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Old 11-03-2015, 02:41 PM   #3
flaps10
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Join Date: Jul 2014
Location: Tacoma
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The upper section is a blow molded piece of plastic and has a seam running along the low spot. Splits are common. The lower piece which attaches to the top of your engine with two fasteners is, IIRC, injection molded plastic. Better construction, thicker walls.

It can also just be the joint between the two tubes. You have to get it just right when you're wiggling the engine back up in the cavity
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