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    Author Topic: Detecting exhaust manifold leak  (Read 5552 times)

    Offline tommyg29

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    Detecting exhaust manifold leak
    « on: January 16, 2016 - 03:02:42 PM »
    My 400-4 has developed and ticking noise, I think on the left side, and I think/hope its the manifold gasket. I have a hard time telling the difference between that and bad valve ticking. I tried tightening up a couple bolts that were maybe a ratchet click or two loose, but hasnt helped. Under #7 does this look like a leak? Any advice?


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    72 Roadrunner 400-4 Auto-3.23 Gear-Black Cruiser
    71 Cuda 440-6 Tribute-Limelight-A833 Close Ratio-4 Sp-Pistol Grip-Dana 3.54 Powr Lok-Rally Dash-Shaker (Sold)
    92 Dodge Stealth RT-Twin 15g Turbos-SAFC2 Tuned-Mystic Blue-5 Sp-AWD-Rear Wheel Steering-AutoX'r (Sold)
    12 Dodge Charger SXT Plus Blacktop Package-3.6L-8 Sp-Leather-Nav (the wife's)

    Multiple SRT's, Rams, Dakotas, Caravans and Neons

    ...the lines on the road just look like dots!....


    Offline soundcontrol

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    Re: Detecting exhaust manifold leak
    « Reply #1 on: January 16, 2016 - 03:06:39 PM »
    I had them also, take out the gasket and look at it, its usually visable on the gasket. There is probably some other tricks to find leaks also.
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    / Ken
    Restoration thread: http://www.cuda-challenger.com/cc/index.php?topic=102525.0
    topic=108917.new#new

    Offline dodj

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    Re: Detecting exhaust manifold leak
    « Reply #2 on: January 17, 2016 - 09:03:08 AM »
    Looks like a leak to me.
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    Scott
    1973 Challenger  440 4 spd 
    2007.5 3500 6.7 Cummins Diesel, Anarchy tuned.
    Good friends don't let friends do stupid things. ........alone.

    Offline tommyg29

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    Re: Detecting exhaust manifold leak
    « Reply #3 on: January 17, 2016 - 12:14:03 PM »
    Can anyone identify the gasket I have so I get the same one  :bigsmile:
    Or which one is recommended most?
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    72 Roadrunner 400-4 Auto-3.23 Gear-Black Cruiser
    71 Cuda 440-6 Tribute-Limelight-A833 Close Ratio-4 Sp-Pistol Grip-Dana 3.54 Powr Lok-Rally Dash-Shaker (Sold)
    92 Dodge Stealth RT-Twin 15g Turbos-SAFC2 Tuned-Mystic Blue-5 Sp-AWD-Rear Wheel Steering-AutoX'r (Sold)
    12 Dodge Charger SXT Plus Blacktop Package-3.6L-8 Sp-Leather-Nav (the wife's)

    Multiple SRT's, Rams, Dakotas, Caravans and Neons

    ...the lines on the road just look like dots!....

    Offline roadman5312

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    Re: Detecting exhaust manifold leak
    « Reply #4 on: January 17, 2016 - 12:28:26 PM »
                I've been using Percy's soft aluminum gaskets with very good results.     http://www.summitracing.com/parts/php-66036/overview/year/1972/make/dodge
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    Offline Chryco Psycho

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    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: Detecting exhaust manifold leak
    « Reply #5 on: January 17, 2016 - 07:41:00 PM »
    My question is why are you using gaskets at all  the factory never did !
     Just use a thin layer of high temp Ultra copper silicone & bolt it up , gaskets always cause the leaks
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    Challenger - You`ll wish You Hadn`t

