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Author Topic: Leaking injector pump 2.5tdi 6cyl diesel  (Read 2299 times)

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minilandrover

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Leaking injector pump 2.5tdi 6cyl diesel
« on: 16 June 2011, 23:23:50 »

Help,  today i discovered the injector pump is leaking fuel. :-/ i removed the top engine cover inlet manifold and the top hose drained off coolant cleaned the pump and started the engine again to source the leak. It seems to leak all around the gasket under the top part of the injector pump and towards the front where there is a 10mm hole in the casing (just to the rear of the in fuel pipe) and this hole fills up with fuel too. im thinking an internal seal has failed but can i fix this myself? im a good mechanic but never touched a injector fuel pump. Also the car has been harder to start when hot >:( ( fine cold)  :)and im told this is a pump sensor problem, are the two linked? has leaking fuel internally to the pump got into the sensor and upset it? im desperate to fix this quickly as we are going on holiday in a few weeks!!! (or we were...) Colin :'(
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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #1 on: 16 June 2011, 23:28:04 »

What's the age of the car? I fear that you're talking about the newer 2.5DTi engine that us Brits never got :'( :'(

Or is it the BMW 2.5TD?
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hoofing it

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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #2 on: 17 June 2011, 06:39:21 »

The link below shows the top of the fuel pump your talking about.
If you pm me your E-mail I can send some better photos if I can find them.
the best picture is the second one.
http://www.omegaowners.com/forum/YaBB.pl?num=1284826092
This is from the 2.5td and not the 2.5DTI.
The best way to get at the top of the pump is to remove the inlet.
There is a fair amount off slacknes once you get the 3 bolts out the fourth one is a security bolt I removed it by tapping a 6mm socket onto it to help remove it.
Your best option to use blue hylomar (instant gasket) then put the top plate back on and leave overnight to set.
« Last Edit: 17 June 2011, 06:40:02 by hoof »
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minilandrover

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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #3 on: 17 June 2011, 12:54:57 »

Boy you guys are good, [smiley=thumbsup.gif] posted last nite and got up to a reply this morning, Yes it's the bmw engine version 1994 and was going fine too. OK so the pump body is supposed to be full of diesel then. I assume this is correct as it says in the link that to flush out with clean diesel afterward's. So it's no more than a naff gasket then, i hope. Weird how things happen as my kawasaki police bike had its fuel tap inner gasket fail last week too. Both PI**ing out fuel everywhere. But that's ok when you understand the problem and then can proceed with the remedy. Thankyou for your super quick reply. [smiley=dankk2.gif] Colin.
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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #4 on: 17 June 2011, 16:57:32 »

Quote
Boy you guys are good, [smiley=thumbsup.gif] posted last nite and got up to a reply this morning, Yes it's the bmw engine version 1994 and was going fine too. OK so the pump body is supposed to be full of diesel then. I assume this is correct as it says in the link that to flush out with clean diesel afterward's. So it's no more than a naff gasket then, i hope. Weird how things happen as my kawasaki police bike had its fuel tap inner gasket fail last week too. Both PI**ing out fuel everywhere. But that's ok when you understand the problem and then can proceed with the remedy. Thankyou for your super quick reply. [smiley=dankk2.gif] Colin.
yes the whole body is filled with diesel.
Getting a new gasket could be dificult unless you know anyone who is bosch certified repairer(been there done that) thats why I used instant gasket as this part of the pump isn't preasurised.
Also when you lift off the pump body there is a arm that locates into the base of the pump (ball and socket set up)  this will move when you pull the top off and it can be a pain to get back on  :y
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minilandrover

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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #5 on: 17 June 2011, 17:42:04 »

OK thanks for that i have bought new instant gasket, new spline drives, to remove something that had splines on, and a new 12mm spanner so i can replace the inlet manifold and get to the rear nut's more easily, I did see a spanner set with ring ratchets that also has pivoting ends very nice and just the job for the rear most nut but at forty euros for four i found that a bit steep ( or am i just tight?) so i bought one i can modify specially for the job. Why can't car designers put an engine in a car so that a mechanic can do most jobs without having to hire a three year old child to squeeze between the gaps. And the number of bits that stick out with razor sharp edges is beyond belief. Im actually thinking of using an angle grinder to remove the front of the windshield wiper motor support so i can get my hand and ratchet in behind the engine. Any way thanks for all the good info im off to my garage. have posted another thread on de catting the car. cheers  colin :D   
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Omegatoy

