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: 97,128 (10,000–171,000)
Engine affected: 3.0L V6
5 model years affected: 1997, 1998, 1999, 2000, more2001
48 people reported this problem
33 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.
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..
1998 Cadillac Catera- 3.0L V6102,450
Oil comes into 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!
1999 Cadillac Catera- 3.0L V689,000
oil in water coolant reservoir.
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
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...
replace heater bypass vale leaking antifreeze, replace head casket leaking oil, replace oxygen sensor bank 1...yes it happen to me too..
1999 Cadillac Catera- 3.0L V680,000
Oil mixes with antifreeze. Radiator has a leak, upper drivers side. Car leaks oil. Steams from under the hood only some times. Transmission slips when going into 3rd, so I have to drive it like a manual. Driving lights/headlights refuse to go out and drains the battery. Do I keep this car or scrap it. Body and interior is in good shape and it has such low miles.
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.
2000 Cadillac Catera- 3.0L V6
oil leak at end of canister oil leak end of oil canister
1997 Cadillac Catera- 3.0L V6155,000
Replaced fan , radiator , hoses and water pump . Sometimes the needle starts going into red and other days not .
1997 Cadillac Catera- 3.0L V6
I changed valvecover gaket new and leaks oil there is a Saturn has 3.0 same motor but what car and tear
2001 Cadillac Catera- 3.0L V6
Is this problem covered by a Cadillac dealer
1997 Cadillac Catera- 3.0L V6135,000
I bought it with a Valve Cover leak
2001 Cadillac Catera- 3.0L V676,000
Engine went bad,needs a new motor
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
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