Mk7 denso injectors

[loot]

Been studying these since my leak off results.

Topping up my knowledge etc, saw this which seems informative
http://m.youtube.com/watch?v=6XJb0ghya0w

Having watched the video it seems that there's not much to go wrong with them
Apart from physically inspecting the internal components for scoring or pitting etc they just get a sonic clean and new nozzle.(plus testing and shim replaced as necessary)

Also saw this.

My van is a 2.4 140ps but i have injectors bb(130)
Can anybody confirm that the info in the above image is correct?

Also haven't found any mention anywhere on generating new injector correction factors when they have been serviced

You can buy a sonic cleaner machine for 300 odd pounds and then of course the various injector tools then spare shim kits and other components.
It isn't that far away from buying a new set of injectors.
Ok you should be a 'specialist' but if even they aren't bothered about correction factors Lol.
Maybe the original correction factor is all that is needed to install the injector new, serviced or otherwise?

(The above doesn't include the injector flow test machine which I'm sure it's worth millions )

[karl]

hence you cant but high flow injectors in a low ps engine as the piston carnt cope

[v8dave]

Loot,

It is only the first letter of the last pair that defines size or flow rate, the final letter is just a revision code.
All -B injectors will be high flow, the BC is just a newer version than the BA.

When the injector gets worn enough, neither the ecu adaption or the ids learns will be able to correct for the leakage rate. Believe me I've been there

Karl,

I have been searching the net and can't find anything to confirm that high and low power engines use different pistons, have you taken one of each apart yet and measured the pistons

[karl]

Loot,

It is only the first letter of the last pair that defines size or flow rate, the final letter is just a revision code.
All -B injectors will be high flow, the BC is just a newer version than the BA.

When the injector gets worn enough, neither the ecu adaption or the ids learns will be able to correct for the leakage rate. Believe me I've been there

Karl,

I have been searching the net and can't find anything to confirm that high and low power engines use different pistons, have you taken one of each apart yet and measured the pistons

i have only a rwd 2.4 engine in pieces at the minute on the bench this is a 100ps engine i wont be able to take measurements till next week as am out painting a machine

i have a 85 piston but looks like this



its me new paper weight

[loot]

Loot,

It is only the first letter of the last pair that defines size or flow rate, the final letter is just a revision code.
All -B injectors will be high flow, the BC is just a newer version than the BA.

When the injector gets worn enough, neither the ecu adaption or the ids learns will be able to correct for the leakage rate. Believe me I've been there

Karl,

I have been searching the net and can't find anything to confirm that high and low power engines use different pistons, have you taken one of each apart yet and measured the pistons

That makes sense Dave, so any in the high flow box will fit.
Same as all other Ford numbers/revisions then

According to the video if an injector is over fueling and all internal components are in good condition then a bigger shim ring will reduce the flow.
Can't quite understand the leak off tho except either the ball and spring are worn or the injector is full of crap which seem like a relatively simple repair

[loot]

That looks like a piece of moon rock

[dieselhead123]

Just pulled a 'Low Flow' one apart, the Nozzles are tiny, but the Nozzle Angle is greater than the Tddi's

Anyone got a spare 'High Flow' one they can strip and give me the Nozzle number?
Be interesting to see how different, if not the same, the Nozzle specs are.

PS. You will most likely wreck the Nozzle Holder though

TIM

[karl]

Just puller a 'Low Flow' one apart, the Nozzles are tiny, but the Nozzle Angle is greater than the Tddi's

Anyone got a spare 'High Flow' one they can strip and give me the Nozzle number?
Be interesting to see how different, if not the same, the Nozzle specs are.

PS. You will most likely wreck the Nozzle Holder though

TIM

i know rumblee still has is HIGH FLOW injector which are f***

[v8dave]

If you watch the video carefully you'll see that there are not actually any seals in the injector, leakage is expected and managed by the control of tolerances on the parts. This is why worn injectors leak excessively, leakage is expected even on new units and is allowed for. New injectors have 8 correction numbers for the 4 pressure correction points which would require a very expensive machine to remeasure on a rebuilt item.

Edit: sent you a pdf telling you similar stuff to video.

[karl]

If you watch the video carefully you'll see that there are not actually any seals in the injector, leakage is expected and managed by the control of tolerances on the parts. This is why worn injectors leak excessively, leakage is expected even on new units and is allowed for. New injectors have 8 correction numbers for the 4 pressure correction points which would require a very expensive machine to remeasure on a rebuilt item.

which is why the machine to test these and give correct correction factors costs thousands of pounds hence why they are so dear even reconditioned are around £120.00 each exchange new are around £180 all plus the vat

[v8dave]

I use equipment that can get to 700 bar at work and it's really quite impressive that the injectors can work at 1600+ bar with so little leakage.

[karl]

I use equipment that can get to 700 bar at work and it's really quite impressive that the injectors can work at 1600+ bar with so little leakage.

iv been keeping an eye out for a scrap denso injector to pull apart i did have some but had to exchange them for recons

[loot]

I've got 4 bb high flow injectors in work that seem to be completely buggered Lol.
I'll strip 1 wknd if i can

[dieselhead123]

I've got 4 bb high flow injectors in work that seem to be completely buggered Lol.
I'll strip 1 wknd if i can

Just grip the Injector body in a vice and unscrew the Nozzle holder, 14mm deep socket, they are VERY tight!

Put your finger on the tip of the Nozzle to hold it in place and slide the Nozzle holder up.
On the Nozzle there will be a code number, something like 'DLLA' three numbers 'P' three numbers.

If the code is in my application list then we can compare these with the 'low flow' ones.

It will be interesting to see what alternative Nozzles could be fitted

TIM

[loot]

Dave cheers for that I've been reading up
As far as denso themselves are concerned, we're on our own
What i would like to learn is for us to be able to do some testing and repairs ourselves, even if we still have to send them off for the flow test etc, not got all the info yet but with the right tools, spares and basic tests etc surely it might be possible to bring them into table range? Only Denso can do correction factors it would seem.

Tim I'll try and get those numbers for you wknd:-)
I have a disk cutter there