warthog

Anyone ever have a leaking heater core? If so did you just have to reseal or tighten a line, or need a new heater core?
Thanks

Cherryokee

My Heater core's been making vapor for a couple months (lucky?). It was enough to fog the windshield every morning, to the point that I washed it every other day. I got so tired of my daily glycol inhaler that I finally by-passed the core last week with an adapter that's sized just right at each end. Now I'm saving the bucks to have it replaced along with the A/C Evap core - before the cold/damp Northeast November begins. I already bought replacement parts and considered the logistics of doing it myself but the deck is stacked against my doing it in a timely and painless manner.

ZINGGG

You're going to have to replace it. Whatever you do, do NOT use a stop leak product of any kind.

gone4x4

x 2, whilst yer in there,ya may wanna consider the evap core also, enjoy, make sure you seal yerseff away from family and friends for awhile, as this is NOT a pleasant job!

Radi

I've never been so lucky as to have it only be a loose clamp. It's always been a bad core.

Repair rule #50: The more difficult it is to access a part, the more likely that part has failed.

DFlintstone

Well...mine started fogging the windshield and stinking.....so many years ago I forget. I used a small tube. (three inches long and the diameter if a quarter), of that aluminum powder type stuff, that use to be called Alumaseal.

It worked with no ill effects that I'm aware of. I Have had issues running too cool, but a new 02 sensor seems to have helped that. (was too rich)..

Also used it once in a friends Volvo, it worked for at least a year I know of, still see her driving around, so I at least I know it didn't kill it!

Last spring before a flush there were STILL little sparkles in the coolant. Guess it was still "on duty!".

That stuff can settle in low flow areas like around the back, (of a Rambler) head, I suppose if a little doesn't work in a few days or a week, forget it, don't add more! It does seem it can plug up a pinhole though.