Trying to do a complete radiator flush and cant find drain ballcock
SOURCE: 1996 Cadillac Deville overheating- head tested, no
remove pump and check that the imèller which is plastic hasnt seperated from drive shaft
SOURCE: Flush radiator and cooling system on 1997 Calillac DeVille Concou
your radiator has a pecock on the bottom of it screw it out then you can run water through a hose behind it once it stops draining to get any residue out as far as the engine youll never truly get all of the old coolant out without tearing it down and putting it back together so flushing the radiator is just fine.
SOURCE: 1996 Cadillac Sedan Deville that overheats only when idling
The most common overheating problem with the Northstar engine is a blocked purge line(small hose).The purge line is designed to purge air out of the cooling system.
There is a small diameter hose coming from near the top of the coolant tank (not the cap) ,this is the purge line.
With the engine idling,pull the purge line from the tank,if there is no coolant flow from this small hose,it is blocked and this will cause overheating.
If the hose is clear, check for blockage at the nipple on the tank.Or trace the hose back until you find the blockage.
The hose goes in to the engine to a crossover and comes out the other side close to the thermostat housing,the blockage may be there.
SOURCE: my 2002 cadillac deville is still overheating
over heating changed thermostat cab heat quit working at the same time. What can I check next.
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