    Offline tommyg29

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    Re: Detecting exhaust manifold leak
    « Reply #6 on: January 17, 2016 - 10:05:37 PM »
    Thanks for the tips.
    I will try without the gasket first and hopefully Ill be able to remove the 6 nuts and bolts without much trouble, though with my luck I know I'll probably break a stud or have some other issue.
    Then I hope it fixes the problem. I still dont know for sure its not a valve or rocker noise of some sort.
    Logged
    72 Roadrunner 400-4 Auto-3.23 Gear-Black Cruiser
    71 Cuda 440-6 Tribute-Limelight-A833 Close Ratio-4 Sp-Pistol Grip-Dana 3.54 Powr Lok-Rally Dash-Shaker (Sold)
    92 Dodge Stealth RT-Twin 15g Turbos-SAFC2 Tuned-Mystic Blue-5 Sp-AWD-Rear Wheel Steering-AutoX'r (Sold)
    12 Dodge Charger SXT Plus Blacktop Package-3.6L-8 Sp-Leather-Nav (the wife's)

    Multiple SRT's, Rams, Dakotas, Caravans and Neons

    ...the lines on the road just look like dots!....

    Offline Racer57

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    Re: Detecting exhaust manifold leak
    « Reply #7 on: January 17, 2016 - 10:21:00 PM »
    If your planning on not using a gasket, take the manifolds to a machine shop to get resurfaced first.
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    Offline Chryco Psycho

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    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: Detecting exhaust manifold leak
    « Reply #8 on: January 18, 2016 - 08:18:56 AM »
    just put a straight edge on it , it is probably fine
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    Challenger - You`ll wish You Hadn`t

    Offline solarguy

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    Re: Detecting exhaust manifold leak
    « Reply #9 on: January 18, 2016 - 09:16:08 AM »
    Take a look here before you make your final decision.  They work great

    http://catalog.remflex.com/
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    Offline Chryco Psycho

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    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: Detecting exhaust manifold leak
    « Reply #10 on: January 18, 2016 - 12:31:12 PM »
    I have lost count of how many engine & cars I have built restored or worked on but I have NEVER used gaskets or planed a manifold yet
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    Challenger - You`ll wish You Hadn`t

    Offline TelisSE440

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    Re: Detecting exhaust manifold leak
    « Reply #11 on: January 18, 2016 - 02:56:26 PM »
    I will try the next time take off my headers, I will use some rtv seal, hope it works.
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    Offline soundcontrol

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    Re: Detecting exhaust manifold leak
    « Reply #12 on: January 18, 2016 - 03:48:24 PM »
    I could see no gasket working on regular manifolds with a good sealer, but on headers?
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    / Ken
    Restoration thread: http://www.cuda-challenger.com/cc/index.php?topic=102525.0
    topic=108917.new#new

    Offline dodj

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    Re: Detecting exhaust manifold leak
    « Reply #13 on: January 18, 2016 - 07:22:13 PM »
    Quote from: solarguy on January 18, 2016 - 09:16:08 AM
    Take a look here before you make your final decision.  They work great

    http://catalog.remflex.com/

    I used remflex on my headers on the 440. So far they are good.
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    Scott
    1973 Challenger  440 4 spd 
    2007.5 3500 6.7 Cummins Diesel, Anarchy tuned.
    Good friends don't let friends do stupid things. ........alone.

    Offline tommyg29

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    Re: Detecting exhaust manifold leak
    « Reply #14 on: January 18, 2016 - 08:23:53 PM »
    Mine are hp manifolds. Not sure if theyre the originals though.
    Logged
    72 Roadrunner 400-4 Auto-3.23 Gear-Black Cruiser
    71 Cuda 440-6 Tribute-Limelight-A833 Close Ratio-4 Sp-Pistol Grip-Dana 3.54 Powr Lok-Rally Dash-Shaker (Sold)
    92 Dodge Stealth RT-Twin 15g Turbos-SAFC2 Tuned-Mystic Blue-5 Sp-AWD-Rear Wheel Steering-AutoX'r (Sold)
    12 Dodge Charger SXT Plus Blacktop Package-3.6L-8 Sp-Leather-Nav (the wife's)

    Multiple SRT's, Rams, Dakotas, Caravans and Neons

    ...the lines on the road just look like dots!....
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