Jump to content
If you value this forum's future please support us
DC_

2.5 n/a injector pipe leaking please help

Recommended Posts

Happy Sunday everyone, so the Mrs came in today and said, "why don't we go away in Doug (The Landy) on Friday for easter for a night or two"

 

I informed her I discovered a leaking injector pipe where it connects to the fuel pump. (Sad face)

so looking at the pipe, it looks like the previous work was a botch/poor job. The nut onto the fuel pump actually looks bigger than the originals, and it's been put on squint/threaded. 

 

So I have a new genuine injector pipe ready to go on. However, I'm a tad scared to just try whip the other one off. 

 

Anyone have any experience with what to expect or tips on how to do it right? If I can get this leak sorted I'll put up with the leaking rear crankshaft seal for a weekend and take extra oil to head off with her indoors and the dog ?????

Share this post


Link to post
Share on other sites

Just change it DC. Leave the injector nut loose and with someone turning the engine over, tighten the injector nut once diesel is coming out of the loose nut and it is bled. Easy peasy ?

HTH

Mo

  • Like 1

Share this post


Link to post
Share on other sites

As Mo says above but have a good look at the threads on the pump fitting as if they are damaged you will damage the threads on your new pipe and it will still leak..

  • Like 1

Share this post


Link to post
Share on other sites

Yep it's the fact that it's threaded is my main worry ?? so what's the advice if I can't get the other one on properly? ??

Great tip on turning over the engine until diesel comes out for the bleed ??

Share this post


Link to post
Share on other sites

Presumably you cannot drive it at the moment so you have nothing to lose by taking the pipe off and inspecting the fitting threads, if they are damaged you either have to try and restore them with a needle file or you get a new fitting, I would think you need to contact a local fuel injection specialist for that but you should be able to change it without taking the pump off.

First step take the pipe off and have a look.

  • Like 1

Share this post


Link to post
Share on other sites

Ok so managed to get out a little while after work, here's what I'm faced with.......

 

597658c36258772e3dcd5089656a5890.jpg

 

72ef7dc4e99d4ff5f78426a18bb020e4.jpg

 

6ef2fc00cba1a70b49edc273fbe59e1c.jpg

 

hope they come out as clear as the originals, you can see a chip in the start of the thread, I'm very weary about forcing anything. Can't find my teenie weenie wee file set anywhere !., grrrrrrr so....... how would you approach this? 

 

DC

 

 

Share this post


Link to post
Share on other sites

A larger half round file?

Share this post


Link to post
Share on other sites

9'' grinder ? ?

Mo

Share this post


Link to post
Share on other sites

Hehe good one Mo, I tried to sort a thread years ago and made a boo boo of it so I'm a tad apprehensive about doing it again. The rest of the thread looks ok, just the little bit at the front needs filed away? 

Am I making a mountain out of a Mo hill lol? ??

  • Like 1

Share this post


Link to post
Share on other sites

To be honest with you, yes, I think you are a bit :)

If there is a burr, or a filled-in thread, then yes you would need to file it back or pick the pieces out with a sharp, small screw driver, but as it is, I reckon it should go on OK.

Put it on on by hand, gently, and see what happens, if it binds, try again? A good wire brushing can often help with this, as it cleans any corrosion/gunk in the threads out making it much smoother to put on... not sure what access is like there though?

  • Like 1

Share this post


Link to post
Share on other sites

Yeah, what Bowie said, give it a rub with a file and wire brush, squirt of WD40, clean it up stick it together.

Share this post


Link to post
Share on other sites

Righty oh, next bit of free time i get i'll go for it. Ive offered it up and it goes tight straight away so didn't wanna risk going any tighter. I'll give it a good clean and see if there's a difference then try the file. 

 

Thanks guys will will keep you posted

Share this post


Link to post
Share on other sites

The only thing I'd be concerned about DC, is if there is damage to the thread on the side we can't see. If the other pipes thread is as bad as you've said then I'd be expecting to see more damage on that thread.

