Sikeston Motors sux!!
Join Date: Dec 2003
Location: Out in the boonies
Re: blowed heater core in 99 f150
well, 2 days, 36 beers later(sum beer was consumed by freinds)... the heater core is replaced!!! and yes it was a B*^#h!! and i could see where the leak was so i was happy to be sure i was replacing the right part!!...the isnstructions you gave where tha same ones i read in the chiltons...but when it comes down to it, it just took common sense. theres alot of extra lil bolts tho!!! LOL!! but now she aint heatin...I think the culprit is the thermostat, cause it can get get stuck open or shut...correct? so.....Im thinkin maybe the thermostat got stuck in the closed position, let the water get too hot, along with presure received from the water pump and blew the heater core....now its stuck open and wont heat....sound right to y'all??? by the way...i used a chiltons.......thats whay it took 2 days instead of 1......word of advice dont invest in a chiltons manual cause they suck!!