Split Injector Pipes

To keep it simple... I've had three split injector pipes on three
consecutive days this week! Ideas anyone?? Apart from gremlins with a
hacksaw, I (nor anyone else) can think of any good reason for it.

TIA

 

Update on this... had a new set of four pipes from Peugeot fitted on
Thursday that only lasted 140 miles then one sheared off again - back
to the garage in Aberdeen that fitted the full set, and he replaced the
sheared one. The mechanic was not letting me go until he found out what
the problem was though... and we thought he did find it - there was a
bolt missing from the underside of the pump which he duly replaced, and
I set off confindent that it was finally sorted - Travelled the 70
miles home and another one has sheared off about a mile from my
house!!! That was two fractured pipes in the space of two hours... no
one has a clue what to do with it now...

 

How exactly are they shearing off?
Are the unions actually comming out off the fitting itself.
Are the pipes shearing off at the unions, or are they coming out of the end
fitting themselves.
A picture would help.
If the pipes are physically breaking I would suspect a vibration issue. If
the connecting unions are coming out of their fitting (stripping the thread)
maybe they are the wrong unions (wrong thread or material). If the pipes are
bursting or facturing it may be a problem with the pressure in the system
( though I did not think that it was possible to get enough pressure up to
do this). Or alternatively if the pipes are stretching their flare and
pullling out of the union you might be fitting the wrong type of pipe into
the system (too soft a material).

You should be able to get your injector pump tested by a specialist and get
the correct pressure set. If this bolt that was missing of the pump, was it
to do with the pressure regulation? Or is it a red herring?

Is this a HDI engine?

Regards
G.

 

Hi,

Obviously not an HDi, there are no injector pipes on them.

BTW, are we talking about injector pipes or return pipes which are fit from
injector to injector ?

Regards,
G.T
205 Diesel & turbo-Diesel : www.205d.com

 

I assume the missing bolt is the rear mounting bolt, and this is quite
a coomon fault and the main reason why the pipes break. Make sure all
the pipes to the pump are slackened off, then tighten all the mounting
bolts (three at the front and the rear one) then tighten the pipes to
the pump. This is what you should do when the pump timing is adjusted.
Slacken the pipes, adjust the pump, tighten the mounting bolts, then
tighten the pipes. Otherwisw there is undue pressure on the pipes and
they shear.

 

They were shearing off just behind the union at the pump end. After my
last post, we found what it most likely to be the problem. The bolt the
guy had fitted in Aberdeen, which was nigh on impossible to get into
(directly underneath the pump) had worked its way loose and was lying
in the bottom of the engine bay. I'm not sure what exactly the bolt was
for, but by the looks of it (he fitted a 10 x 30) it was just a
securing bolt for the actual pump unit itself. But how anyone is
supposed to access is properly, I have no idea, as it's in a nightmare
position...

Will let you know...

 

You have to have the correct bolt which is a shouldered tapered type.
Get it from your dealer. It is difficult to fit but not impossible.

 

Thanks for all your help guys - I've now replace the four injector
pipes again, along with a new set of four bolts for the pump from
Peugeot, which included the different one for the back of the pump -
Have driven 350 miles, and no problems whatsoever.

 

For further information. If in the future you need to adjust the pump
timing, ALWAYS loosen the pipes before you move the pump. This will
lessen the strain on the pipes and prevent them from breaking.