Ok. Don’t laugh ! I decided to replace injector seals on my 136k 04 D2, it’s never been a problem to start but I’ve never been overly happy with the way it runs. I read the nanocom and it appeared to show a fault with no3 cyl. I followed the discovery2.co.uk write up to the letter (but did use Allen key to remove injectors, without issue) and used LR seals and washers. Built it backup and it wouldn’t start at all. Stripped it back down and replaced all seals and washers, again with LR genuine. Now showing a fault on no1 & 2, see attached and listen to engine running in vid. Appreciate your constructive comments. Next step is strip again and get injectors tested by Merlin diesels
sierrafery
Well-Known Member
The washers/seals would not mix up the balance nor trigger fault codes, eventually if the clearances are not set well... those codes are more likely caused by the injector loom, did you replace that too once there and cleaned the red plug ?
Cheers Sierra, loom is oem and appx 5 months old. Plug did have oil in but is clean now and has been for a while. Nanocom shows no faults at all ( although I understand it doesn’t cover fuelling side particularly well). About to spend another £50 on seals and washers so I’ll get another loom (genuine) and see what that does. Must admit was nonplussed how issue moved from no3 to both 1 & 2 !
Bennehboy
Well-Known Member
They can. If fuel is leaking by the washer then the ECU will sense timing differences via the CPS and adjust the balance....
sierrafery
Well-Known Member
Hi Ben, i'll stand corrected if you explain how fuel at 4 bar can leak against around 20 bar compression. AFAIK leaking washer can only let combustion gas into the fuel rail and leaking o-ring lets fuel into oil in the head, i dont see how these can mix up injector balance though i'm always up to learn in this area
Bennehboy
Well-Known Member
I've had washers that have poorly sealed and they _have_ affected balance. There's no way of knowing how long some of these washers may have been sat on a shelf going hard, I always anneal them prior to fitting now.
Even if fuel isn't leaking into the cylinder (and it can do whilst air is being ingested and the cylinder is NOT at 20 bar) do you not think that the combustion gas in the fuel rail might also affect fuelling and balance?
Even if fuel isn't leaking into the cylinder (and it can do whilst air is being ingested and the cylinder is NOT at 20 bar) do you not think that the combustion gas in the fuel rail might also affect fuelling and balance?
sierrafery
Well-Known Member
All i know is that before the copper washers were changed on mine as they caused me starting troubles all the live data was perfect and no fault codes were logged like for the OP.
