no wonder my car ran hot... Options

[stecz]

I've been having trouble with my '73 2.0 running hot... while I was under it I realized that one of the heat exchangers doesn't have the heater hose attached, so it just allows air to escape. I temporarily plugged the hole and low and behold it now doesn't run as hot (210 after 30 minutes of 80mph highway) and it cools down quickly when I slow down.


moral of the story... check the stinkin' obvious...

[Mark Henry]

how would a Heat Exchanger Heater hose help cooling? some air runs from the main pully fan through the shroud to the heat exchangers. Then out a hose to the heater flapper box. Anyone?

Most likely he also fixed the flapper boxes at the same time. If the hoses are off and it running wide open, a lot of air is escaping, thus having a major effect on cooling.

If the box is in the off position it just vents the hot air under the engine.

It does have an over pressure valve, but very little air should be coming out of it.

If the Flapper is open it vents the hot air to the cockpit. Now, Air can also run from the electric fan through hoses into the top of the exchangers and out the other hose to the cockpit. If you plugged that hose on the bottom to the flapper, wouldn't it get really hot by trapping hot air in the exchangers?

Not an issue.

When it comes to the heating system, use it or lose it, by plugging it proper.