Heater core replacement

[Carlson327]

Heat is taking a long time coming...and with Chicago temps dropping to just about 20 this evening, it's making a difference. I assume I have to remove some of the dash to get at the core, but would like a more accurate picture of what has to be done. Chilton's isn't much help, and they say you have to have the AC system discharged beforehand??

I have a new heater control valvet, radiator, and of course coolant that was all replaced earlier in the year.

Thanks

[GregA]

Originally Posted by Carlson327

Heat is taking a long time coming...and with Chicago temps dropping to just about 20 this evening, it's making a difference. I assume I have to remove some of the dash to get at the core, but would like a more accurate picture of what has to be done. Chilton's isn't much help, and they say you have to have the AC system discharged beforehand??

I have a new heater control valvet, radiator, and of course coolant that was all replaced earlier in the year.

Thanks

Have you tried FLUSHING the core yet?

Take the hoses loose at the control valve & run water from a garden hose through it in BOTH directions. You might be supprised what comes out. I have done this in the past on a couple of cars with good results.

Take Care,

[fredjacksonsan]

Greg's got a great point....try the easy fix before starting a big job. Since the heat is only slow in coming (and doesn't blow only cold, as yet) the heater core is still flowing.

And while you're trying that, do your flush and fill for the cooling system if you haven't in a couple of years; the new coolant will help slow/stop any corrosion that's going on.

=edit=
Ups, just reread your original post, saw that new coolant added......

[Carlson327]

Good point. I'll try and flush it and see what happens. Thanks a lot.

[fredjacksonsan]

Originally Posted by Carlson327

Good point. I'll try and flush it and see what happens. Thanks a lot.

Good luck with it....sorry I'm not an underdash man so can't tell you diddly about that.