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Water Restrictor Plate - 351C - New ~ 1970 - 1973 Mercury Cougar / 1970 - 1973 Ford Mustang

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Water Restrictor Plate - 351C - New ~ 1970 - 1973 Mercury Cougar / 1970 - 1973 Ford Mustang - 53234
Water Restrictor Plate - 351C - New ~ 1970 - 1973 Mercury Cougar / 1970 - 1973 Ford Mustang - 53234
Water Restrictor Plate - 351C - New ~ 1970 - 1973 Mercury Cougar / 1970 - 1973 Ford Mustang - 53234


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  • Points to Purchase:1748
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Item #: 53234
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Price: $21.85

    Reproduction 351 Cleveland Water Restriction Plate for the 1970 1971 1972 and 1973 Mercury Cougar and Ford Mustang

    New water restrictor plate for the Mercury or Ford equipped with the 351 Cleveland engine. It has been an accepted fact for decades now that the 351C bypass system was not the greatest idea Ford ever came up with. The unique 351C thermostat "hat" never seals well, causing a certain portion of coolant to just circulate through the block and never make it to the radiator. Years ago, Pantera enthusiasts (all Panteras had cooling issues from the factory BTW) found that if they soldiered a penny into the hole in their restriction plate and used a standard small block Ford thermostat, their cooling issues all but disappeared. That trick worked fine until Ford discontinued the brass restrictor plate. This aluminum unit is designed to replace the brass plate and be installed as-is. This unit must be used in conjunction with a standard thermostat , you cannot use the 351C unique thermostat with this block off plate. The tiny hole in the center is for air bleed only. Want to find out how to use a penny instead of spending $21.85? Click hear to learn more!

    On a record hot day in Evansville, In at 108 degrees the car was driven a while. She never went over 200. Im so happy with this upgrade, get the WCCC part and a 160 thermostat and your problems are cured!

    Replaces Ford Part number D0AZ-8K517-A.


    For some helpful tips on upgrading your Cougar (or Mustang) cooling system, check out our video:


    Product Reviews
    Total Customer Reviews: 21
    Overall Customer Rating:
    Reviewed On:
    8/16/2018 
    Author:
    Warren 
    Location:
    Kelowna, B.C. 

    Completely solved heat issue

    Material:
    Fit:
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    Correctness:
    My '72 XR7 has a 351C that was running way to hot for my liking. I tried all the usual fixes and upgrades with moderate results. This $20 restrictor plate did the trick, easily at least 20 degrees cooler now. I wish I had done this sooner.

    Product fit perfect, no issues at all. Total installation time was less than an hour.


    Pros:
    Cons:
    Reviewed On:
    7/16/2018 
    Author:
    DAVE 
    Location:
    BIG BEAR LAKE, CA. 

    351 C OVERHEATING

    Material:
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    AFTER TALKING TO THE GUYS AT WCCC, I PURCHASED A NEW ALUM. RADIATOR AND THE RESTRICTOR PLATE TO REPLACE THE BYPASS LOCATED UNDER THE THERMOSTAT. WHAT A DIFFERENCE! I TOOK THE COUGAR UP A LONG UPHILL MOUNTAIN ROAD AND IT NEVER WENT ABOVE A THIRD OF THE TEMP GAUGE. I HAD TO USE A PRY BAR TO REMOVE THE EXISTING BYPASS PLATE AND USED A SOCKET AND EXTENSION TO PRESS FIT THE NEW ALUM. RESTRICTOR PLATE IN.NOW THE ENGINE STAYS NICE AND COOL.

    Pros:
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    Reviewed On:
    3/10/2017 
    Author:
    Britt 
    Location:
    minnesota 

    now have good cooling

    Material:
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    Correctness:
    I have a 1970 cougar with a 351c 4v that always ran on the hot line on the gage. I added the restrictor along with a 160 high flow stat (Windsor) and now my gage is at about the 25% make on the gage wow what a change thanks wccc.

    Pros:
    • quick and easy
    Cons:
    Reviewed On:
    12/3/2016 
    Author:
    Marc 
    Location:
    Kansas 

    A real problem solver!

    Material:
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    I've owned a 1971 Mach 1 Mustang 351C 4V for 20 years now and have dealt with overheating and high temps that long. The water restrictor plate seems to have taken care of the high temps. Even after shutting the engine down to heat soak it cools readily when restarted. The restrictor plate it a little tricky to install but if time is taken, it fits like the original part. If you are driving a 351C powered Ford I highly recommend this part! Thanks West Coast Classic Cougar!

    Pros:
    • price
    • easy installation
    Cons:
    Reviewed On:
    9/24/2016 
    Author:
    racheliane 
    Location:
    France 

    perfect item

    Material:
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    Installed on my De Tomaso Longchamp, 351C. Easy to install. Cooling works properly know, with correct heat regulation.

    Pros:
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