Motor mount passenger side rusted out - 1997 Buick Riviera

There are actually four mounts. The two on the passenger side are called motor mounts. The two on the driver's side are both called transmission mounts. I've included two photos of what yours will look like. The top photo is the right side upper motor mount. before ordering inspect the upper mount for a broken bolt. The bolt in the center sometimes breaks.

Yes there would be a welsh plug in that area and it is probably rusted out.

ive done it,but you have to lift motor up and take mount off.its not fun and would have taken less time to pull it and replace them all

It should be under vehicle, passenger side, below seating area, passenger side of transmission, mounted on frame in fuel line.
If you have not changed in a few years I would first spray with oil of some type for a week or two every day as it is probably very rusted

There are a total of four mounts in the engine compartment. There is a motor mount on the passengers side of the motor underneath. There is a transmission mount on the drivers side underneath. There are two Torque-strut mounts (each sold as two pieces) between the top of the motor and the radiator shroud at the front of the engine.

3.0L Engine



Fig. Typical starter mounting on early models

1. Disconnect the negative battery cable.
2. Raise and safely support the vehicle securely on jackstands.
3. Remove the terminal nuts, washers, and electrical leads from the starter motor.
4. Remove the passenger side catalytic converter.
5. Remove the passenger side engine mount nuts, and lower the vehicle.
6. Disconnect the resonance chamber-to-throttle body ducts.
   1. Detach the electrical connector for the Mass Air Flow (MAF) and the Intake Air Temperature (IAT) sensors.
   2. Disconnect the resonance chamber air intake hose from the air cleaner housing and MAF sensor.
   3. Remove the (IAC) inlet hose and the intake plenum air inlet hoses.
   4. Detach the electrical connector from the switchover valve and the remaining vacuum connections.
7. Install the engine support fixture J28467-A with adapters J28467-450 or equivalents and raise the passenger side of the engine.

NOTE Passenger side of the engine must be raised approximately 1.5 inches (38 mm).

1. Raise and safely support the vehicle securely on jackstands.
2. Remove the engine mount from the engine mount bracket and cradle.
3. Remove the engine mount bracket bolts and reposition the bracket.
4. Remove the starter motor from the vehicle.

To install:

1. Install the starter motor to the vehicle and tighten the bolts to 44 ft. lbs. (60 Nm).
2. Position the engine mount bracket and install the bolts. Tighten to 30 ft. lbs. (40 Nm).
3. Install the engine mount to the engine mount bracket and cradle. Partially lower the vehicle.
4. Lower the engine. Have an assistant guide the engine mount into place while lowering the engine. The engine mount locator tab must engage the slot in the cradle.
5. Reinstall the resonance chamber-to-throttle body ducts.
6. Raise the vehicle.
7. Install the passenger side engine mount nuts. Tighten the upper nut to 30 ft. lbs. (40 Nm). Tighten the lower nut to 41 ft. lbs. (55 Nm).
8. Install the passenger side catalytic converter.
9. Plug in the electrical leads, install the washers, and terminal nuts to the starter motor. Tighten the battery cable terminal nut to 115 inch lbs. (13 Nm). And the solenoid terminal nut to 35 inch lbs. (4 Nm).
10. Lower the vehicle.
11. Connect the negative battery cable.

Good luck (remember rated this post).

hello. you have 5 mounts front left side, front right side, lower strut rear of engine,upper strut right side and transaxle rear left side

replace mount these are common failure item let me know if you need details as to how to replace it

It has been a long time since I've replaced one of those. From what I remember you don't have to go through pulling the heater box out. You do need to remove the glove box assembly. Look up under the passenger side of the dash. If you see the bulge of the motor/cover hanging straight down then remove the cover and the motor will be there. If you don't see that then te motor is mounted horizonally. If that is the case then the fresh air door assembly will need to be removed and it is behind that.
Here is a quick check to see if the motor is bad. Thump the bottom of the heater box by the passenger's feet. if the motor comes alive or makes noise then it is bad. Also check the fuse and make sure that it doesn't work on any speed. (the resistor would prevent operation on only one speed or more but generally not all speeds)

Not supposed to be But, Check it out anyway. Hopefully it is not a Cracked Block!!!!