Has anyone had a go at reconditioning ye olde diesel injectors?

I think the ones in my 200tdi are 100,000 miles old, if not 150,000. Replacements are about £100 ea (so £400) or I could clean the existing ones and replace the nozzles myself for £70, and then take them for testing for probably another £75. Worth it? All cylinders are firing, but I can tell Ive been dropping power a bit over the last 12months. Not burning oil though so I think the piston rings are still good and no vapour from the oil filler.

Mail me I have a mate who works for a company that do this professionally so I can get this done for cost + VAT – should make the testing cheaper if you go down that route
Its not always that cheap to be clear as i discovered when I need a diesel pump and a second hand engine was still cheaper than a recon one of those

Never done sa s I have this mate etc

Personally I fix things when they break and given the landies age you have no idea what will go first so it might be prudent it might be a waste f time as the rings could go etc

cheers J, will email as soon as I get back from dropping boys at skool.

he will be at work now but i will text him and hopefully have a price for tonight
I will need the exact engine and injector type to get an accurate price

well that went smoother than expected. I bought some s/h injectors off ebay for £50, some new nozzles for £70 and stripped and cleaned and rebuilt.

Just dropped them into the Landy and it’s running with much more oomf, doesnt bog down in 4th at 30mph like it was. Hauled itself up Mt Malvern far slicker than it has for months.

Here are the ones Ive taken out of the Landy. Quite possibly theyve been in there for up to 200,000 miles. Theyre supposed to be replaced at 70k. I cant imagine the cylinder with one fitted without the copper washer has been running particularly well either!

i missed this first time round.

i did mine in the van when i had one injector stuck open.

Transpired that after cleaning the pintel ball was misshaped and would never seal on the seat – thats hwy it was passing.

cleaned them all up(most of them only had 2 out of the 6 nozzles unblocked – leading to poor atomisation of fuel and possible hot spot) and had the damaged one replaced.

like you say a phenomenol difference to the drivability of the vehicle. \

so many folk do not accept that injectors are a service item – bit like thsoe that busy their heads in the sand over timing chains – which are a service item its just that in the uk vehicles are too cheap and rot too fast for us to bother maintaining them properly

fortunately Im happy that since theyve gone in an agricultural head in an agricultural vehicle as long as they squirt they’ll do. I havent had the ones Ive refurbished pressure or pattern tested but since new nozzles pattern should be fine. Testing costs a fair bit.

I identified the faulty injector with a leak off test

i split and cleaned the non faulty ones in the ultrasonic bath replaced the damaged one

and then did a leak off test on them when fitted and got results in acceptable parameters within the detailed workshop manual.

I could have a go at that I guess.

My 80K miles RR started to splutter last week and after a couple of hundred miles (I was away on work when it started) it was really struggling. Felt like fuel starvation. A quick look round the back showed something wasn’t healthy on the left bank of the V8.

[url=https://flic.kr/p/21BtrQS]20171118_103833[/url] by WCA!, on Flickr

The smoke is white and smells of unburnt diesel.

Possible injector issue?

In the LR specialist tomorrow for a ‘health check’ but any advice from STW is welcome

I thought unburnt diesel was black (at least thats what i get on start up due to the 200tdi just chucking a bucket of fuel in the cylinders to get going.)

Black smoke is badly burnt diesel possibly caused by a split air intake hose..

…or at least it was when mine went.

My research into exhaust emission colours has concluded:

Black = bad fuel mix / part burnt fuel
White = unburnt fuel
Blue = Oil being burnt, piston rings?
Steam = Water being burnt, gaskets?

mine was white smoke on start up as i had an injector constantly flowing diesel

you probably had poor atomisation in your stoner.

on the tdv6 – the injector loom is quite prone to breaking not sure if its the same thing on the tdv8

mine was white smoke on start up as i had an injector constantly flowing diesel

That’s what I am hoping for. Hopefully they will be able to tell which one it is rather than having to remove and test all 8.

Epic clouds of white smoke are the tell tale unburned fuel giveaway. Your Range Rover injectors will be different to Stoner’s mechanical type.

The injector loom on the Td5 sits under the rocker cover, it’s supposed to be oil proof, but the seal breaks down and oil migrates along the inside of the cable to the ECU. It wouldn’t surprise me if the same hasn’t happened to your V8. The loom should be replaced as a service item

OP, Now would be a good time to change your fuel filter and to clean out the sediment trap if it’s still fitted with one.

when i tested mine all i did was hook up containers to the leak offs for each injector.

very rudimentary but each injector should leak off/leakback the same amount of diesel over the course of a running test.

in my case i had an injector that wasnt ever shutting off so the ECU kept throwing diesel into the injector head to try and achieve desired pressure

so instead of 20ml(i had from all other injectors) from that injector i had nearly 100ml !!

that test doesnt show everything but its as good a place as any to start when your testing kit consists of bottles and fishtank hose 😀

I thought unburnt diesel was black

It’s black if it’s been hot enough. So if it’s been squirted into a hot cylinder where some of it’s burned, but there wasn’t enough air to burn it all, then it comes out black. So if this happens there’s not enough air – bad turbo or MAF or leaking intercooler pipes.

If it’s squirted into the exhaust stroke then it’ll be hot but not burned. So if an injector is leaking, a little bit will dribble out when it’s not supposed to into the exhaust and smoke, as if you’d dropped oil onto hot metal.

That’s how I understand it anyway.

Quick update on the Range Rover

I finally found a diesel engine testing specialist (PB Asher) that could test the injectors on the RR on site rather than sending them away. They can also supply recon injectors at ~£140 each instead of ~£300.

They also managed to get the rearmost injectors out for testing without having to remove the engine which is what 2 garages told me they would have to do. Still 3-4 hours of labour to do it but less than the normal garages would charge.

All this super saving must make the whole thing really cheap right?

Just over £700 cheap for 8 injector tests and 2 recon injectors fitting. Hope to get the truck back tomorrow.

That is cheap

Doesn’t feel it right before Christmas 🙂

they also blanked off the EGR valve rather than replacing it which saved ~£500 so I guess it is better than is could have been

#incoming# Edukator will be along shortly to rant at you for blanking off that EGR !

Meanwhile a local lad on the a90s land rover dumped all its oil on the floor on the a90 the other day then caught fire …..

either that or he torched it rather than deal with LR warrenty 😀

its been spewing black reek for weeks apparently few of my mates have been behind it at times. sounds like the turbo seals let go entirely 😀

#incoming# Edukator will be along shortly to rant at you for blanking off that EGR !

I suspect the way that things are going it’ll be more than the vocal few objecting to this type of activity – NOx and particulates are really not good and anything that might increase emissions of them is not good.

I suspect the way that things are going it’ll be more than the vocal few objecting to this type of activity – NOx and particulates are really not good and anything that might increase emissions of them is not good.

So it is better to reduce the performance and increase other pollutants by pumping dirty air into your engine than to keep your engine clean and efficient?

I guess it depends how much time you spend stationary with the engine running compared to actually driving. I mainly use the RR for motorway use so I am guessing EGR off is a net gain for the car and the environment.

If you make one measure the target you will almost always skew the results. That is what made diesels ‘good’ and petrol ‘bad’ when they decided a different measure (CO2) should be the target.

Not trying to defend the RR and an environmentally friendly car but better than cost scrapping a working(ish) 10 year old car plus the cost of building and shipping a new car I should imagine.