Poorly injector

[Redraptor141]

If you have a ultrasonic cleaner or know someone who does nearby then I’d give cleaning it a go first. The jetting pattern on modern CR diesel injectors are tiny and prone to getting screwed up so be carful cleaning them. But it won’t make it any worse if it costs you nothing/penny’s then give it a bash! Worst happens you have to get a new/recon one anyway.

I’ve got a cheap Chinese ultrasonic cleaner, was something like £40 off eBay and works a treat for carbs and the injectors off my 535d. But my injectors were working and I just gave them a blast while I had them out. Tbf the ultrasonic did a great job, I just used vinegar/water with some baking soda and it worked a treat.

As for while your in there jobs I would get a intake gasket set and do then while your there as they harden up over the years. They are quite cheap anyway.

Change the glow plugs if you think they need doing. But use a tourqe wrench in reverse as if they don’t move after the specified tourqe just leave them be (they have a habit of shearing off) I managed to change 5/6 on the X5.

I would replace the injector seals while your in there but that’s a matter of course with new ones. But if you do clean and refit the old one just get some new ones.

Last inspect all the vacuum tubing under the manifold if it looks anything other than new just replace it while the manifold is off. I always replace mine with black silicon as it’s material properties are way better than the OE rubber hoses.

Your biggest pain will be getting the bloody thing out. It’s a case of roll the dice and pray that they come out easy! I got 5/6 out easy on the e61 and the last one I ended up with the bonnet off and me on standing on the engine squatting a slide hammer for about an hour!

And don’t look on YouTube! Some people have had managed to lift the car by an injector!!!

[Clavurion]

Originally Posted by Redraptor141

Your biggest pain will be getting the bloody thing out. It’s a case of roll the dice and pray that they come out easy! I got 5/6 out easy on the e61 and the last one I ended up with the bonnet off and me on standing on the engine squatting a slide hammer for about an hour!

And don’t look on YouTube! Some people have had managed to lift the car by an injector!!!

Those crazy videos must be from the older models (pre 3/2000) where there is no o-ring on the injector body so the injector can badly corrode on the head. I've encountered a few of these and they needed special tools (pull out bed or pull hammer type tool used by impact hammer) to remove. On the injector models with o-ring on the body I have never had any problems. The easiest way is to loosen the injector clamp nuts a few rounds and run engine until the injector "pops out" and starts to leak by. (Engine properly warmed up before procedure.) Then you can lift the injector out just by hand (after intake manifold and fuel line is removed).

[Wookie_79]

Originally Posted by Clavurion

Those crazy videos must be from the older models (pre 3/2000) where there is no o-ring on the injector body so the injector can badly corrode on the head. I've encountered a few of these and they needed special tools (pull out bed or pull hammer type tool used by impact hammer) to remove. On the injector models with o-ring on the body I have never had any problems. The easiest way is to loosen the injector clamp nuts a few rounds and run engine until the injector "pops out" and starts to leak by. (Engine properly warmed up before procedure.) Then you can lift the injector out just by hand (after intake manifold and fuel line is removed).

That’s a cool way of doing it!
It’s injector on cylinder 2 so need to take the intake manifold off...will clean it and replace The seals On it too.

By the way, any idea when to replace glow plugs, was thinking of doing them at the same time but on the other hand car starts beautifully so perhaps there is no point?!

[Wookie_79]

Originally Posted by Redraptor141

If you have a ultrasonic cleaner or know someone who does nearby then I’d give cleaning it a go first. The jetting pattern on modern CR diesel injectors are tiny and prone to getting screwed up so be carful cleaning them. But it won’t make it any worse if it costs you nothing/penny’s then give it a bash! Worst happens you have to get a new/recon one anyway.

I’ve got a cheap Chinese ultrasonic cleaner, was something like £40 off eBay and works a treat for carbs and the injectors off my 535d. But my injectors were working and I just gave them a blast while I had them out. Tbf the ultrasonic did a great job, I just used vinegar/water with some baking soda and it worked a treat.

As for while your in there jobs I would get a intake gasket set and do then while your there as they harden up over the years. They are quite cheap anyway.

Change the glow plugs if you think they need doing. But use a tourqe wrench in reverse as if they don’t move after the specified tourqe just leave them be (they have a habit of shearing off) I managed to change 5/6 on the X5.

I would replace the injector seals while your in there but that’s a matter of course with new ones. But if you do clean and refit the old one just get some new ones.

Last inspect all the vacuum tubing under the manifold if it looks anything other than new just replace it while the manifold is off. I always replace mine with black silicon as it’s material properties are way better than the OE rubber hoses.

Your biggest pain will be getting the bloody thing out. It’s a case of roll the dice and pray that they come out easy! I got 5/6 out easy on the e61 and the last one I ended up with the bonnet off and me on standing on the engine squatting a slide hammer for about an hour!

And don’t look on YouTube! Some people have had managed to lift the car by an injector!!!

Cool info thanks!
Did you use one of those jewellery ultrasonic cleaners?