Thread: Injectors/Heatplugs

Originally Posted by pjlhat

Hi My 1998 300TDI 130 Crew Cab has clocked up 340ks and is performing well with good economy 10liters per 100ks on most trips and about
9-1/2 when loaded with our Trayon Camper and Canoe. Thats cruising at around 95 - 105 Ks by the speedo though reality it is about 8ks less than that. Should I be looking to service the injectors? so that it will go even better now that the motor is well run in? Is there a varity of Injectors to choose from and price? Starting in this winter is requiring two full reverlotions compared to instant starting in the summer. And it runs a bit fluffy for a couple of minutes, is this failed heat plugs and if so how do I test them.
Hope you can help.
Peter

Pull them out (glow plugs that is), sit the outside of the hex nut on the Negative terminal of the battery and run a hot wire from the positive terminal to the top threaded part and within a few seconds the tip should glow red hot, dont hold it on any longer than it needs, once it is glowing remove hot wire and test all the others. If it don't glow buy some new ones, Regards Frank.

Ummmm, unless you are significantly sub zero you dont need the glowies to start a 300tdi. (If you dont believe then disconnect the little yellow wire and see your starting symptoms wont change).

If it is taking longer to crank in the cold weather it will be your starter battery letting you know its ready for replacement (or poor earth/ starter motor connections)

With respect to the injectors, they are a Bosch item, you can buy them from most Bosch or landy stockists or import from the UK. Not really a serviceble item, and only the intial stage crack pressure can be tested. By the time you pull em out, take them to a dieso specialist for testing and cleaning you may as well have bought some new ones! At 340k Id be looking at getting an order in from the UK of a few bits and bobs including a set of injectors.

it also happens if your injectors are really really shot and are not cracking or patterning correctly.

sloppy valve adjustments and retarded timing also contribute.

but I'd be checking RR's suggestion first.

Hi Roverrescue thanks for those details we are certainly in a below zero winter climate on early frosty mornings. Last winter when I had inadvertantly left the fuse our of the glowplugs (while installing an auxillary battery) the starts were very fluffy.
Do you have a suggested web site for UK and would it be a good place to purchase parts for a timing belt and bearing kit.
Peter

I think it really only NEEDS glowies at some figure like sub 15 celsius... it will start fine without them just as you say a bit 'fluffy'. If your battery is dying the current pulled by the glow circuit probably doesnt help the starter motor!

Lotsa UK suppliers, people have good things to say about Paddocks, Ive had great service from Turners???

Im a bit of a preventative maintanence type... and I do all my own spannering. If i had a tdi with 340k id be ordering at least a head gasket, bearing shells, ancillaries, timing case goodies and a set of 'jectors and give it a birthday? Each to there own!

S