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Thread: V8 lifter noise?

  1. 11th March 2017, 08:28 AM #1
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    tommo1166
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    V8 lifter noise?

    Hi all,
    Hope this attachment works, and you can hear it ok. This engine was rebuilt over Xmas New Year period, has 4.6 flanged liner block, new cam and lifters, billet oil pump (reason for rebuild was blown oil pump) new rocker shafts and arms and only covered about 3,000 km.
    Then a couple of weeks back this ticking noise started, it is intermittent, engine temp doesn't seem to make a lot of difference, seems to fade out with revs.
    Plenty of power, no rough running, no faults on Nanocom, just this annoying tick that shouldn't be there. Tried a tin of LiquiMoly Stop Tappet Noise, seemed a bit of improvement, but not much. So I suspect a faulty lifter, but could there be another reason? And if it is a faulty lifter, any ideas on how to identify the faulty one as I shouldn't need to replace full set. Anyway, have necessary gaskets and a couple of new lifters on the way, then need to find time to investigate

    Thanks in advance
    Tommo
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  2. 11th March 2017, 02:29 PM #2
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    Does sound like lifter. Cheers
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  3. 11th March 2017, 02:56 PM #3
    PhilipA
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    Did you check your preloads when you assembled the motor?
    Supposed to be 20-50 thou. If too large it could cause the noise, or it could be a cam lobe .

    Have you also checked for a leak in the exhaust manifold as they sometimes can sound uncannily like a tappet.
    Regards Philip A
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  4. 11th March 2017, 07:32 PM #4
    ballbag
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    If it disappears with revs (ie- oil pressure) then my guess is a lifter.
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  5. 12th March 2017, 05:59 AM #5
    Graeme
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    Quote Originally Posted by tommo1166 View Post
    if it is a faulty lifter, any ideas on how to identify the faulty one
    I've worked my way along the bottom of the head with a large screw-driver with my ear against the handle to pin-point the culprit.
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  6. 12th March 2017, 11:22 AM #6
    Roverlord off road spares
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    Quote Originally Posted by PhilipA View Post
    Did you check your preloads when you assembled the motor?
    Supposed to be 20-50 thou. If too large it could cause the noise, or it could be a cam lobe .

    Have you also checked for a leak in the exhaust manifold as they sometimes can sound uncannily like a tappet.
    Regards Philip A
    He fitted a new cam, shouldn't be worn away after so few kms

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  7. 12th March 2017, 11:25 AM #7
    Roverlord off road spares
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    O.E parts or Aftermarket?

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  8. 12th March 2017, 11:51 AM #8
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    It shouldn't be making a noise agreed. I would have used aftermarket cam (Crowe/Ivan Tighe/ProCam etc) and lifters as a kit over OEM but in either case there should be a noise
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  9. 12th March 2017, 12:18 PM #9
    PhilipA
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    I had a new aftermarket stock 3.9 cam wear down lobes within 3000Km, and it was run in properly for 20 minutes.

    Regards Philip A
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  10. 12th March 2017, 12:21 PM #10
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    Hell. Yep I only like well known and tested aftermarket performance gear. Cheers
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