Centrifugal oil filter for Isuzu 4B

[rar110]

Someone was telling me about the virtues of centrifuge oil filters.

I know the oil in my 4BD runs pretty black and runs noticeably quieter after an oil change. And the TD5 runs a centrifugal filter.

Is it worth considering a centrifugal filter for the 4BD1, or is the cost of one out of range?

I've looked up a few brands on the net such as Mann & Hummel, Glacier, Spinner II (last two may be M & H), Bhagyashree Accessories India. No idea of price.

[slug_burner]

I thought about using one of a wrecked TD5. I also looked up a bypass filter that uses toilet roll like elements. This was around $200 and was for the canister only, would need to make bracket and buy and plumb lines.

I would say that you will not get any change out of $300.

[Dougal]

The factory dual filter system (one main, one bypass) is good for 16,000km oil changes according to the Isuzu NPR manual I have here.
But yes, a centrifuge would be even better.

[isuzurover]

The Mann+Hummel and Fleetgard bypass oil centrifuges work well. Don't know about other brands, and personally I would be wary of buying anything not made by those two or Donaldson.

Bush65 has a mann+hummel centrifuge instead of the bypass filter on his 4BD1TT. I recall the centrifuge cost around $2k new. So it would be cheaper to adapt the TD5 unit.

[rar110]

Priced a Mann & Hummel from Gold Coast, cleanable rather than cartridge type, at $657 + GST. Might be able to do better if we do a group buy.

[steveG]

I just had a quick read of the Mann Hummel info, and there were 2 things that stood out:
1. Oil pump needs to be able to cope with the extra flow used by the unit.
2. Needs an unrestricted return to the engine above sump level. The smallest unit has 1/2" NPT from the quick read I did.

The comparison graph showed full flow and centrifuge filtering - would be interesting to see where a bypass filter like the Isuzu twin filter setup fits into the graph.

Steve

[rovercare]

Why? a 4BD1 will do a bazillion kays anyway:D

[steveG]

Why? a 4BD1 will do a bazillion kays anyway:D

Why would it be interesting?
'cos its boring at work ATM, and knowing that the twin filter setup I've gone to the hassle of fitting might do TWO bazillion kays makes me feel all warm and fuzzy :p

....although that would require me getting it finished and on the road before I'm too old to drive it....:angel:

Steve

[rar110]

I was thinking the feed would be from the spacer you are making at the top of the filter pipe. The return would be to the diamond shaped plate on the pass side where the turbo oil return is normally fitted. The brochure I have indicates a 1" return.

[isuzurover]

I just had a quick read of the Mann Hummel info, and there were 2 things that stood out:
1. Oil pump needs to be able to cope with the extra flow used by the unit.
2. Needs an unrestricted return to the engine above sump level. The smallest unit has 1/2" NPT from the quick read I did.

The comparison graph showed full flow and centrifuge filtering - would be interesting to see where a bypass filter like the Isuzu twin filter setup fits into the graph.

Steve

The centrifuge does the same job as a bypass filter (only better). If you are fitting one it should be connected in place of the bypass filter. That is what Bush65 did I recall.

[rovercare]

Why would it be interesting?
'cos its boring at work ATM, and knowing that the twin filter setup I've gone to the hassle of fitting might do TWO bazillion kays makes me feel all warm and fuzzy :p

....although that would require me getting it finished and on the road before I'm too old to drive it....:angel:

Steve

Haha, I meant why bother spending all that coin on a centrifugal filter when you could just buy another 4BD1 for that price, my why wasn't directed at you Steve:p

[steveG]

I was thinking the feed would be from the spacer you are making at the top of the filter pipe. The return would be to the diamond shaped plate on the pass side where the turbo oil return is normally fitted. The brochure I have indicates a 1" return.

So you're thinking about doing a twin filter setup, PLUS a centrifuge?
Whats the model number you're looking at?

I'd be concerned about how much oil they need to run them, and whether the oil pump has the excess to supply.

Steve

[rar110]

Bearman swapped his 4BD1 out with less than 500k and he his meticulous with servicing.

[rovercare]

Bearman swapped his 4BD1 out with less than 500k and he his meticulous with servicing.

700k when i spoke with Brian, still running well, just low on compression

[rar110]

It operates at 35 - 90 psi.

[rovercare]

I had 750K on my original motor .

http://www.aulro.com/afvb/isuzu-landy-enthusiasts-section/112604-isuzu-maintenance.html#post1324985

[rovercare]

It operates at 35 - 90 psi.


Pressure has not that much to do with the flow, the pump need to be capable of flowing enough volume at the pressures required, if you open up the restrictions to much, you loose pressure.....i.e. noticeable low oil pressure on a worn motor as the bearings have opened up, allowing more flow, less pressure

So if you stick one on, I'd be inclined to stick on a oil pressure gauge and check for any drop in pressure before and after

[steveG]

Pressure has not that much to do with the flow, the pump need to be capable of flowing enough volume at the pressures required, if you open up the restrictions to much, you loose pressure.....i.e. noticeable low oil pressure on a worn motor as the bearings have opened up, allowing more flow, less pressure

So if you stick one on, I'd be inclined to stick on a oil pressure gauge and check for any drop in pressure before and after

And I'd think it would be even more likely to struggle for flow if running the Isuzu bypass filter AND the centrifuge as they are both going to flow oil.
Low pressure at idle when hot would probably negate any good effects of cleaner oil.

Steve

[rar110]

http://www.aulro.com/afvb/isuzu-landy-enthusiasts-section/112604-isuzu-maintenance.html#post1324985

My memory's going, didn't realise his had done that many ks.

The supply pipe is 3/8". I found a US site where they make a kit using this centrifuge to suit a cummins motor fitted to a dodge pick up.

I suppose cleaner oil and longer ks btw changes were benefits I liked.

[nokando]

To address low oil pressure, use a check valve. This will only supply oil to the centrifuge above the valves pre-set cut off pressure. One such valve has a 25 psi cut off pressure.
When idling, there is no loss of oil to the engine if the pressure drops below 25 psi.

Some brands of centrifuges have these built in as well.

The biggest hassle with running a centrifuge is the 1" inner diameter return hose to the sump and above oil level.

Apart from that, removing particles from the oil is a great thing.

My 2 cents.

Cheers

[rick130]

Priced a Mann & Hummel from Gold Coast, cleanable rather than cartridge type, at $657 + GST. Might be able to do better if we do a group buy.

Pricing hasn't changed much then from when I last enquired about six years ago.