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Thread: engine pops back thru the exhaust

  1. #1
    Junior Member APPRENTICE
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    engine pops back thru the exhaust

    460 ford installed new cam lifters and springs(hydraulic) new wiand plugs< what can it be

  2. #2
    Senior Member RACING JUNKIE mopar1968's Avatar
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    More info, when does it do this, street car, race car :?: :?:



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  3. #3
    Junior Member APPRENTICE
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    race car, mostly at idle

  4. #4
    Senior Member RACING JUNKIE
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    Valve staying open or closed.....

  5. #5
    Senior Member DYNO OPERATOR
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    Sounds like ya have a valve or two too tight to me! JMO

    TS1955

  6. #6
    Senior Member RACING JUNKIE
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    Sometimes it takes a little while for the lifters to pump up. Make sure you recheck the lash after you run the engine a little while. If there pumped up you should have oil coming off all the rockers.

  7. #7
    Senior Member RACING JUNKIE mopar1968's Avatar
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    Yeah i would have to agree, back the lash off a bit and see what happens :!: :!:


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  8. #8
    Senior Member SENIOR BUILDER
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    maybe u didnt degree ur cam right????

  9. #9
    Member JUNIOR BUILDER
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    Your popping through the exhaust because the vavle lash is too tight on the exhaust valves or lobes going flat on the camshaft.


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