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electric fan shroud venting using Spal rubber flaps


pitman
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Has anyone installed the  Spal 30130012  rubber flaps on their fan shroud? I am curious if they are effective---- and a little more info on custom installation. How much opening is advised behind the flap? how many rivets on each flap ?  I only have space at the bottom of the shroud--will they still work not having circulation at the top as well?

                  Thanks---hope someone has used flaps on their shroud and can answer me.

 

                                                       Pitman

 

                                  

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Pitman, one of my cars has a Spal electric fan and shroud assembly. It has two rubber flaps mounted on the bottom of the shroud. Many new cars also have rubber flaps on the shrouds. The flaps allow air to enter the engine compartment when you are moving when the fan isn't running. I can't see how it can hurt. I just measured the flaps on my shroud and they are about 4" wide by 2" high. I would back up the rubber with a thin strip of sheetmetal and use about 3 or 4 pop rivets.

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