Coolant and Oil Leaks on Cadillac Catera

The Catera often experiences oil leaks from the oil cooler and/or valve cover gasket. The thermostat seal and/or the water pump may develop a coolant leak.

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Average mileage: 95,212 (10,000–171,000)
Engine affected: 3.0L V6
5 model years affected: 1997, 1998, 1999, 2000, more2001
42 people reported this problem
27 people shared problem details
1997 Cadillac Catera- 3.0L V6102,000
my car has oil in coolant reservoir but does not misfire, just took it to the mechanic to check it out.
1998 Cadillac Catera- 3.0L V6102,450
Oil comes into coolant reservoir
All at one time radiator cracked on upper drivers side,replaced with new one,oil cooler leaking and replaced with new one,heater control valve was leaking and replaced with new one,thermostat stuck shut had to replace.replaced intake gaskets etc.Now the car runs rough engine shakes and wont idle correctly.any ideas,, if you have any answers to my new problem..Also went for oil change a year ago once they lifted the car on the rack we heard sounds of something hitting the concrete,both back springs had busted and fell out so i replaced them.replaced relay that controls the radio..replace both front tie rod stabilizers.i think thats what they are called,but they are bad again after a had 4 wheel alignment and still goes thru tires fast so i have replaced all 4 of them twice in the last 3 years.. what a money pit..i think Cadillac needs to pay us to keep these cars up and running since it is their car that has so many issues..
replace heater bypass vale leaking antifreeze, replace head casket leaking oil, replace oxygen sensor bank 1...yes it happen to me too..
1998 Cadillac Catera- 3.0L V690,000
bought the car , week later, engine light came on, replaced oil cooler and antifreeze still mixed with motor, currently replacing heAD GASKETS/ what a money pit
1999 Cadillac Catera- 3.0L V689,000
oil in water coolant reservoir.
1997 Cadillac Catera- 3.0L V6113,000
oil light comes on when hot out. coolent light is always on even when its full!
2000 Cadillac Catera- 3.0L V675,000
smoke coming from both sides of the hood when car was warm.. i had the cover gaskets and oil cooler replaced for $1600...
1997 Cadillac Catera- 3.0L V695,500
oil leak's it seem that it's not circlulating cause I see a pluddle of oil inside the engine via the spark plug. then it shutting down
1998 Cadillac Catera- 3.0L V6165,000
Valve gasket needs to be replaced, leaking oil. Replaced the radiator at 100k miles becuase of leakage.
1999 Cadillac Catera- 3.0L V6
Oil keeps pushing out of valve covers flooding my spark plugs with oil. Already replaced valve cover gaskets twice, how do I fix this problem
2000 Cadillac Catera- 3.0L V632,126
Oil in the coolant. Diagnosed as oil cooler leaking by Cadillac dealership. Quoted over $3,800 to fix it. Want to replace all hoses, radiator and oil cooler, plus flush everything.
1997 Cadillac Catera- 3.0L V6
oil leak when the car is park
2000 Cadillac Catera- 3.0L V6102,000
haven't fixed yet.need to change oil cooler shop est. $1200.00
2000 Cadillac Catera- 3.0L V6
oil leak at end of canister oil leak end of oil canister
2001 Cadillac Catera- 3.0L V660,000
car starts but then dies
1999 Cadillac Catera- 3.0L V633,000
coolant leak
2001 Cadillac Catera- 3.0L V650,000
Leaking Valve covers
oil leak in 2 spots and car over heating.
1997 Cadillac Catera- 3.0L V690,100
oil leaks from valve covers after replacing them a year ago. Coolant leaks from the left side head gasket. It has leaked coolant from water pump and thermostat housing.
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