rattling/clicking noise from the engine

[Peter86]

I have had this rattling noise coming from my engine and i cant seem to source the problem. As you all know, its really hard to describe a rattling/clicking noise but i will try...

It is loudest around 2500rpm, if i rev it hard.... passed 2500rpm it goes quiet, then as the revs drop back down, when it drops passed 2500you will hear it again befroe the revs go to zero.(vibration maybe?)

I have had my head in the engine bay whilst someone has been holiding it on 2500 and cannot seem to pin point where it is coming from, its hard to hear when your head is in the engine bay, but you can hear it clearly from the drivers seat. It sounds like its coming from the back of the engine but im not sure...

Have anyone else had any annoying rattles? im running out of ideas, are there common places i should look?

I know its a long shot, but any help appreciated

[highlander]

What type of engine has your car got?

[poddack]

can you see any metal filings? educated guess would be youe crankshaft pulley.

[poddack]

engine mounts also

[steve_earwig]

2.2HDi (I think) I presume it has the same issues as the 2.0 so most worrying is the crank pulley (metal filings as Poddack) - failure can take out the cam belt, or it could be the perennial injector noise (does it cut out at 3,200rpm?)

[Doggy]

FWIW my 2.2 doesn't have the 'injector noise', but my previous HDi 90 did.

Exhaust flexi joint?
Cat-Fap heat shield?

Usually worth running it up with the aux drive belt off to eliminate some stuff....

[CountryPug]

can you see any metal filings? educated guess would be youe crankshaft pulley.

I would endorse this, my HDi started showing the same symtoms you've described last week. Got the pulley replaced and she's running sweetly again

[chrisk]

I find my 2.0 HDi engine quite tappy. I have my engine management light on just recently and a message at start up saying 'engine antipollution device faliure' or words to that fact. Can anyone point me in the right direction as to fault...egr, injuector?

Car starts and drives ok and getting 43 mpg on my 7 mile each way trip to work (morning and evening), driving quite gently too...1500-2500rpm. Car done 80k, just been serviced at home and gonna get timing belt done this weekend. Also I get engine/fumes smell in the car when stationary or slow manouvering. Can't hear any exhaust blowing either?

Update.....

Well will defo need something looking at as things took a turn for the worse yesterday and this evening. Car appears to run nice and smooth with ordinary driving upto 2500rpm. A gave it a bit of hard accelleration through the gears yesterday revving upto around 4000rpm and there was plenty of black smoke out the back, but once into 4th it started clattering really badly, like a loud tapping noise, I lifted off and drove on light throttle as i had to keep flow with the traffic and the tapping continued for around half a mile than just stopped. Obviously I just kept the throttle quite light. Went to work as normal today. This evening I thought i'd try revving it again to see if there was going to be a repeat of the symtoms. I only revved through the gears upto around 3500rpm and then into 5th and upto motorway speed. Then after half a mile at constant speed it started clattering/tapping and the engine managment light came on and the car appeared to go into limp mode, but it got worse as it just crawled to a halt and cut out out. Engine and oil temps were normal. After a couple of attempt to restart it fired up and I managed to get home with what appears to be a normal running car, apart from the engine managment light is now on. It appears the symtom only appears when the car is driven hard or abave 3000rpm....any ideas

[Doggy]

Chris,

Exhaust fumes in the car are usually the result of a leaky flexi section, (just below the turbo).

Pure guesswork here, but I think you're describing incorrect injection timing - could be faulty crank sensor, but could easily be something else.

Your ecu will have logged at least one fault code - do you know anyone who could read it for you?

(If you add your location, someone nearby might offer to help).

[chrisk]

Thanks for reply, I am in Newark, Notts. A friend of a friend is looking at it today and his initial thought was injector, but Obviously I have no real idea as these modern diesels are a little beyond me.

[Peter86]

FWIW my 2.2 doesn't have the 'injector noise', but my previous HDi 90 did.

Exhaust flexi joint?
Cat-Fap heat shield?

Usually worth running it up with the aux drive belt off to eliminate some stuff....

Thanks for the replies guys, my car is a 2.2 HDI as dogslife said. Im not convinced the error is that serious (i could be horribly wrong).
I am going to check the above, as this does sound like where it is coming from....

Where should i check for metal fillings?

[Doggy]

If there are any filings to be found they should be in the area of the crank pulley - the outer bit that drives the aux belt is a 'dual mass' unit, i.e. inner & outer metal bits connected by a rubber bush. The rubber wears, then the metal bits rub on each other making a racket and shedding debris that can look like shiny metal fragments or just rust stains.

Easiest way to check is to remove the cover behind the front drivers side wheel, you should see the pulley easily then.

[chrisk]

Thanks for reply, I am in Newark, Notts. A friend of a friend is looking at it today and his initial thought was injector, but Obviously I have no real idea as these modern diesels are a little beyond me.

UPDATE......

Well my mate diagnosed a sticking valve or hydraulic lifter. He had added a treatment to see if this can remedy things before considering head removal Symtoms only occurred with high rpm, and followed with immissions light fault. I have tried revving it when warm a few times and all seems well. I'm unsure what he has put in the oil.....a flush or an addative.....need to find out as an oil change matbe required just done it 2 weeks ago with Mobil S 10w40 semi-synthetic. I'm thinking of changing to 5w30 or 5w40 fully sythetic to aid circulation on the short journeys I do and the pending cold weather.

[Peter86]

Thanks for all your replies guys, the noise coming from my car was my crankshaft pulley. Changed it last night and she is running sweet as a nut!

[chrisk]

Thanks for all your replies guys, the noise coming from my car was my crankshaft pulley. Changed it last night and she is running sweet as a nut!

Glad you got it sorted, sorry to hijack your thread, but the title seemed appropriate with potentially similar fault. Appears to be sticky valve/lifter