Cadillac Seville STS Problem Report
Cadillac Seville STS Coolant Leaks From Water Pump and Radiator
The water pump and/or the plastic side tanks on the radiator may leak causing a loss of coolant. The engine may overheat due to coolant loss. Continued coolant loss after external leaks have been repaired could indicate a blown head gasket.
I have 99 sts cadillac. Haven't had too many problems. had everything check out about a year ago when i first our cased the car. Just recently i pulled my car out to find some leakage on the ground. Shortly after i noticed that my car started to over heat. I put in antifreeze and it helped for a few hours and now its back to over heating. - Visitor
water is coming out of the radiator. water pump is fine - dj123
First we noticed excessive oil consumption, then the radiator exploded then it started to over heat after radiator repair ,then loss of coolant, checked and found that head gasket was blown. Diagnosis:REPLACE ENGINE Not fixed yet need to know if recalled please help - Pastor Pat
repalce water pump housing gasket - Visitor
bought the car assumimg it had a computer problem and come to fine that the car has a few problems dash was displaying low coolant, car overheating and drove the car for a week and now the mechanic is saying that the engine seals were blown and are banging out my warranty to rebuild my engine. do you think i'll have more trouble than i bargained for cause im feeling dooped. - curious_caddy
After replacing the belt, the resorvoir started leaking the coolant. After a short drive, drops all the coolant like it has a hole. - Lord777
engine running overheating water pump and thermostat just replaced*** - avharris3
Coolant all over engine on passenger side. Front of engine is dry (where the belts are). I can't really see where the coolant originates from, as there is to much in the way (obstructed view). Not really sure how to track down what to repair/replace. - b.martonick
Bought the car new and have had minimal problems. Still has the original water pump. I've had two coolant leaks. Was fortunate to have both of them at home. Both were identical problems. The upper coolant hose clamp is a "squeeze" type metal clamp (a special tool makes it easy to remove but you can use channel locks). It rusted at the bottom, broke and thus under coolant pressure, we had a leak. A simple installation of a stainless steel screw clamp was the fix (replaced lost coolant). Several years later, same identical problem at the other end of those connection. Replaced broken steel clamp with screw clamp. Problem solved. This spring I am replacing all the rubber hoses (including heaters) and these metal clamps with stainless screw clamps. If you bring this into the garage for a repair only and honest, reputable dealer would change out the clamp (Labor and clamp probably less than 25 bucks). The skies the limit otherwise. I trust the dealers even less! - joeNH
Year ago replaced my water pump. Only went back and forth to work for the year (50 miles a day), but did one small trip (400 miles total)where I experience car message Check coolant level and than overheating, refilled reservior and went on my way. Now about to go on second long trip when experience the same issue (check coolant level car overheating, drove 134 miles and back same miles with coolant top off. Took into shop and was told water pump is leaking and the radiator was shooting out coolant at the top on the passenger side of the radiator. Shop (non cadillac shop,Goodyear)says they'll replace the water pump again (part will be free, $200 labor) and they will replace the radiator ($250 for the radiator and $300 labor). - Visitor
changed water pump AND hoses - adamofwarmfield
Water pump gasket leaked very slowly. Replaced water pump gasket and has been fine for years. - Visitor
smell coolant and area near pass side front seems damp with coolant... - Visitor
I have a coolant leak that is behind my passenger side front wheel area, I have replaced the wa...
CAR LEAKS 2 GALLONS OF COOLANT IN ONE DAY. CHANGED THERMOSTAT AND RADIATOR WAS FLUSHED. OIL DOE...
A coolant leak may develop from the water pump. This can result in an engine overheating condit...
When the car sits for a little there is a puddle of antifreeze under the car.
I have 2 1999 Cadillac STS models and both of them leak water into the trunk when it rains. Sin...