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    Author Topic: lifters rattling at high RPM  (Read 622 times)

    Offline 70burntorangeT/A

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    lifters rattling at high RPM
    « on: March 19, 2010 - 07:59:37 PM »
    the lifters in my 440 rattle pretty bad at about 3500 rpm and higher, what can i do to stop this? I run 93 octane shell v-power gas in it and i run castrol GTX HD 10w-30 motor oil with a quart of Lucas oil treatment and it is not low on oil at all...im actually running it a half quart more then it should because it burns a little bit of oil.
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    66 f-100 black  240 straight 6  3 on the tree.....currently blown up :(
    70 challenger burnt orange 440 727 3:23-weekend cruizer


    Offline brads70

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    Re: lifters rattling at high RPM
    « Reply #1 on: March 19, 2010 - 08:38:26 PM »
    Are you sure it's not an exhaust leak?
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    Brad
    1970 Challenger 451stroker/4L60 auto OD
    Barrie,Ontario,Canada
    Proud to own one of the best cars ever made!!!!!

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    Offline Changin Gears

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    Re: lifters rattling at high RPM
    « Reply #2 on: March 19, 2010 - 08:56:25 PM »
    Sounds like detonation, turn the timing back a few degrees and see it it goes away.
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    The goal never changes - Stop the 60' timer with your back tires

    Offline MEK-Dangerfield

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    Re: lifters rattling at high RPM
    « Reply #3 on: March 19, 2010 - 08:57:03 PM »
    At 3500RPM it is hard to believe it is lifters rattling. What is the compression ratio of your engine? If 9.5:1 or lower. 93 octane would be fine. Maybe your timing is too far advanced as in this is pinging rather than rattling?
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    Mike

    1970 Challenger - SOLD
    2016 SXT+.  1 of 524 SXT+'s in Plumb-crazy for 2016.

    Offline 70burntorangeT/A

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    Re: lifters rattling at high RPM
    « Reply #4 on: March 19, 2010 - 11:14:49 PM »
    im pretty sure its 9.5:1. I had 2 header bolts that i tightened about a quarter of a turn and all of the others were so tight that i couldnt budge them so im thinking it isnt an exhaust leak. Ill look into the timing thing
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    66 f-100 black  240 straight 6  3 on the tree.....currently blown up :(
    70 challenger burnt orange 440 727 3:23-weekend cruizer
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