For that reason I'd be inclined to remove that connector from the pump and give it a good thorough inspection, the added bonus being that you could pop it in the vice to hold it whilst you effect thread repairs.

Make sense ?

Mo

  • Like 1

Share this post


Link to post
Share on other sites

Yes Mo total sense, does that connector come off easy then? Won affect the pump In any way? 

 

Cheers 

Share this post


Link to post
Share on other sites

That, I can't tell you I'm afraid.

It certainly looks like it will unscrew but what's behind it I couldn't tell you.

Perhaps one of our more learned friends can answer that question for us ?

If it were me I'd have a go at removing it very gently bearing in mind the possibility of springs under tension, small ball bearings or very small black bits that will be impossible to find on the drive. On the other hand there may be no more than a dribble of diesel.

HTH

Mo

Edit, I can't find any pictures of a CAV pump with that bit removed.

  • Like 1

Share this post


Link to post
Share on other sites

Would it help to gently try an ordinary nut first.  No pipe to get in the way, easier to see/feel if it starts to cross thread.

  • Like 1

Share this post


Link to post
Share on other sites
Posted (edited)

Ahh yes Paddy, I think I have something that might do that exact job. In amongst the brake pipe kit I have. ?

It'll stop me "Patting my Shants" trying it with the good pipe.

Edited by DC_
Big bloody fingers.....

Share this post


Link to post
Share on other sites

Evening guys, wee update, pipe is now on and leak free hurrar!! Paddy good thinking on the nut first suggestion. Gave it a good clean and put the nut on, tight to start but went on all the way. Took it back off and tried the injector pipe, wouldn't go easily and didn't want to tighten too much. Took it back off and gave it a gentle file down on the edge. Tried the nut again, hmmmmm tight again, put it on with Spanners and it went ok. Seemed to clear the way. So bit the bullet and slowly tightened the pipe up..... left the top section loose as suggested, got her indoors to turn it over to let the diesel push through as I tightened up the top fixing. All done !!  Thanks guys !! 

 

But now a twist...... and another spotted drip.....drip.....drip.

 

tried to post the video but it didn't upload. So.......

68A0E7AF-2299-4EC0-8983-F0D2E8D6273A.jpg

 

The drip is coming from the timing tool section as on this borrowed picture..... gasket?? Easy??

 

DC

 

??

Share this post


Link to post
Share on other sites

Would it be a simple job just to use gasket sealant on this? 

Share this post


Link to post
Share on other sites

Mine isn't the same pump as it is the later Bosch VE, but that looks like where I had a leak on mine. It it is similar, there is an o ring behind that plate. For the bosch there is a modified plate that helps locate the o ring correctly to avoid pinching it.

My details here - check carefully but it looks similar?

 

Share this post


Link to post
Share on other sites

Definitely not ok to use gasket sealer on any part of the injector pump , it will get inside and could wreck it

 

cheers

 

Steve b

  • Like 1

Share this post


Link to post
Share on other sites

Thanks Reb78, had a look and can see the similarities alright. Hmmmm ok cheers Steve b, no gasket sealant then. Thanks for the advice. 

So does this plate simply just come off? Will there be springs ready to pop out and spoil my good mood? 

 

I cant find any part numbers for this plate. ?

Share this post


Link to post
Share on other sites

Don't think there are any surprises under that plate, I believe you remove the plate then screw the centre bolt back in to lock the pump for timing.

My guess would be an o ring as well, should be easy enough to get another o ring but try and get a viton one not buna as it will stand up to diesel better.

Probably be difficult to find part #s for it as they don't usually want people messing with bits of the pump, just sell you a new pump.

  • Like 1

Share this post


Link to post
Share on other sites

Thanks Kev, I'm sure I have a box of o rings somewhere. I'll look for the viton one, but short term for this weekend I hope I can find one. "If it's the o rings". 

Share this post


Link to post
Share on other sites

Glad you resolved your leak DC, shame you managed to make another immediately to replace it ?

Mo

  • Like 1

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now




×