Talk Morgan Forums Morgan Sports Cars Morgan Photo Gallery Heater matrix/Air con improvement

Having seen Gambulanga's heater box air flow improvement this spurred me on to do likewise on the Aero and to insulate the 2 air con pipes that I can easily get to that wrap around the engine. I have not had chance to test yet but the bonnet seals on the neoprene foam when shut and should stop hot air getting in from the engine. With the air con pipes lagged and the aforementioned it should improve matters in the cabin.

I hadn't noticed it before but the series one heater is quite different to the later models.

Modified the top layer of Foam on the outside edge and edge nearest the engine with a softer one as the neoprene foam not allowing the bonnet to sit properly.

Took Rosie in Blue for a 6 mile spin with aircon off and on and heater on. Getting cooler air in car, air con is improved but provably needs a re-charge.

Nice one Adrian. The setup on the Aero is quite different isn't it. I have just put the LH bonnet back on my car and tomorrow will fit the catches. The foam doesnt seem to be pressing the bonnet up at all and appears to be sealing ok.

I made the mistake of using slightly too dense foam initially, but after replacing the softer stuff its perfect. I would recommend putting heat reflective tape round it I was quite surprised hot hot it gets up there and anything to stop heat transfer it worth doing.

Look forward to seeing you car back in once piece in matching colours.

Very helpful Adrian.

I'll insulate the A/C pipes and work on making a good seal between heater box and under bonnet.

The foam used by MMC is hard enough to be self supporting so tends to push up the bonnet if made a really snug fit.

It seems to me that the bottom 60% of the gap filler could be a hard material (ash, perhaps??), with a soft foam to fill the small remaining gap: possibly "D" section rubber tube, so it fills the gap but without pushing up the bonnet.

Another thought: it might be a better idea to fix foam to the underside of the bonnet, so makeing a complete seal with the curved shape.
The underside of the seal would be a straignt flat foam edge that would then sit onto a flat hard plastic edge mounted to the top of the heater box.