Engine & Gearbox Noise at idle - or nothing to worry about?

Discussion in '6th Generation (1997-2002)' started by Roylewaa, Tuesday 2nd Apr, 2013.

  1. Roylewaa Club Member ★ ☆ ☆ ☆ ☆

    My 2.0 6th Generation has always had a thunk thunk thunk noise when its at idle, the noise is not present or consistant with engine speed, just when at idle, is otherwise smooth and quiet when being driven

    At first I thought it was the Valve clearances needed adjusting so had those done however the noise still persists

    Here is a quick vid, you can hear the noise in the cabin when at idle and from under the bonnet, it is not present at any other time

    Click on image for video
    th_IMG_1158_zps2daf8b83.

    Anyone have any ideas? Hoping it is normal, although my mates 1.8 does not do it

    Thankyou for any advice
     
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  2. SpeedyGee Administrator Staff Team

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    Hmmm, a little hard to tell exactly what it is from that video.

    Does it go away if you press the clutch pedal in ?
     
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  3. Roylewaa Club Member ★ ☆ ☆ ☆ ☆

    No it doesent, already ruled out the thrust bearing
     
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  4. philoldsmobile Club Member ★ ☆ ☆ ☆ ☆

    Hard to tell, but it sounds pretty normal in the video One possible candidate, it may be a little bit of piston slap - totally harmless if it is. (its possible its being transmitted along the block though the engine mount) does it get less pronounced with a warm engine? when was the cam belt last changed (although it doesn't really sound cam belt related to me)

    How many miles does the car have?
     
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  5. Roylewaa Club Member ★ ☆ ☆ ☆ ☆

    Piston slap did cross my mind, however the noise is more predominant when the engine is up to temp, I've had cars with piston slap and that only occurred when the engine was cold

    I'm going to try an oil change with good quality oil to see if that makes any difference

    mileage is 107k with full service history
     
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  6. Ichiban Founder Staff Team

    England CJ Leeds
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    I have the same noise on my 1st Generation when cold when the engine is warm its gone.I would say that a piston slap, small end gudgeon pin play. It it was bottom end then that will remain all the time.
     
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  7. Roylewaa Club Member ★ ☆ ☆ ☆ ☆

    Yeah I would be really concerned if it was there all the time, soon as I pull away or blip the throttle the noise disappears
     
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  8. philoldsmobile Club Member ★ ☆ ☆ ☆ ☆

    Might seem an odd question, but is the air con on, or the front screen de-mister on in the video? when checking my air con ready for summer today, I noticed pretty much exactly the same noise at idle, but only with the air con on - its just a little A/C compressor noise. Mine also disappeared with a blip of the throttle, and returned at idle. turn the air cone off, and it goes. Air con is still nice and cold, and considering it was last gassed in 2010 i have to conclude its holding pressure well. I'm going to re gas before driving it to spain in September, but its nothing to worry about. (i've had FAR noisier compressors)
     
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  9. Roylewaa Club Member ★ ☆ ☆ ☆ ☆

    The symptoms on yours are exackly the same as mine, however I always have my aircon turned off (it always says A/C Off in the display)
    Its got me thinking though if is it related to the aircon compressor, maybe the clutch is sticking causing it to be on constantly??

    I might have had the windscreen demister on as that video was done mid December, usually though I have it set to the screen demist and my feet with the fan on 3 all the time
     
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  10. Roylewaa Club Member ★ ☆ ☆ ☆ ☆

    Had the car to a garage this morning as still trying to get to the bottom of the noise

    They suspect it could be a noisy Idler/pully and recommended I have the timing belt done, quote was £260 including new waterpump

    Currently weighing this up, quite an expensive diagnosis and I'm worried this may not cure it, it was supposed to have had the belt and balance belt done at 83k in 2010

    As I've said soon as the mechanic blipped the throttle the noise goes away, then returns when the car returns to idle
     
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  11. SpeedyGee Administrator Staff Team

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    Use a long screw drive as a stethoscope put it on the timing cover and listen for the noise. This should enable you to confirm if the noise is coming from the timing belt area.

    BE EXTREMELY CAREFUL OF STAYING AWAY FROM THE MOVING BELT.

    If its a noisy tensioner you probably want to get it changed pretty quickly as it may not just be noisy it may also be failing to tension correctly. It the belt breaks or slips a notch or two you'd be in for much much bigger bill.

    If you're in doubt about the diagnoses, then just take it to another garage for a second opinion.
     
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  12. Roylewaa Club Member ★ ☆ ☆ ☆ ☆

    Will definitely be getting a 2nd opinion on it, as its £260 I could do without spending at the moment
    I will try the screwdriver method tomorrow

    To my calculations it's made the noise for coming up to 5 months now so need it sorting
     
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  13. Craig Carling Junior Member ☆ ☆ ☆ ☆ ☆

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    I had a Mondeo that made the same noise, in the same manner described. It was a belt tensioner, apparently a very common problem. I was told it could last the lifetime of the car or it could fail tomorrow. I didn't like those odds, so I got it changed. 150 quid all in. It started doing the same thing 6 months down the line. crappy fords!
     
  14. Roylewaa Club Member ★ ☆ ☆ ☆ ☆

    Funny though as when started from cold the sound is not there, although the choke is on so rpms are 1200, however it still doesent present itself until fully warmed up

    Could well be the cambelt is due as I just took the guys word for it that it had been done, they're is nothing at all in the history to suggest it has been done, that's a scary thought, potentially 107k on the same cambelt kit:Aghast: Even if it has what's to say someone hasint just whacked a new belt on, nothing else, I've seen that done by garages aswell:Angry:

    I certainly don't like the it could or won't go, I would rather the peace of mind it won't

    Thinking back I had a 6th Generation Escort GTI that made a similar noise, just more grumbelly, took the cambelt cover off and was surprised to see a crack on one off the pulleys, and was not impressed to see they were plastic, come on Ford:Foolish:
     
    Last edited: Thursday 18th Apr, 2013
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  15. exec Premium Member Club Supporter

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    Pretty sure my Accord makes the same noise, thought it was normal, a bit worried now...
     
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  16. Craig Carling Junior Member ☆ ☆ ☆ ☆ ☆

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    awww ROYAL!!! Look what you started!!! that's it, i'm off into business selling Accord pulleys!
     
  17. philoldsmobile Club Member ★ ☆ ☆ ☆ ☆

    mine is definitely air con compressor, as it cuts in and out according to air con on or off. it also comes from the air con compressor when you do the screwdriver trick. My car is on ots third cam belt, despite being a 2002 model with 136,000 miles, its only due to be on its second but its ben over maintained by previous owners.
     
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  18. exec Premium Member Club Supporter

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    Hi there

    Did you get this problem sorted at the end?

    I have a very similar problem: Engine Video

    I really hope its not timing belt related, similar to yours previous owner claims belt has been changed but no obvious info in the service records, just some reciepts, mines does 82k too.

    Cheers
     
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  19. Ichiban Founder Staff Team

    England CJ Leeds
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    is that engine bone cold? or at normal operating temperature . From the engine revs its seems to be cold.

    BTW its a very tidy looking engine bay.
     
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  20. exec Premium Member Club Supporter

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    Thanks the car in general is very clean, underbody is near spotless! Shame the bodywork has scuffs and chips!

    It was normal engine temp, don't recall the noise at cold temp. Hope its nothing pricey as I have the brake discs, pads and a service to do! :Frown:

    The engine and some connected parts vibrate fairly pronouncedly too.
     
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