Oil Coming Out Of Dip Stick Tube
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Oil Coming Out Of Dip Stick Tube

  1. #1
    Member Romper Stomper's Avatar
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    Default Oil Coming Out Of Dip Stick Tube

    Pontiac 400, aluminum heads, 10.5:1 CR, .530 lift roller cam. Breather in both valve covers and pcv valve in valley pan plummed to manifold. Get it above 4k rpms and it blows oil out of the dipstick tube. Any ideas or suggestions?

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    Quote Originally Posted by Romper Stomper View Post
    Any ideas or suggestions?
    Leak down test.

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    Senior Member 67weiman's Avatar
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    Windage... Is this a new motor or did it just start doing this?

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    Member Romper Stomper's Avatar
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    Quote Originally Posted by 67weiman View Post
    Windage... Is this a new motor or did it just start doing this?
    New top end. The bottom end has about 2k miles on it. It just started when I put the new heads on. I checked out the cylinders when I had the heads off and they all looked good. Nice crosshatch still on them. It only does it when it's under a load. Do I need to run more lines to the manifold?

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    Platinum Member BigSteve's Avatar
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    Quote Originally Posted by Flusher View Post
    Leak down test.
    X2 good starting point

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    Senior Member Skydog's Avatar
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    Quote Originally Posted by Romper Stomper View Post
    New top end. The bottom end has about 2k miles on it. It just started when I put the new heads on. I checked out the cylinders when I had the heads off and they all looked good. Nice crosshatch still on them. It only does it when it's under a load. Do I need to run more lines to the manifold?
    Yea just check compression/leak down if good do the old spark plug boot trick on dip stick. Worked great for me 6000+rpm all day zero oil any where!!! Yess :-) :-)

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    Senior Member VAMI's Avatar
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    Does it have the factory windage tray?Also does it have the correct dipstick tube inside the block?

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    Senior Member 67weiman's Avatar
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    I would think that if it just started aftera top end swap, I would start with a leak down teat as stated already.

  11. #9
    BUN
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    My 496 with aluminum heads was doing the same thing. Mechanic said don't worry about it, two weeks later lost compression in my #4 cylinder and now have a bad ring. Found it in time that I just need a rebuild instead of an entire new block. Leak down test would definitely be the first place to start, hope you have better results than I did!

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