1998 Cadillac Catera

Heater problem
1998 Cadillac Catera 6 cyl Two Wheel Drive Automatic 148000 miles

Hello I just bought a 1998 Cadillac Catera and I believe the Heater Core to be bad (smoke coming out the air vents/i hear like water leaking/bubbling from the dash/passenger floor is wet and there is a leak from around the firewall area underneath the outside I saw) How hard is it to change out the heater core, and what needs to be removed to do so? And could it be anything else wrong? Thanks Matt
October 21, 2009.

That is a heater core leak you described all the classic signs. Bummer is dash has to be removed to gain acess to air change unit.

Oct 21, 2009.