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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #6 on: 17 June 2011, 19:17:37 »

Quote
OK thanks for that i have bought new instant gasket, new spline drives, to remove something that had splines on, and a new 12mm spanner so i can replace the inlet manifold and get to the rear nut's more easily, I did see a spanner set with ring ratchets that also has pivoting ends very nice and just the job for the rear most nut but at forty euros for four i found that a bit steep ( or am i just tight?) so i bought one i can modify specially for the job. Why can't car designers put an engine in a car so that a mechanic can do most jobs without having to hire a three year old child to squeeze between the gaps. And the number of bits that stick out with razor sharp edges is beyond belief. Im actually thinking of using an angle grinder to remove the front of the windshield wiper motor support so i can get my hand and ratchet in behind the engine. Any way thanks for all the good info im off to my garage. have posted another thread on de catting the car. cheers  colin :D   


lol its actually easy when you have the correct tools!!! all you need is a 3/8drive rachet and i personally use short wobble bar extension and a 6 inch wobble bar extension for the inlet manifold, it can be off inside 20 mins!! as to decatting cant see needing remap as it will not affect the fueling just allow the turbo to spool up faster, although its called a cat its actually a very very basic one which is more of a burner rather than a true cat :y

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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #7 on: 19 June 2011, 21:08:01 »

Back again, [smiley=vrolijk_26.gif] i've removed the top of the pump now, I had to dremmel a slot into the three sided security bolt and use a shock hammer to release the bolt. [smiley=happy.gif] and have removed the ribbed seal and cleaned it all out to replace with blue gasket compound along with the ribbed gasket. I have noticed that the top pump section has elongated slots so in fact the top half can be slid forward or backward. What does this change? the tick over speed or the max debit output? Where would you recommend i locate the top half? the probable answer is going to be...exactly where it came from [smiley=lolk.gif]...but just wondering... [smiley=huh.gif]
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Omegatoy

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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #8 on: 19 June 2011, 21:48:37 »

not one hundred percent on this but i believe I have read somewhere it sets the tickover speed, but if course with an electronic throttle it may reset itself!!!

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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #9 on: 20 June 2011, 08:39:34 »

Ive never tried it but its safer to put it back where it was as there could be a chance if you moved it to far forward the engine may over speed and not have time to save itself from self destruction :-/ :y
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minilandrover

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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #10 on: 20 June 2011, 12:30:20 »

Still having problems :(, ive re-fitted the covers to the pump first filling the gasket channel with gasket bleu then inserting the gasket ( intact) then spreading the blue around outside the gasket, screwed it down , not too tight left it for 14 hours then tightened it down hard. bled the right hand pipe and tried a start. but it refuses to fire and guess what, still dripping diesel from around the joint :'(   BAHH  :-/ so i guess i will have to order another gasket but cannot find a supplier, any ideas? I presume it didn't want to start as it has got air in the system, what is the correct procedure after dismantling?  :-? colin
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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #11 on: 20 June 2011, 17:10:11 »

Quote
Still having problems :(, ive re-fitted the covers to the pump first filling the gasket channel with gasket bleu then inserting the gasket ( intact) then spreading the blue around outside the gasket, screwed it down , not too tight left it for 14 hours then tightened it down hard. bled the right hand pipe and tried a start. but it refuses to fire and guess what, still dripping diesel from around the joint :'(   BAHH  :-/ so i guess i will have to order another gasket but cannot find a supplier, any ideas? I presume it didn't want to start as it has got air in the system, what is the correct procedure after dismantling?  :-? colin
Sorry to here it's not worked  :-[ the only other way I can think of is to make a gasket but I don't think it would work either.
Getting parts for pump is very dificult unless you know a bosch approved repairer as said in a previous post I spent nearly a day trying to source parts for my pump when it failed but I couldn't buy any because I wasn't bosch approved ( Big funny hand shake members only lol).
As for bleeding take the bleed bolt out and fill the pump with fuel using a syringe+tube (bleed bolt is on the side between the pump and the block). re-fit the bleed bolt then crack all the injector pipes at the injectors and turn over until fuel comes through .This may take a fair bit out of the battery.
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minilandrover

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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #12 on: 24 June 2011, 19:31:20 »

