Join Date: Dec 2012
Location: GTA, Ontario, Canada
98Sonosls is offline
Re: Header paint
I started with just painted black stainless steel headers, under hood heat was pretty high, and I melted wiring loom on a few spots, and burned a silicone spark plug boot, I also had issues with the brake line running to the passenger caliper picking up a lot of radiant heat.
I ended up having the headers thermal coated inside and out, dropped header temps 250-300 degrees. You can touch the headers a few minutes after engine shut-off now, before you needed like 45min+ before you could touch'em. The engine bay is wayyy cooler now and nearby looms and hoses are not warm at all.
I don't think I'd ever do non-thermal coated headers on a project vehicle again. It cost me as much to have the headers thermal coated as it did to buy them in the first place, but worth every penny imo.
I thought I was going to have to upgrade my rad fans (I have dual 12" spal currently) or get a cowl hood/put some louvres in, but now the hi mode barely ever comes on.