525 TDS fuel lift pump query ?

[Bill R.]

The Incoming cost to diesel specialists not including VAT, fitting and setting of your average Pintle type DN0SD style nozzle is around 8 quid each for Bosch originals.

Be prepaired though, These prices are what the specialists DONT want you to know, and keeps them in Jaguars!--Ive been quoted upwards of 25 quid for a single genuine Bosch nozzle for a tatty old Citroen BX! ( DNOSD 299A)--The cost of that one from a suppliers was just 7 quid!--You can easily get them yourself from somewhere like Merlin Diesel Systems, (on the 'net) BUT you will need to strip one of your existing ones to find the nozzle number--or maybe they can cross reference from the KCAxx.xxx number on the injector body, and unless you have spare shims and an injector tester, you cant set them up..........

--Your diesel specialist may baulk at your 'Electronic' injector, and try and charge more for changing the nozzle in that one--If he does, go elsewere, as hes ripping you off--There is NO difference for the purpose of changing and setting up an electronic 'needle-lift' type injector nozzle to the others,in the KCA type holder--They are otherwise identical and use the SAME nozzles, Its just the upper body that contains a coil and needle lift monitor pin.

Pity you havent got a set of used old injectors, I could do them for you, but they are not the sort of usual spare guys keep hold of as they are generally exchange/rebuildable items...........

If you can wait a week or so, Ill be changing mine, and can tell you the numbers I find inside those,--I need to change the seal on the top of my IP too, Another thing I discovered today, Leaking something horrible! Still no joy with my elec windows though...........

[High Compression II]

Great!--At least we know the nozzle type now without removing the injector-DN0SD300, set at 150 bar

Does the listing include the year of the vehicle or does the whole range use the '300 nozzle?

BTW, where did you find this list?

[Bill R.]

factory service manuals that i have.

Great!--At least we know the nozzle type now without removing the injector-DN0SD300, set at 150 bar

Does the listing include the year of the vehicle or does the whole range use the '300 nozzle?

BTW, where did you find this list?

[Nickhlx]

...will have a set of new nozzles, as I run vegetable oil as fuel where the whole injection system needs to be perfect--even if it was on derv as fuel, I would replace at 100K as these things are subject to wear just like the rest of the engine--Use GENUINE Bosch Nozzles and have the pressures correctly set by a good diesel expert--There are many poor diesel places that will put cheap nozzles in your injectors and dont even set them up properly!.

You MAY have hydraulic tappet noise/cam wear--apparently quite common on older M51's--Take a peek with a torch through the oil filler-cap you may see some wear in the cam lobes--Hope not though.......

Timing chains do wear, but generally rattle not knock, More likely its hydraulic tappet/cam wear

Is it mechanical noise or definately diesel-knock? Is it on one cylinder only or all? Can it be isolated by slakening each injector line while idling?--(Take care, diesel at high pressure can enter skin)

You could try 20% veggy oil/diesel from Asda (cheapest home brand stuff), as this % will quieten combustion knock and reduce emissions to boot and will cause no harm--At least this will prove whether its combustion knock or mechanical noise..............
You mention you have hard starting when hot?--Could be IP/injector wear.




I was very interested to see you comments on "veggy oil" - I was in Tesco and saw some veggy oils at 42p / ltr and (jokingly) said to my son " get me 60 litres of that for the car please" but what are the ins and outs and excise duty implications ? can a proportion of 28 second central heating oil be added before things start going bad ?

Thanks, Nick 1995 525TDS SE Auto