V70 diesel injector removal for overhaul

[Nick]

I am trying to remove the diesel injectors from my 1997 V70.

They seem to be stuck in position and "reasonable" pulling force doesn't
seem to remove them.

They do seem to be able to turn, so I guess they are in O ring seals and
perhaps just need more pulling force.

Are there any tricks to breaking the 10 year old seal (like loosening the
bridge bolt a bit and starting the engine)
or cranking it over without the fuel pump running ( how can this be done ?)

Thanks,

Nick

 

[Tim..]

I am trying to remove the diesel injectors from my 1997 V70.

They seem to be stuck in position and "reasonable" pulling force doesn't
seem to remove them.

They do seem to be able to turn, so I guess they are in O ring seals and
perhaps just need more pulling force.

Are there any tricks to breaking the 10 year old seal (like loosening the
bridge bolt a bit and starting the engine)
or cranking it over without the fuel pump running ( how can this be done
?)

Usually some carbon around the tip, plus dry seals.

You can either ply them with plus-gas or similar at regualr intervals for
24hrs or so, waggling inbetween, and / or running the engine with the clamps
loose (not removed). Seeing as you will be replacing all the fire washers,
seals and tips some damaging blow-by wont hurt for a very short period.

Tim..

 

[Nick]

Usually some carbon around the tip, plus dry seals.

You can either ply them with plus-gas or similar at regualr intervals for
24hrs or so, waggling inbetween, and / or running the engine with the
clamps loose (not removed). Seeing as you will be replacing all the fire
washers, seals and tips some damaging blow-by wont hurt for a very short
period.

Tim..

Hi Tim,

Thanks for that - I'll give that a try when the rain stops !

As I will have to take the injector lines off to remove them, any idea how
to re-prime them quickly,
or is it a case of cranking and cranking till they bleed themselves ? Does
this take long do you know ?
The local diesel overhaul place apparently charge approx £25 to £30 per,
after doing a spray pattern test
to see if an overhaul is needed, which I guess sounds reasonable.

Thanks again

Nick

 

[Tim..]

Hi Tim,

Thanks for that - I'll give that a try when the rain stops !

As I will have to take the injector lines off to remove them, any idea how
to re-prime them quickly,
or is it a case of cranking and cranking till they bleed themselves ?
Does this take long do you know ?
The local diesel overhaul place apparently charge approx £25 to £30 per,
after doing a spray pattern test
to see if an overhaul is needed, which I guess sounds reasonable.

Sounds too cheap to me. Nozzles and seals and pressure set up, plus labour,
plus vat ought to be more in the region of £50 each. Check what they are
offering to do for the £30...

I cap the ends of the injector pipes with little rubber caps, i am sure you
can rig something similar. When refitting, crank the engine over with the
pipes re connected, but slack, tighten acouple, crank some more til it shows
signs of firing, then another 2. Should start on 4 then. Retighten the 5th.
Degrease and wash off, job done.

Tim..

 

[Nick]

Sounds too cheap to me. Nozzles and seals and pressure set up, plus
labour, plus vat ought to be more in the region of £50 each. Check what
they are offering to do for the £30...

I cap the ends of the injector pipes with little rubber caps, i am sure
you can rig something similar. When refitting, crank the engine over with
the pipes re connected, but slack, tighten acouple, crank some more til it
shows signs of firing, then another 2. Should start on 4 then. Retighten
the 5th. Degrease and wash off, job done.

Tim..

Thanks for the reply - Apparently I have to remove the pipes from the pump
to the injectors to get something else off
to allow removal of the last one or two - I guess I can rig something to
fill the pipes, temporarily cap off one end, fit and then
remove cap at last minute, thereby hopefully retaining the pipe full of
diesel.
Re the cost, the guy did say with a gleam in his eye, its the same cost to
you whether you are the main dealer or a private individual
as if he was aware of the mark up by the dealer on his prices and also
thought it a rip off.. This is a injection specialist
who has been around for some 20 years + to my knowledge.... and he said all
parts would be changed for new... perhaps this was the
labour only price and parts would be on top...
As you say it must be worth doing at 165,000 odd miles, as all the rest of
the car is now in good shape and just passed an MOT with no
issues - warning on a front CV joint boot showing signs of perishing....

Thanks,
Nick