The Mitsubishi Pajero Owners Club®

jimmybond · Posted: Fri Oct 17, 2014 8:18 Post subject:

I will have the answer in a year or 2 as im on the bosch seal lol.
but in all fairness mark if we look at my mitsubishi canter that was on 170,000 miles with a bosch seal.
plus all the other things on a bosch seal like transits etc it is strange why they would fail.
now if they were fitted wrong then fine that would make sense.
the guy at diesco who builds pumps everyday was adamant the bosch seal never comes back for replacement.
He said its tough as and runs on any fuel.
I got around 100,000kms out of the zexel.
the guy said thats bloody amazing.
we use to have 2 pajeros, 1 did all the towing etc.
got wrote off so this paj does alot more now.
I install abb robots etc, they wiegh 3 ton so to heavy for van to tow.
I have 2 business and paj does the work for both.
even more now as the canter is gone.

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Mark3 · Posted: Fri Oct 17, 2014 12:46 Post subject:

Im sure a Bosch seal in a Bosch pump will work just fine but Paj pumps aren't Bosch pumps which i would guess is where the problem lies......

I actually had a collection of about 23 incorrect seals i left on customers wheely bin in Grantham some years ago and most of them was the Red single seal Bosch type seal, i only just started collecting wrong seals again just so i can show customers the different types of seal that people fit by mistake, also have a look at the Milner's pump seal kit that's pictured on there webpage?

Even though they was told some years ago there Bosch pump seal kit contained the wrong front seal for a Zexel pump they are still selling it today!

davembp · Posted: Fri Oct 17, 2014 17:26 Post subject:

To my understanding the zexel pump (bosch copy) dose not have the same shape of shaft as the bosch pump so needs a differant seal.

Mark3 · Posted: Fri Oct 17, 2014 17:55 Post subject:

Mark3 · Posted: Fri Oct 17, 2014 18:20 Post subject:

Another pic of some seals i have removed that lasted no more than 2 to 3 years and the correct Zexel seal at bottom of pic

Mark3 · Posted: Fri Oct 17, 2014 18:22 Post subject:

Dam no edit function.... you can clearly see there is no front lip on the two wrong seals to fit into the groove on the shaft Shocked

davembp · Posted: Fri Oct 17, 2014 21:46 Post subject:

Good info there Mark, well done.

jimmybond · Posted: Sat Oct 18, 2014 8:20 Post subject:

The zexel type like in your picture is what I had in mine which is what the guy was referring to.
Unfortunately for me its gonna be another 2 years before I know the answer lol and thats if the truck gets that high kms.

Mark3 · Posted: Sat Oct 18, 2014 9:39 Post subject:

For regular pump diesel it's all I have ever fitted, although they not designed for veg oil they don't seem to mind it too much but don't like bio at all, lasting maybe 2 years.

jimmybond · Posted: Tue Oct 21, 2014 8:13 Post subject:

I noticed on the bosch seal that diesco seals the inner part is more of a smaller hole so it has more rubber on the shaft.
so ie you look in the zexel its centre hole is bigger.
the bosch smaller.
no idea if that helps lol but I just thought to myself thats gotta be better as its really pulled onto your shaft.
god knows.
its sure gonna be a long time to find out which wears better in my case.
I know he said this seal can run on any fuel.
I only used diesel same as at present.

steve757 · Posted: Tue Oct 28, 2014 11:28 Post subject:

Hi all again. well the seal has been replaced and the guy said it seemed in good condition, but had i changed any way. At 1st all seemed well, drove over 200 miles non stop with no issues, however, the next morning it started hunting again, admittedly only slightly and drove smoothly as soon as i pulled away for the rest of the day. This now occurs every time I start from cold, but goes away as soon as I drive. Could there be something else going on here?

Simon_W · ******* Joined: 21 May 2013 Posts: 4881 Location: Watford

Air getting into the fuel system maybe? This could allow the fuel level in the filter to drop overnight or when the engine is going cold. Then once the fuel is drawn up by the pump, it can cope with the air. I'd try putting some clear hose between the filer and pump to see if you can spot air going in. Maybe by-pass the main filter unit and insert a small clear inline filter as a temporary measure. It may just be a matter of working your way through the fuel supply system until you find the leak. It coud be corroded pipes or pickup, for example.

jimmybond · Posted: Tue Oct 28, 2014 18:47 Post subject:

Is this a edc pajero or mechanical fuel pump?

steve757 · Posted: Thu Oct 30, 2014 10:48 Post subject:

Hi, this is an edc pajero, P plate

jimmybond · Posted: Fri Oct 31, 2014 9:22 Post subject:

Ok when cold the up and down when you select r is ok as long as its only a couple of times but ok when hot.
most of them do it.
sometimes its because the egr is disconnected.
some play up bad doing exactly what you get, some dont seem to be affected.
with the idle up and down I use to do the idle reset but now I dont bother, I do put into n for 30 secs same as d for secs and leave at idle then same as p.
if its ok warm I would leave it.
every so often I drop mine back in n and then d to give it 30 seconds of idle in each gear.
that seems to work for me.
I know when mine has gone bad after time I just take the batt leads off.
this makes a huge difference.
If no change then it needs to go on a carman machine to recalibrate the tps (lps) as some people call it.

Why it drops is because something is slightly out so engine speed for idle over shoots, ecu turns pump off as its to fast, then it falls to low, pump comes back on and whacks a huge amount of fuel in to get back to speed, you get a black puff of fuel.
I find its because the alloy housing that holds the tps on is now worn so its postion is not quite right so the idle switches come in in the wrong place.
tps needs turning to correct it against the 2 idle switches if that makes sense.