An Unusual Wet Spot???

[state_vampire]

Okay, this one has me stumped. The last few times I've had my 74 Newport out, when I bring it in, there is an unusual wet spot under the transparent floor mats I laid down, but only on the passenger side and only at the front of the floor. It feels and smells like water(none of the oily qualities that anti-freeze would have). It's been dry as a bone here in Iowa and the few times it has rained, I haven't had it out. I have been crawling in, under and all around this car all week...any ideas????

 

[detmatt]

Has to be heater core but hopefully just condensation from it, you been running your heat or a.c. on the days you've noticed?

 

[commando1]

Has to be heater core but hopefully just condensation from it, you been running your heat or a.c. on the days you've noticed?

99% chance heater core

1% chance it's icing up due to faulty OPR valve or a clogged drain tube.

 

[BillGrissom]

Factory AC or after-market? Either way, it could be the condensate drain. In factory, that was a short tube thru the firewall and could be plugged or bent. Try to find it and push a wire or such carefully. That was the problem in my 69 Dart, 82 Aries, 96 Voyager, 85 Mercedes, in other words a common car problem. In some cars, there is a rubber lip that is supposed to open for water and stay shut to keep engine gases out, but they usually get stuck closed and backup the drain. If after-market AC, they ran a rubber tube to a hole in the passenger floor. It could be broke or pulled out, causing water on the floor. Could also be the heater core, but you should smell anti-freeze then, would have fogged your windshield last winter, and you probably just started using AC.