undertray mod solution for overheating problems

[My5ABaby]

On the stock radiator there is (or was) a foam piece on the bottom of it that sealed the air from going under the radiator. On my Koyo I bought insulation that goes around a window air conditioner (Wal-Mart) and expoxied it to the bottom of the radiator. Do that and get a new thermostat and you'll be fine.

I took my car to Talladega (Alabama) in July and ragged it for 30 minutes at a time and it barely budged over 1/4.

[t_g_farrell]

Yeah even the first gens have/had that foam piece between the oil cooler and
the radiator (on the SAs) so that air would be forced thru the cooler and
radiator. Plus the underpan missing on a 1stgen is a prescription for overheating.

Good work on dealing with it Jamin. Hope to see you around. B3R for sure!

I think because these cars all tend to have the openings under the bumper,
the trays and how things seal around the radiators are key. Otherwise the
air takes the easy way out and dumps out under the engine. The trays also
help create a vacuum under/behind the radiator to help pull the air thru, at
least to my untrained eye that seems to be the case for why the trays
often extend back all the way to the engine.

I'm not a 2G owner but I see a lot of similiarities all the same.

[Pete_89T2]

Originally Posted by My5ABaby

On the stock radiator there is (or was) a foam piece on the bottom of it that sealed the air from going under the radiator. On my Koyo I bought insulation that goes around a window air conditioner (Wal-Mart) and expoxied it to the bottom of the radiator. Do that and get a new thermostat and you'll be fine.

^Roger that, I did almost the same thing on my Koyo. Instead of gluing the foam strip to the Koyo with epoxy, I used a only the hook side of an industrial-grade adhesive backed velcro strip that I stuck to the bottom of the Koyo. The foam strip attaches to the velcro very securely, but you can remove it when needed for servicing. Figured that to work on the oil cooler lines, or draining coolant, it would be nice to be able to get the foam strip out of the way so it doesn't soak up any fluids.