has to be a big bonus.
It's really no contest.

I have an Oilguard system, but I plumbed the return oil line to the rocker cover - a lot less vulnerable in my opinion

G'day Roachie,
As you'd be aware, I have the Frantz system installed in my '99 TD42T...
Can't add much to that which has already been mentioned, except in relation to the oil feed & return lines...
I used existing access points in the block which had in earlier (GQ) models been used to supply the alternator-mounted vacuum pump...
You will find, just behind & below the alt. mounting bracket, 2 plugs.. One is 1/8" BSP (5mm Inhex), & accesses the pressure gallery (I believe you may have fitted your press. gauge sender unit here), & right beside this is a 3/8" BSP (12mm hex.) plug which accesses the return gallery.. There is another 1/8" BSP inhex plug right above the engine mount.. I believe (but have not confirmed) that this also accesses the pressure gallery... All you need are the appropriate barb fittings, & "Bob's your Uncle"... The fittings supplied by Frantz are NPT, so not suitable in this instance...
I fitted the filter unit to the bracket which holds the vacuum canisters (with an extra support brace), after moving one of the canisters so they're both "behind" the mounting bracket (If you have an aux. battery in this space, then this may not work for you), therefore the 2 hoses (feed & return) enter the block side by side, & not far from the unit... No need to be punching holes in sumps, rocker covers, or anything else...
Hope this is of some assistance...

Regards, Ed. C.

An alternative to spin on by-pass filters is a centrifugul unit which has a lower ongoing cost as it only uses a paper insert to collect the particles that collect in it.

Hi Roachie
I also forgot to mention that I have been looking at Fleetguard filters as I understand there are some which offer combined by-pass with "normal" filtration. Basically two partitions in the one filter?? Hopefully not the size of truck filters though!! Fleet guys at work are looking to run these across our whole fleet in preference to manufacturer specific products so as to better manage stocks of consumable items. Cheers

Hi Roachie

I Used an Frantz 2 stacker on my LN65 Hilux 2L Diesel with synthetic oil for approx 200,000k ,changed FILTER every 5000Km (plus 1.5 Litres topup ,system vol was 6L) and oil every 50,000K no oil testing done.

Was chasing more ponies so transplanted the 2.4 with a 2.8 3L inc G/Box and Tfr.
Sold 2L motor to Diesel Mechanic for a mates 2.2 hilux , he was that impressed with the excellent condition of the Motor he came back and brought the G/Box and Tfr next weekend.

The 3L transplant went for 350,000Km with the same treatment before the Hilux was sold with nearly 700,000Km and 18 yrs.

I now have a 100 series HZJ105R (4.2 Diesel) 40,000km (now done 110,000km) at purchase and installed an AMSOIL Dual BYPASS system after making an adaptor to take the oil from the original spin-on (system replaces the original spin-on which is a incidentially a combination of full flow / BYPASS (the toyota BYPASS portion FILTERs the full sump approx every 3hrs and has a lower total particulate holding and retention >10 micron capacity).

The Amsoil Bypass filters to <1uM and filters the whole sump approx every 10 min from memory so no contest.

costs work out about 1/2 (filters and oil testing not cheap ,change filters and oil every 30,000 km,) saves the enviroment (<1/6 oil usage) and provives superior engine protection.

Further the Introduction of Ultra low sulphur diesel helps extend drain intervals further by "Quote" BP website

• reduced corrosion due to acidic exhaust gas components leading to improved maintenance and operation

ie the TBN (Total Base Number) ability to neutralise the corrosive byproducts is improved

• reduced soot build up in the engine lubricants with potential for extended drain periods

Explains its self

I have installed the Amsoil Dual bypass (1 full flow and 1 bypass element) system by removing the original filter and puting in its place a home made adaptor to take and return the oil to the motor using braided hydraulic fittings, no holes in sumps etc.

If you want pics drop a line.

Also have an Amsoil dealer up here (Qld) I can put in touch with.

My better half's parents live USA and I visit occasionally, so brought the system and filters back with me, those spin on canisters realy get US airport security all excited.

Also have 113 L Drum of Amsoil SAE 15W-40 Synthetic Heavy Duty Diesel and Marine Motor Oil ,which at my current rate of use will take quite a time to get through, works out approx $8-90 L ,top stuff but need to organise a buyers group to make the 113 L drums not so hard on the hip pocket.

Cheers

Harrow

I assume that you are looking for an extended engine life by fitting a by-pass filter system. In my opinion the life of your engine will be governed by the number of hours of hot running compared to the number of cold start ups. The trucking and taxi industries get high km`s because of the hot running they do. Taxis, to my knowlege don`t use by pass filters , but trucks do at times. I feel that if you don`t do regular long trips, but instead do a lot of short to medium trips, you will be wasting your money fitting a by pass filter system as you will negate any benefits that the by pass system `MAY` offer.
I assume you have read posts 15993 and 16027. Also see Frantz`s site www.wefilterit.com. The Faq`s refer to toilet paper being used as the filter cartridge by Frantz. Check that Amsoil are not using the same in their spin on cartridges. At the end of the day it is your money, spend as you wish. They will not get mine. Regards G.T.

I assume that you want to get an extended engine life by fitting a by pass filter system. In my opinion the life of your engine will be governed by tke number of hours of hot running compared to the number of cold starts and short to medium trips done.Taxis and trucks get high engine life because of the hot running they do, taxis , to my knowledge, do not use any sort of by pass filter system. Any advantage that you `MAY` gain would , in my opinion be negated by the cold start, stop start running that most of us all do at times.
See posts 15993 and 16027. Also visit Frantz`s site www.wefilterit.com . In the FAQ`s Frantz refer to toilet paper being the filter cartridge . Check to see that Amsoil are not using the same in their spin on filters.
At the end of the day it is your money, they are not getting mine. Regards G.T.

Sorry for the double reply . Regards G.T.