Do diesels suffer from tappet noise?

Discussion in 'Tech/Mech General' started by stevec, Sep 7, 2014.

  1. stevec

    stevec Funster

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    Just been out in the MH to give the wife some experience driving it before our trip to France next week (I will make no comments about women drivers!). I noticed what I can only describe as a slight tappet noise when the engine was under load (I think she has a heavier right foot than I do!). This is not present at constant speed. Engine is a Peugeot 2.2 HDi (2006) with 18k on the clock . I've very little experience of diesel engines so just thought I'd throw this observation in for people's comments. It's not very pronounced, but is a sort of dull clicking sound when accelerating.
     
  2. Mousy

    Mousy Funster Life Member

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    Hi Steve, we can't hear our engine over the noise of rattling crockery, but someone useful will be along in a sec.
     
  3. Flyingscotsman2

    Flyingscotsman2 Banned

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    Check the oil level wen they are cold they can be a bit more noisy
     
  4. DJA

    DJA Funster

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    Hi Stevec

    I am reluctant to mention this but.

    We had a 2008 Peugeot based van which developed a tappit noise at a similar mileage and no one could identify the problem. No drop in MPG or power noticed. We exchanged the van to our current one and the dealer was aware of the noise when we did it. Their mechanic had looked at it and thought it was air getting in as there appeared to be a leak on the diesel filter.

    It turned out the Peugeot based van had a Ford Engine and when they took it to a diesel expert he said immediately on hearing it that it was a known fault with the Ford Engine and I was told it was a new lower Engine Block and cost them £3000. I believe when the engine was dismantled the bore of one of the cylinders was scored. The expert also said that the Peugeot agent we had asked about should have known what it was. The vehicle was only a few months out of warrantee and Peugeot did not want to know apparently

    We traded it in in all innocence and I think they believe that is the case.

    I really hope this is not your problem but they do make a lot more noise than Petrol cars. Some more than others.

    Sorry Stevec I certainly don't expect a like from you with this one.
     
    Last edited: Sep 7, 2014
  5. johnp10

    johnp10 Funster

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    Think London taxi.
     
  6. tonytange

    tonytange Funster

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    Hi stevec your noise sound may be disel detonation which is caused by fuel burning to soon like pinking on petrol engine this can have a detrimental effect on your engine, if it doesn't happen when you drive it may just be carbon build up with low load driving or have you changed you're disel supplyer its well worth getting vehicle checked on diagnostic computer as their are a number of sensor faults that could be causing this to happen
    Hope this helps tony
     
  7. DBK

    DBK Funster

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    If the noise comes and goes with load it isn't tappets. It could be something nasty like little ends but running the tank down and then trying a tankful of something like Shell Premium or whatever it is called might be worth it, and/or add a suitable fuel additive - your local garage should have a selection, just find something for cleaning carbon. Probably a wild goose chase but worth trying before you look for expensive solutions.

    An experienced engine mechanic could put a stethoscope on it and give you a better diagnosis.
     
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  8. Wildbill

    Wildbill Funster

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    it could just be driving style are they hydraulic or just standard tappets.
     
  9. Scattycat

    Scattycat Funster

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    Both vans that we have had somtimes do it under load and we get the same problem with our Megane.
    The noise usually disapears if I change down a gear

    I've been in a number of other vehicles, cars and vans owned by friends and they nearly all seem to have the same problem.

    I just put it down to being a diesel.
     
  10. Wildbill

    Wildbill Funster

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    is it hydraulic tappets ?
     
  11. DBK

    DBK Funster

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    Could be injectors? If so, probably nothing to worry about.
     
  12. DBK

    DBK Funster

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    A bit of Googling suggests it probably has. But just noticed this 2006 vehicle has only done 18K so it shouldn't be anything serious.
     
  13. Wildbill

    Wildbill Funster

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    fist thing injector cleaner and a steady run to se if it helps
     
  14. Wildbill

    Wildbill Funster

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    was thinking drawing air on oil filter.
    or oil broken down
    even wrong oil
     
  15. DuxDeluxe

    DuxDeluxe Funster Life Member

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    Sons car is a 55 plate focus with the 1.6 TDCI engine ( similar engine as also a Citroen Peugot joint venture) which has made a similar noise since we had it as a new car. It has now done 148,000 miles.
     
  16. pappajohn

    pappajohn Funster Life Member

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    My first guess is dirty injector spray pattern.

    As Bill said....a bottle of fuel system cleaner first.
     
  17. Badknee

    Badknee Funster

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    If it wasn't up to temp the engine internals would not have totally expanded.
    Different metals expand with heat at slightly different rates, that's why you should never thrash a cold engine.

    As has been said give it a fuel flush and see what happens when it's properly up to temp.
     
  18. tambo

    tambo

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    I there's many different things that can cause this .... to be honest asking for advice on this on a forum probably won't give you much help as you will get a multitude of answers ranging from nothing to worry about -to your engines about to blow up.

    My best advice would be to take it for another drive with yourself driving see if it makes the same noise , check oil levels , have a listen under the bonnet with the engine running see if you can identify which area the noise is coming from ie top of engine bottom left side both sides etc .....if you know a reliable trustworthy garage near by let them have a listen

    It's very difficult to pinpoint without actually hearing it in person and some of the answers you'll get online will have you worrying needlessly till its properly checked
     
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  19. stevec

    stevec Funster

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    Thanks everyone for your input. I appreciate that it is difficult to diagnose without actually hearing the noise. I have a particularly sensitive ear to anything abnormal but this is our first MH so don't know what abnormal is. I shall monitor the situation in our time away in the next few weeks. I shall also put in a dose of injector cleaner in the next tankful (any recommendations?).

    Incidentally I changed the oil for the correct grade/make (I believe it was Total 9000 10W40) along with the oil filter very recently. I can't recall whether it made the noise before that.

    Edit: Of course my wifes solution is by far the best.....turn the radio up!
     
  20. jezport

    jezport Funster

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    If your van has Ford injectors it is common for them to fail. Usual symptoms can be tapping noise when cold and sometimes black smoke on acceleration.
     
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