[richard_tricky]

hiya. I've got a 2007 335d (uk) and I'm getting a strange ticking noise. wondered if anyone can help me.

this noise has been bugging me for a while now, I've even convinced myself at times it is normal but I don't think it is.
generally it only seems to happen when the engine is warm, most noticeable under slight acceleration and can only be heard from inside the cabin. it's definitely coming from the engine bay somewhere. it also changes with the engine speed.

I've had checked it with Itsa-d and no faults show up and the smooth running specs are are in normal values.
At idle the car is fine, no loss of power.

im thinking an injector?

I'm sure somethings not right as the 335d engine is generally smooth and quiet but this doesn't seem normal.
can anyone Help?

thanks

[Capn Crunch]

Common rail diesels are known for injector noise if they are dirty or worn or possible injector noise from advanced timing. I'm not sure if this is your problem or not. Can you capture a video of the noise?

[richard_tricky]

I'll try and capture a video over the next day or 2.

However it's the only thing you really hear in the cabin on acceleration. Of you have the radio on it drowns it out.

It's like almost like the sound of rear 2 injectors nearest the cabin are coming through the firewall into the cabin. But I've checked all the fittings for the pollen filter and there are no gaps and every thing is in place.

Just wish I could get to try another 335 d near me.


Can anyone else hear a ticking noise on acceleration without the radio on. Inside the cabin, Windows up?

[Capn Crunch]

Ticking is not normal. I just finished a CBU cleaning tonight and you can't even hear diesel clatter on acceleration. After my CBU the idle was barely noticeable.

Does it sound like a tick or a bunch of clattering as you accelerate? Injector timing ticks sounds like a crackle or a quick clattering and is very distinctive and you are unlikely to have timing clatter without a tune or something that advances injector timing. A bad injector has a softer ticking noise and is likely to only sound in a single injector cycle.

[BB_cuda]

There is another thread on this same topic. Guy and his dad had same engine. One ticked and other didn't. Don't remember outcome. It might be over in the European diesel section. One car was 335 and other was a 535D, but this is from memory.

[BB_cuda]

I did a search on ticking in thread titles only within our sub forum. I got two other hits besides your thread.
http://www.e90post.com/forums/showth...hlight=ticking
http://www.e90post.com/forums/showth...hlight=ticking

[richard_tricky]

Originally Posted by Capn Crunch

Ticking is not normal. I just finished a CBU cleaning tonight and you can't even hear diesel clatter on acceleration. After my CBU the idle was barely noticeable.

Does it sound like a tick or a bunch of clattering as you accelerate? Injector timing ticks sounds like a crackle or a quick clattering and is very distinctive and you are unlikely to have timing clatter without a tune or something that advances injector timing. A bad injector has a softer ticking noise and is likely to only sound in a single injector cycle.

It's more of a single softer tick. I'm really thinking I've got an injector on its way.

[richard_tricky]

Originally Posted by BB_cuda

I did a search on ticking in thread titles only within our sub forum. I got two other hits besides your thread.
http://www.e90post.com/forums/showth...hlight=ticking
http://www.e90post.com/forums/showth...hlight=ticking

Thanks for that. My ticking is much softer than that.

Al idle all is perfect.

It's only under load that the noise is apparant

[lnxguy]

Toss a bottle of Diesel Purge in the tank and see if it helps.

[Capn Crunch]

That's where I would start... use the recommended amount of your favorite reputable diesel fuel treatment with injector cleaner. It might take 2 or 3 tanks of fuel to clean your injectors. It may not save it if the injector is too far gone. It could also be a valvetrain noise.

[richard_tricky]

I've got it going to the dealership on Tuesday for them to have a look I have a bmw warranty on it.

I'm guessing fuel treatment is ok to use?

[Capn Crunch]

I have always used power service on my common rail diesels and can only say it has provided positive results. I also have a 2004 1 ton Dodge Cummins that I run a few bottles a year.

[TorqueAddict]

+1 for Power service additive. I have also used Amsoil in the past and both products are equally good.

[BB_cuda]

Originally Posted by richard_tricky

I've got it going to the dealership on Tuesday for them to have a look I have a bmw warranty on it.

I'm guessing fuel treatment is ok to use?

The fuel door or cap is marked to NOT use any additives(at least in North America). You should hold on adding the additive until dealer helps you. I as many others here use additives but I felt important that you knew we are all going against BMW "doctrine".

[richard_tricky]

Originally Posted by BB_cuda

The fuel door or cap is marked to NOT use any additives(at least in North America). You should hold on adding the additive until dealer helps you. I as many others here use additives but I felt important that you knew we are all going against BMW "doctrine".

Yeah I've decided to hold off and see what they say.

I'm slightly concerned that because there are no fault codes and the smooth running adaptions are all in spec that they will just pass the car back to me.

It goes in tomorrow morning.

Will keep all updated.

[Fork!TheSpoonWrecker]

Was the ticking right off the bat or after a certain rpm, cuz mine is doing it after 2-3k rpm on acceleration.

[richard_tricky]

Originally Posted by Fork!TheSpoonWrecker

Was the ticking right off the bat or after a certain rpm, cuz mine is doing it after 2-3k rpm on acceleration.

No it seems to only appear on light throttle / acceleration. If I'm just driving along its all nice and quiet.

It's seems more related to the load on the engine rather a particular rpm

[Fork!TheSpoonWrecker]

Same for me. ill be following this closely.

[richard_tricky]

I'm booked in for around 930 am GMT. But have to leave it with them.

I'm going to try to get to speak to the tech directly as if I just leave a load of notes with the service desk things might not get explained properly.

[richard_tricky]

Right well I got the car back. They ran a few tests and went for a test run and could not find any issue.

They did however reset the injector adaptions as a test measure and things are much quieter.

[Fork!TheSpoonWrecker]

hmmm wonder if this is somethingi can do with carley or not.

[richard_tricky]

I know you can do it with inpa and dis