2006+ Honda Civic Forum banner

White dust/powder on underside of bonnet?

5K views 7 replies 8 participants last post by  highwoodsbeekeeper.s 
#1 ·
Hi Guys,

Not sure if this is a weird question, but the underside of my bonnet seems to have a white powder dusty residue around the outside of the material soundproofing. Anyone else have this or know what it might be? It’s a 1.6 diesel 66 plate.
 
#8 ·
I Had white deposits on underside of my Hyundai Santa Fe sound deadening material under bonnet removed white deposits with damp microcloth two orvthree times. It occurred after replacement battery fitted with vented cell caps. Previous battery codensed fumes in a sealed battery. I reckon it was hydrogen sulphate deposits from the new battery, never had it before with the original sealed battery. Obviously they didn't fit a true factory replacement at Endeavour Hyundai.
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top