Hello again, SORTED... i bought new gaskets for 3.60 each gasket, only 2 required, refitted everything, opened up the return pipe and turned on the ign a few times till the pump housing was full. tightened up the pipe and after a few try' s at starting she bumbled int life.  Then i replaced the Cat with a new pipe i had prerared catless, and took her for a spin, literally, i can now drift round roundabouts on full opposite lock. amazing the power gain, no smoke, just poke. :y..
faster turbo pick up, more power, and just a slightly more audible exhaust tone... boy am i happy, and that lot just cost me 8 euros and 1 hours welding...
thanks for the info on the pump.. cheers :D
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Omegatoy

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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #13 on: 24 June 2011, 19:34:18 »

Quote
Hello again, SORTED... i bought new gaskets for 3.60 each gasket, only 2 required, refitted everything, opened up the return pipe and turned on the ign a few times till the pump housing was full. tightened up the pipe and after a few try' s at starting she bumbled int life.  Then i replaced the Cat with a new pipe i had prerared catless, and took her for a spin, literally, i can now drift round roundabouts on full opposite lock. amazing the power gain, no smoke, just poke. :y..
faster turbo pick up, more power, and just a slightly more audible exhaust tone... boy am i happy, and that lot just cost me 8 euros and 1 hours welding...
thanks for the info on the pump.. cheers :D

well done for sorting the pump!!!
where did you soruce the gaskets and did the cat removal really make that much difference? might have to do  it when the mrs is away!! :y

minilandrover

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Re: Leaking injector pump 2.5tdi 6cyl diesel
« Reply #14 on: 25 June 2011, 00:23:57 »

Hello again, Yes the power difference is amazing. i must have at least another 40bhp! and so responsive, it's like i had been towing another car for the last year, and the tow rope has just broken... :D i took it for a run up our local dual carriageway and when i came off at the double roundabouts under the main road i was able to drift the car, 2nd gear blazing away tires squealing and nearly full opposite lock.. it never did that before!!! :o. so i guess it is running just as well as it can. i don't think re chipping could do that. the gaskets came from a company called ouest injection, there in Nantes, chateaubriant and a few other towns. the seals are just case gaskets that fit into a groove, ribbed to stop them falling out when you turn over the cover to bolt it on. I could not get the three sided bolt undone (tried a socket ) so i used my dremmel and a one of those brown disks and cut a nice slot 2.5mm deep across the middle of the bolt head. Then i used a shock screwdriver ( the ones you hit with a hammer ) to crack the bolt loose. did it up tight by hand afterward. The new seals were sitting proud of the seal groove where as the old ones were squashed flush. If you cannot get them in England then send me an email and i will get them for you. The cat came out easily. I had a spare exhaust (spare complete car but sold off most of it now) and cut the stainless steel cat can either side of the last rib on the top side of the can, then along one side just above the lip at the side. then opened it like a lid. the catalyser sits in a wire mesh wrap that protects it from damage when the exhaust hits road bumps etc, it can be levered out gently and kept intact for selling to a re-cycling dealer, they are worth 50 quid!!! once removed the can is closed down and welded around the cut. grind any bad weld and re weld so that there is  no gas escaping when you re fit the exhaust. Use a mig if you have one as the stainless steel is fairly thin, or use thin 2mm rods in an arc welder. The leaking diesel has actually soaked the rear bolts of the front exhaust section,and they came out easily. the front nuts with the springs were a bit stiffer but came off ok. unbelievably they were nylock nuts, on an exhaust!!!  [smiley=lolk.gif] anyway they went back on and i will keep an eye on them as they just compress against the spring, do not over tighten, the spring should be compressed but not to the maximum. Fitting a second lock nut would be better than nylock nuts. When i started the engine after bleeding the pump, i took the car outside and gave it a big rev and shot off down my driveway with a massive cloud of crap from both the exhaust and the driveway (dirt) i could hardly see behind. the engine blew all the soot out that the cat had been responsible for accumulating in the silencers. once blown clean no more smoke. the exhaust note is only slightly louder but clearer no longer a mmeuhh   more a grrrrrrrr ;D have a look on my photobucket albums, i will post one called cat removal on "minilandrover" so send the missus off to the shops and get the car up on the ramps. :y i will do a fuel test (driving normally and post the results) i was getting up to 38 mpg recently so it will be interesting to see if it gets any better. the worst i got from the car was 30mpg when towing and driving hard and around town a lot.
keep you all posted on this thread. let's have your comments... :y
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