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Old 12-26-2016, 08:49 AM   #1
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Engine Cover Insulation Failing

On my 2002 Diplomat, the insulation for the engine compartment has fallen off. The blanket is in good shape, and one piece, but is now just lying on top of the engine. Has anyone else had this problem? If so, what did you do about it, or how did you re-attach it?
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Old 12-26-2016, 08:59 AM   #2
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Yes. 3M makes a spray adhesive that is high heat rated. Hard to find. End up getting at a comercial supply house (Grangers) and not cheap. $30 a can if I remember. Working from the access hatches and engine bay was a PITA, especially with the fumes. It worked in most areas. Still had one piece fall again. Good luck.
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Old 12-26-2016, 09:45 AM   #3
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Another option is to replace it with a product called "Dynamat". Google it, it is available from many places. It will give you better heat and sound deflection then the factory insulation. It is also very easy to install... peel and stick.
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Old 12-27-2016, 03:29 AM   #4
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I used a layer of Dynamat that is peel and stick.
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Then re installed the factory insulation with 3m spay adhesive and original factory metal strips screwed to cover. Dynamat also has a hood liner product if you can not use the original material.
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The engine cover was fairly easy to do. Removed from coach and worked on saw horses in garage. Also insulated the underside of the cockpit floor (engine side). This was not easy and took a few days to accomplish.
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Old 12-27-2016, 06:54 AM   #5
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OK, well clearly others have had this problem. Thanks for the suggestions. I will try to follow this advice and re-attach the insulation, or replace it.
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Old 12-27-2016, 04:00 PM   #6
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Your insulation is probably ok, but needs to be put back in place. I have heard that the spray adhesive does not last and it will fall again. (Just what others have said) When mine came down on our 2013, I cut sheets of galvanized sheet metal from Lowes to fit the different areas and took them to my dealer who fastened them up with screws holding the original insulation in place for good. I bought the Hushmat, but after seeing it, I elected to put the original back up. It didn't appear that it could insulate as well as the inch of original product. Several others have done the same thing at the factory.
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