Pulling diesel injectors

it varies masaively, most "should" just pull out by hand, but if they have been leaking or were installed dry then they can be well seized in.

with commonrail engines they self bleed so just a bit of cranking will sort it.

It can be anything from a doddle to a scrap head and there's no way to know until you try. I've got a photo somewhere of me with a slide hammer hanging off a roof beam, onto a F9Q injector stuck in a head, with a complete F9Q engine chained onto that and hammering the curse word out of it and it still wouldn't come out.

Do they need lubing ? Read somewhere about silicone based grease used on some or something ?


Also the seat cutter , is that just used for a few turns to get a decent flat surface for the seal ? 

Yeah seat cutter just needs a quick dab, I don't tend to do them unless you can visibly see the seat is a bit curse word as if it's still on the engine it's difficult to get the cuttings out.

As I said just go for it. Make sure you keep the puller square or you'll snap the injector. You can burn them out with a spark eroded if all else fails but by that point you might aswell fit another head as its cheaper.

Tip i heard which might be useful - bit of hose taped to shop vac to go down the hole . 

I will play it by eye i think .

if you havnt stripped bits off for access its better (in my opinion)to let the engine run up to temp before tryin to remove,not had problems with the saabs to be honest, but fq9(as stealthstylz says above)is the nitemare one, but not failed yet with the pichler kit

I take it the above applies for indirect injection cars

Hot engine will definitely help as the carbon stuff will be softer

Edit - just had this job done to replace seals on two injectors .

I spent the day before cleaning the gunk out as best i could slowly with a tiny screw driver , gunk , white spirit etc . Got a mobile mechanic to do it as really could not get a garage that wanted to do it !

If anyone does this job on that family of engines forget what the youtube videos say ! Just remove the clamp nut and wiggle the injector and clamp back and forth and remove as one unit . Remove old seal and cut seat and clean , as well as the base of the injector .

The mechanic use this stuff which is pretty amazing at dissolving carbon , oven cleaner has nowt on it .

www.google.co.uk/search?q=permatex+injector+decarbonizer&rlz=1C1CHBD_en-GBGB732GB732&oq=permatex+inj&aqs=chrome.1.69i57j0.6242j1j7&sourceid=chrome&ie=UTF-8

Took less than 1 1/4 hours and he charged me £80 all in - bloody well chuffed - nice to meet a mechanic who has some enthusiasm and explained it all and where others cut corners !

Happy chap !