Thread: 4BD1T - set for oil drain etc

Originally Posted by 1103.9TDI

Thanks Dave, but I thought the Donaldson filters were overkill...capacity wise, they certainly look it, compared to most other filters of similar sized 4x4 diesels.

not overkill at all if you take them right up to the service interval that they were ment to be changed at.

the main problem is overservicing and the rubber seal on the filter collapsing and going unnoticed allowing dust in that way or not being installed correctly on replacement.


Ive tapped about a kilo of red bull dust out of a brand new filter on an FFR after a single trip when I was up at 1 armd regt and on ex over in the top of WA but then that rover ran non stop for 36 hours on that trip and we were parked as a command + control post for a lot of that.. She killed the startermotor so was left running at high idle to keep the radio batteries up and more importantly my coke fridge cold...

Dave, do you guy's put any rubber grease or similar to preserve the seals?, or just replace the whole thing....I guess they are getting on a bit, 20 odd years is a fair while even for a Rover....definately for rubber seals.....shows the stamina of the engine, operating in those sort of conditions, lucky the filter housings are so deep......

the rubber seal is a soft rubber seal and its not ment to be greased on insertion its soft like a damp sponge is soft.

the seal should last the life of the filter... which convenintly if the seal is damaged the filter is at the end of its life......

the filter is allowed 5 reverse flow compressed air blow outs and then must be replaced... so far as I can find in the writings you can tap it out as many times as you like. In theory this means you only need a new air filter every 5 years.

Originally Posted by Blknight.aus

i think that boost is topped to a paltry 7psi... by my guestimations the whole setup should deal with up to 14-15psi without too much hassle but then you need to line up intercooling of some sort.

My 4BD1T has been running at least 15psi with no intercooler for ever. Intake temps push 150 deg C at 15psi.

I don't know exactly what caused it, but the wastegate actuator on the original IHI was set to open at 25psi (courtesy of a bike pump and pressure gauge, could only deliver 19psi on the engine). It was like that for the 150,000km it was in the rangie before I got it and for however long it was in a japanese truck before that. I cut the wastegate rod and put an adjustable threaded part in, it went best at 15psi so that's where I left it.

At 15psi at the rev limit the EGT's reach 650 deg C. Intercooler is planned.

not bad for a guestimation then...

This may seem like a silly Q, but why don't you just get the correct turbo associated parts that Isuzu designed for the engines to run the turbo?
I mean if it's money your worried about, just think of the horrendice bill youll have to fit if one of the bogied up parts fails and your beloved engine seizes.

I have a list of Isuzu part No's from when I converted my engine if you want. Just take them in they punch the no. in and order the part. Bolts straight up and you can rest at night knowing that it's done properly.

Just my two cents though.

PM me if your interested

when your suzi siezes you rebuild it.....

the engines designed to be rebuilt... It practically dares you to abuse it because it knows that it was made to go the distance... long after the roaches have croaked and the rovers turned to so much aluminium oxide it will still sit there waiting only for a battery to turn it over and it WILL start and go again.....

All engines are disigned to be rebuilt. But a replacement crank and piston sets arn't cheap.