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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » Oil collecting on Intake Manifold

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    5/02/2019 11:24 AM  #1

    timd66
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    Registered: 12/27/2014
    Posts: 9

    Oil collecting on Intake Manifold

    Hello Everyone,

    I used to post here at bit and life got in the way of my project.  A few details about the car:

    1966 Coupe, 347 Stroker motor, Trick Flow Stage II cam, Weiand Stealth Intake, AFR 185 heads, Autolite 4100 Carb tuned to this motor and cam profile,T5 Trans with MS ball-bearing clutch pedal, etc.

    The current issue is that oil is collecting on the driver's side of the intake after a short drive.  There does not seem to be any oil sneaking out through the valve cover breather or gasket.  Any ideas on how to stop the leak?

    Thanks,

    -Tim
    [img] [/img]
     

     

    5/02/2019 11:51 AM  #2

    Gaba
    Senior 24-7 FYI Addict

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    From: Van Alstyne Texas
    Registered: 1/15/2014
    Posts: 1,009

    Re: Oil collecting on Intake Manifold

    thats coming from the bolt itself thats holding the intake down. you may have to take those bolts off.. best thing would be to take off the manifold, and redo the gasket , as the gasket is letting oil up from the block in close to the bolt, which is seeping up.
    You will probably have to use RTV in conjuntion with the gasket to make sure this leaks doesnt happen

    MS here is the one who helped me do mine, when I was afraid to take bolts off the car :D :D .. haha . I had similar issues.
     

    If it aint broke, I have'nt tried to "Fix" it yet!
     

    5/02/2019 11:54 AM  #3

    timd66
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    Registered: 12/27/2014
    Posts: 9

    Re: Oil collecting on Intake Manifold

    Thanks!  I will get the new gasket and reseal.  Can't have my car leaking oil after all the grief I give my Chevy friends about their oil leaks.

       •Thread Starter
     

    5/02/2019 12:21 PM  #4

    Gaba
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    From: Van Alstyne Texas
    Registered: 1/15/2014
    Posts: 1,009

    Re: Oil collecting on Intake Manifold

    HAHAHA.. I never make that comment, as my 65 used to leak like a sieve. One gasket at a time I am getting it under control :D

    If it aint broke, I have'nt tried to "Fix" it yet!
     

    5/02/2019 12:43 PM  #5

    TimC
    I FYI 24-7

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    From: Wheaton, Illinois
    Registered: 4/01/2013
    Posts: 876

    Re: Oil collecting on Intake Manifold

    Hey!  Nice to see another Tim in this Sea of Steves….
    Gaba's right about the source of the leak, but I would check the torque on those bolts before taking stuff apart.  Of course, this assumes you would rather drive it, than work on it....  BTW my 289 leaks in the same spot....after making sure intake was torqued properly.  A couple bolts did tighten a bit, and the leak slowed a bit.
     

     

    5/02/2019 1:13 PM  #6

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,524

    Re: Oil collecting on Intake Manifold

    Those damn four bolt valve covers.  Only way I found to keep them sealed was to run cast valve covers and rubber/steel gaskets.  The center bolt ones sealed better because they raised the valve cover rails so oil didn't sit against the gaskets. 

    We can all agree at least its not a dodge (drops oil drips grease everywhere). 

     

    5/03/2019 12:15 AM  #7

    jkordzi
    I FYI 24-7

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    From: Sequim, WA
    Registered: 12/28/2013
    Posts: 927

    Re: Oil collecting on Intake Manifold

    Not sure I can tell from the photos you posted, but do you have a PCV valve plumbed to the carb?

    Cheap, Fast, Good:  Pick Any Two
     

    5/04/2019 10:08 AM  #8

    Ron68
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    From: Mukilteo, Washington
    Registered: 4/01/2013
    Posts: 1,589

    Re: Oil collecting on Intake Manifold

    timd66 wrote:

    Thanks!  I will get the new gasket and reseal.  Can't have my car leaking oil after all the grief I give my Chevy friends about their oil leaks.

    Check out this procedure by MS:
    https://www.mustangsteve.com/intake.html
     

    68 coupe - 351W, 4R70W, 9" 3.25 -- 65 convertible - 289 4v, C4, 8" 3.00
     

    5/05/2019 2:47 PM  #9

    MS
    Forum Originator

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    From: Canyon Lake, Texas
    Registered: 1/24/2013
    Posts: 12,299

    Re: Oil collecting on Intake Manifold

    Front seal on the intake manifold can also cause that.  Also distributor seal or timing cover seal.  But the timing cover seal usually also leaves a telltale puddle on the cover itself.   The fan will blow it up and along the valve cover rail.
    If bolts are leaking, an aluminum or copper washer will seal them.  Thread sealer MIGHT seal them, but you are screwing them into an oil-covered hole, so don't expect much.

    Money you enjoy wasting is NOT wasted money... unless your wife finds out.
     

     

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