bypass oil filters

Waz did you check out the URL's I posted in message 3099

Waz *seriously* over kill.
Waz normally 40,000k's or 18 months for a diesel filter. The amount of crook fuel you get these days and few and far between. If you fill up at outlets that have high volume sales, or the major oil company or +Petrol outlets, the chances of getting dirty or contaminated fuel are close to nil. Draining a bit out the bottom every three to six months depending on your use will give you an excellent indication of any dirt or water. I do always carry a spare diesel filter in the vehicle just in case I get a crook load of fuel. Oil filters I change on mineral oil every second oil change, but that would be at a 16,000k's. With you doing it at 5,000k's that would make it every third change. There is a substantial amount of filtering capacity in those filters. Have a look at a filter similiar to your vehicle here:
http://www.ryco.co.nz/downloads/
The Z334 is probably the one you use or close to.

I will do up an article tomorrow or in the next day or two, work permitting about fitting a bypass filter.

Thanks Oziexplorer, i too am interested in fitting a bypass filter.

Ozi
Am also looking forward to your article on fitting a bypass oil filter - in my case it is also to a 1HZ (1998).

Oil is not cheap and is a finite resource as we are finding out with water presently in Australia. What is more, filling dumps with oil filters and unecessarily recycling oil (unfortunatly lots does not) is not a smart environmental move. However, in this case, you can win substantially financially and the environment can win. You would not find one of the trucking or earthmoving companies that have switched to synthetic lubricants and improved oil filtration (if necessary) would ever consider going back to their old expensive lubrication regimes. Basically using synthetics with a bypass lube oil filter can double the engine life between rebuilds, and often the crankshafts do not need to be touched.

John who mentioned contaminated oil or clogging the oil system?

Technically oil never breaks down, the additives/detergents in the oil do.

A bypass filter removes all the particles between 2 micron and the normal average for the full flow filter 10 micron. The wear factor reduction from removing those particles is dramatic. I don't think those manufacturers which fit bypass oil filters do so for fun. Unfortunatly lubrication technology knowledge and application is in the dark ages in Australia.

As the hoses fitted to a bypass oil filter are a minumum rating of 400psi, the chances of one of these hydraulic hoses failing is slim compared to all the other failures you will get long before an oil line failure.

Chris do your research on those links provided first. Unfortunatly, lubrication knowledge and technology is back in the dark ages in Australia.

With synthetic in the drive train, you could change it being generous at 250,000k's. If you did an oil test at 250,000k you would find you probably could go to 400,000k's. Personally, I would probably change the diffs at 100,000k's, only because it is not worth getting an oil test for the couple of litres it takes.

Changing engine oil at 5K in this day and age is nothing but a total waste of money. Why do you think you need to change the oil at 5K?
If you phone Ryco on their toll free phone number, they will tell you how ludicrous it is to change the filter at 5K. If you had to change the filter at 5K you would have no engine left after 50K

John, If by pass filters clog up as you claim, what does that tell you? The idea is you work out when it is an ideal time to change them and then you have the perfect condition for the engine.. My thoughts only regards Michael

John what you are saying flies completely against what the vehicle and engine manufacturers are doing. Take for example the Mercedes Vito, recommended service intervals are between 20,000k's and 32/35,000k's because of improved filtration and bypass filters fitted as standard. You have to ask why do companies like Cummins, Komatsu and others fit bypass filters as standard equipment as well as other major companies. Bypass oil filters have been used on trucks and earthmoving equipment for years, more than I care to remember. Why do you think they fit them. It is to remove the small damaging particles between 2micron and up to 20 micron in some cases which account for 60% of engine wear. The dual stage filters as fitted to many if not all of the 4WD type diesel engines only go down to 10micron at best. Those particles just love grinding your engine away - slowly, but surely.

Because of pollution measures and the Exhaust Gas Recirculation (EGR) which actually increases build up in the oil of particles/soot. This soot has to be removed, and your full flow filter is not going to do that sufficiently. You will shortly see bypass filters fitted as standard to every diesel engine.

John I would hope you do some research on bypass filters and the advantages they have. There is substantial amount of information on the Internet, and in industrial lubrication books.

No, for the first minute you are correct, if you disregard what is left behind by the old oil.