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Thread: 'Ticking' sound when under load.

  1. #1
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    'Ticking' sound when under load.

    Hi All,

    Just back from 2 weeks up north at Coral Bay and Monkey Mia. Towing our Adventure Offraod Camper.

    Car went wellish, however under load (overtaking or holding speed up hills) it had a distinct 'ticking' sound. If it was one of my previous Holden red motors I'd say it was a tappet sound. Additionally, and possibly not related, for some period there was also a whistle sound. However, this came and went in the middle part of the trip, the ticking was a constant through out when under load.

    When cruising, the car seemed to run perfectly.

    Any thoughts?

    Cheers Gilly.

  2. #2
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    Turbo gasket???

  3. #3
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    I would say the ticking is likely to be the exhaust manifold gasket, probably due to a broken stud at the end with only one stud and a large gap to the next stud. That stud trends to break due to thermal loadings.

    The whistling could be the turbo gasket on the exhaust flange leaking.

    I have had both on mine, which is a twin turbo, so a bit different to yours.

  4. #4
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    Thanks Gents. Seem reasonable suggestions.

  5. #5
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    Quote Originally Posted by BobD View Post
    I would say the ticking is likely to be the exhaust manifold gasket, probably due to a broken stud at the end with only one stud and a large gap to the next stud. That stud trends to break due to thermal loadings.

    The whistling could be the turbo gasket on the exhaust flange leaking.

    I have had both on mine, which is a twin turbo, so a bit different to yours.
    Hi Bob,

    Body off to do these jobs?

  6. #6
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    Rovertech found the exhaust manifold leak when replacing both of my turbos with the body on. They just needed to remove the EGR valves and coolers to get to them and then we got Mark to permanently remove the EGR's from the ECU and left them off.

    The turbo leak happened after they fit the new turbos and started while on a trip to Shark Bay towing my Kimberley Karavan. Interestingly enough, my son in law was towing my Adventure Campers camper trailer behind his Pajero on the same trip. I still own it but they use it now since no one wanted to buy it. Mine has been modified by the previous owner and has independent air suspension, so it rides very well behind the D4.

    That was fixed through the left hand mudguard area without removing anything but was a warranty job for the previous repairs. I might have caused it by showing off to my son's Toyota driving mates and pulling my son's D1 on a trailer up Lesmurdie Hill at about 90kph on a 40 degree day! It got a bit hot and disabled the air con by the top of the hill, although it didn't start to derate power!

  7. #7
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    My 2.7 does it too, but I’m convinced it’s more of a tappety sound. Just when pulling into traffic and giving it a boot under load. Just wear and tear I guess.
    Current - Silver 2007 SE D3
    2005 Defender 110 Wagon TD5 - Gone :(

  8. #8
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    OK. So dropped into Rover Tech today and had a couple of techs drive it. Doesn't really reproduce as well without trailer but got it making the noise a bit under hard acceleration. Lots of head scratching and then onto the diagnostic tool. Ruled out exhaust and turbo (prior to going onto tool) issues by sound of noise. Looking at injector values they think it's an injector problem. I had 3 replaced last year and on the tool it's showing three running perfectly and three, whilst still in spec, running at the top end of the range. So, advice is replace three injectors and see how it goes. I'm a little concerned in spending $2500 or so on a see how it goes.

    Thoughts?

  9. #9
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    Quote Originally Posted by Dagilmo View Post
    OK. So dropped into Rover Tech today and had a couple of techs drive it. Doesn't really reproduce as well without trailer but got it making the noise a bit under hard acceleration. Lots of head scratching and then onto the diagnostic tool. Ruled out exhaust and turbo (prior to going onto tool) issues by sound of noise. Looking at injector values they think it's an injector problem. I had 3 replaced last year and on the tool it's showing three running perfectly and three, whilst still in spec, running at the top end of the range. So, advice is replace three injectors and see how it goes. I'm a little concerned in spending $2500 or so on a see how it goes.

    Thoughts?
    My unqualified gut feeling is this is a potential rabbit-hole of a problem. One I’d be happy to pursue while the car was under warranty, but think long and hard about spending my own hard-earned on.

    So, it may well sort the sound, but given the big dollars involved, I’d be wanting 1) an assurance it’d sort the ticking sound and 2) a bit of intel on what the downside of putting it on hold for a while is. If the car isn’t symptomatic, I’d be holding out till I had a real solid reason to drop that kind of spandoula on it.

    Cheers,

    — andrew

  10. #10
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    I agree with Andrew. There is no need to start replacing injectors unless you have problems due to the injectors, other than a bit of noise.

    It will no doubt get worse and then it will be easier to diagnose. Lenny at Rovertech, who does most of the work on my aging car (280,000km), is pretty good at diagnosing stuff when there is enough evidence. If they are guessing there is obviously nothing actually wrong that they are worried about yet.

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