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#Post#: 101005--------------------------------------------------
Series 3 2.25d Bleeding, Priming and Pump Woes.
By: MIKEYT88 Date: March 10, 2016, 5:11 am
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Hello all, as per other post, coming to end of 3 year rebuild,
(out of necessity not vanity unfortunately), should have been
finished and MOT’d by March 20th ?!! Not a chance.
Since January ive been banging my head against a brick wall, I
know they are hard to bleed and get right and I have read
everything I can find prevuiously posted on websites and what
comes up on google, but im getting know where.
So will take you through :
Warning this is long but better I post everything ive done.
Can Bleed system through filter on bulkhead from lift pump.
Can get fuel into injector pump (cav)
Can bleed from main body
Eventually after lost of engine cranking can get the throttle
body to bleed
Both bleed clear diesel and appear to have no air / bubbles.
No matter of Cranking, hours for days, can I get a single drop
of diesel to injectors.
Have cracked off unions to injectors – Nothing.
Have removed Injector pipes completely – Nothing.
Reluctantly removed pump from engine as assumed something inside
is stuck or seized. Has been standing for 2 years possibly
pretty dry.
Opened up throttle and engine stop freed up cam and replaced
gasket
Nothing – No Difference.
So after weeks of soaking in diesel and ATF, injecting fuel
mixture into body and hand turning it while on bench I think im
getting somewhere.
Spinning it by hand on the bench while full of fuel, the outlet
ports spit out fuel and air a good couple of metres, im assuming
this means its pumping and the pistons and plungers are working
?
Replace pump back on Engine and plumb it in.
Now its proving to be a total B’strd to bleed.
Im hand pumping it by lift pump furiously and also cranking it
on handle (with plugs out) and when you think its bled masses of
air is fising out of main body bleed.
Nothing so far from throttle bleed.
Have cracked off filter union and bleed again to make sure no
air getting there, seems to be fine.
Now my questions is this,
Does it sound like Cav pump is working like it should ?
Where is all this air coming from as never had it this bad
before ?
Has one of my major problems been Air still in the system ?
And if I do get it bled, and still have trouble getting fuel to
injectors any new tips ?
My Uncle insists on using EasyStart…. Id prefer not to, unless
absolutely necessary.
I don’t have the option of being towed or jumpstarted. Just not
an option im afraid.
Im open to the wealth of your experience.
Regards. Mike.
#Post#: 101016--------------------------------------------------
Re: Series 3 2.25d Bleeding, Priming and Pump Woes.
By: NoelC Date: March 11, 2016, 1:35 am
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Someone with far more knowledge about series diesels is bound to
be along, however personally I'd go with your uncle's advice.
I'm not a bus mechanic but have been called to numerous
breakdowns over the years when buses have run out of diesel. My
patience is limited, if they won't bleed up in short order out
comes the easystart. Also, when you've been dragged out of the
pub half cut and driven to a dead bus at 11pm to get it going
it's the only way. For the record a DAF 1160 11.6 litre lump
needs two cans of easystart going simultaneously to rev up.
:smilewide:
#Post#: 101018--------------------------------------------------
Re: Series 3 2.25d Bleeding, Priming and Pump Woes.
By: Hissing Sid Date: March 11, 2016, 7:15 am
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Not wishing to insult your intelligence, you have the stop lever
in the correct position?
#Post#: 101020--------------------------------------------------
Re: Series 3 2.25d Bleeding, Priming and Pump Woes.
By: MIKEYT88 Date: March 11, 2016, 11:18 am
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Thanks noelC and Hissing Sid all advice and comments are
appreciated.
the easy start may be making an introduction next week if I
don't get anywhere fast,
and No problem insulting my intelligence, but yep stop lever is
full down, I think my first problem was that was stuck but is
now freed.
on the bench spinning the pump over emits air and fuel to spurt
from ports, when the stop lever is engaged it stops, so i know
its working as it should.
#Post#: 101021--------------------------------------------------
Re: Series 3 2.25d Bleeding, Priming and Pump Woes.
By: Arjan Date: March 11, 2016, 12:00 pm
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Hmm....
Easy start easily destroys more than you'd like.
Sounds like the pump is not delivering enough pressure /
injectors are stuck.
Undo a pipes and have an injector attached to it - but be very,
very careful as the pressure / risk is high !
#Post#: 101022--------------------------------------------------
Re: Series 3 2.25d Bleeding, Priming and Pump Woes.
By: kev Date: March 11, 2016, 12:39 pm
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Old fashioned, I know, but if it's on wheels, tow it round the
block a couple of times, that's worked for me before.
#Post#: 101025--------------------------------------------------
Re: Series 3 2.25d Bleeding, Priming and Pump Woes.
By: spanner rash Date: March 11, 2016, 3:41 pm
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Once you're sure the low pressure side is bled perhaps it's
worth taking all the injectors out and then re-connecting them
so you can observe what's happening when cranking. ( attach &
tighten them once fuel is spurting from the pipes) Using the
handle is sufficient as it will be easy to turn over now (as
Arjan says, make sure the injectors aren't aiming at you!!) If
you're getting a good spit from the pipes first then once the
injector unions are tightened you should see them spraying if
they're ok.
I once spent days trying to bleed a re-built engine that had
been in it's crate for 20+ years... It took me a long time to
suss out that plungers in the pump were stuck and the injectors
weren't opening either due to very light internal corrosion.
It's enough to make a nun swear, so good luck!!
#Post#: 101033--------------------------------------------------
Re: Series 3 2.25d Bleeding, Priming and Pump Woes.
By: GlenAnderson Date: March 12, 2016, 1:49 pm
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Don't use easy start.
Seriously, don't.
It's for terminally tired engines that won't start without it,
not anything else. If you aren't getting fuel to the injectors,
there's a problem with the lift pump, filters, lines or
injectors that no amount of easy start will fix.
Does the lift pump have a handle on the bottom to allow
hand-priming?
If so, see if it works.
Is the gauze on the bottom of the tank pickup pipe clear? Is the
fuel free of contaminants? I had a dose of diesel bug a couple
of years ago that was choking the tank strainer and bulkhead
filter, and it took a while to get to the bottom of the issue.
#Post#: 101038--------------------------------------------------
Re: Series 3 2.25d Bleeding, Priming and Pump Woes.
By: samc88 Date: March 12, 2016, 6:23 pm
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Is your lift pump giving resistance? if its nit then its not in
the right position against the cam so it wont be pushing fuel
through
#Post#: 101051--------------------------------------------------
Re: Series 3 2.25d Bleeding, Priming and Pump Woes.
By: MIKEYT88 Date: March 14, 2016, 6:42 am
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thanks all that's taken time to post a reply.
as I had stated in my original post, towing it isn't an option,
as in is not an option.
The lift pump works fine, I used it to hand pump and prime the
filter and bleed it, I also used the hand pump to prime the cav
pump main body side before I started to crank it over on the
button or via the handle.
ive already disconnected lines to injectors both slacked off
unions and completely disconnected them, there is no fuel at all
coming from the cav / injector pump outlet unions. But when on
the bench and and spinning it by hand the outlets spat fuel in
great spurts so obviously doing something.
so somehow im getting good flow of fuel through but no pressure
in cav pump as it isn't pushing it out of unions.
filter bleeds well, lift pump works well, as with bleed screws
open and hand pumping the fuel jets out under pressure.
But its isn't getting any fuel to the pipes at all, let alone to
injectors.
All I can think of is theres air still in pump reducing pressure
and possible an air being sucked in somewhere.
I will have to investigate further and report back.
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