design flaw : F20A 's air intake gets useless heat from radiator*coolant (part 2)
Intake manifold has asbestos gasket to insulate heat ( from cylinder
head ), but the 9 nuts which lock manifold onto cylinder head have no asbestos washer, so heat enters manifold via [i] these 9 nuts [ii] the exhaust gas channeled to EGR valve [iii] * channeled through manifold .[iv] manifold chamber via EAC & Fast Idle valves. http://www.autozone.com/images/cds/g...3d800cf4a6.gif Designer seemingly assumed [i] ambient air is never >20ºC ( can be seen from exhaust manifold's front & rear covers http://www.hondaautomotiveparts.com/...13sm40_d08.gif - meant to keep exhaust gas hot, unnecessary & bad in warmer climate ), & [ii] users will use * to heat their seats' spaces, so * will not be >40ºC. To further cool air intake, I use polystyrene & rubber washers to insulate chamber from these 2 valves, glued 3 heatsinks onto chamber, fitted copper wires & hoses ( with water & surfactant ) onto chamber & throttle body. Then air intake is cooler : warm- starts & hill climbing are easier, in even 27ºC ambient air, let alone in hotter weather. These 2 valves' insulations also make Fast Idle valve heat up & reduce idling rpm sooner, & save petrol during idling / coasting. I could not post here a photo of my F20A's chamber & valves, looks like this NG bans any photo. |
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