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Vibration in idle and reverse - Engine/Motor/Transmission mount question

4.6K views 1 reply 2 participants last post by  alpinegreenneon  
#1 ·
Engine Type
2.0
Transmission Type
6F24 automatic
Hello, I inherited a 2013 SXT with 103k miles on it somewhat recently. Right away, I noticed that there was significant vibration in idle, which seemed to get even worse in reverse. Also, going over any small bumps made a "thunk" noise. After reading posts here, I was guessing that the vibration was bad engine/transmission mounts.

I took it into a local mechanic who thought the noises going over bumps was due to bad struts, so he replaced the front strut assemblies (which only slightly seemed to help), and they agreed that the vibration might be due to at least one bad engine/transmission mount, but the bolts for the under carriage shield are corroded, so they were reluctant to take that off to verify.

From a terminology perspective, are there technically two transmission mounts (driver/passenger sides) and one engine mount (rear)? If not, what is there for mounts?

That seems to be what they're called on Mopar.com, but after reading thru numerous posts about them here, I just wanted to be sure before talking to the mechanic again. I was originally thinking I'd get them replaced with OEM parts since I only expect the car to last a few more years anyway, but am also considering the Deyeme mounts, especially since it looks like at least one of the OEM mounts may not even be available (at least on mopar.com).
 
#2 ·
The factory service manual calls all 3 engine mounts, Left, Rear, and Right. The designations are from the perspective of sitting in the drivers seat. Left is the driver side and Right is the passengers side. If you removed the belly pan, it would be obvious that two, Right and Rear are actually for the engine and the Left is for the transmission.

09 - Engine, 1.4L I4 16V Turbo / Engine Mounting / INSULATOR, Engine Mount, Left / Removal

REMOVAL


1.Raise and support the vehicle

2.Remove the belly pan (Refer to 13 - Frame and Bumpers/Under Body Protection/BELLY PAN/Removal) .

3.Lower the vehicle.

4.Remove the engine cover to prevent contact with the cowl..

5.Remove the battery and tray (Refer to 08 - Electrical/Battery System/TRAY, Battery/Removal)

6.Remove the wire harness retainer from the top of the left engine mount.

7.Support transaxle with a suitable jack.

8.Remove the coolant tube bracket bolt (1).
Image


9.Remove the three mount to transaxle bracket bolts (2).

10.Remove the two mount to frame rail bolts (3).

11.Loosen, but do not remove the bolt (2) for the trans mount (3) to strut tower (1) attachment.
Image


12.Remove the mount.


09 - Engine, 1.4L I4 16V Turbo / Engine Mounting / INSULATOR, Engine Mount, Left / Installation

INSTALLATION


1.Set the left engine mount into position.

2.Tighten the left engine mount to strut tower bolt (2) finger tight.

3.Tighten the left engine mount to transaxle bracket bolts (2) finger tight.

4.Tighten the left engine mount to frame rail bolts (3) finger tight.

5.Tighten the left engine mount to strut tower bolt (2) to the proper torque specification (50 N·m - 37 Ft. Lbs.).

6.Tighten the left engine mount to frame rail bolts (3) to the proper torque specification (87 N·m - 64 Ft. Lbs.).

7.Tighten the left engine mount to transaxle bracket bolts (2) to the proper torque specification (105 N·m - 77 Ft. Lbs.).

8.Install the coolant tube bracket bolt (1) and tighten to the proper torque specification (9 N·m - 80 In. Lbs.).

NOTE:
Failure to carry out the Engine Mount Neutralization procedure can result in unequal loading of the engine mounts and powertrain vibration.

9.Perform the Engine Mount Neutralization procedure (Refer to 09 - Engine/Engine Mounting/Standard Procedure) .

10.Install the battery tray (Refer to 08 - Electrical/Battery System/TRAY, Battery/Installation) .

11.Install the belly pan (Refer to 13 - Frame and Bumpers/Under Body Protection/BELLY PAN/Installation) .

12.Install the engine cover assembly.


09 - Engine, 1.4L I4 16V Turbo / Engine Mounting / INSULATOR, Engine Mount, Rear / Removal

REMOVAL


1.Raise and support the vehicle.

2.Remove the belly pan.

3.Remove the mount to bracket through bolt (4) and nut (2).
Image


4.Remove the mount to crossmember through bolt (1).

5.Reposition the engine forward to allow the mount to be removed from the pocket past the engine bracket (3).

NOTE: The exhaust system can remain intact. Carefully pry the engine forward enough to clear the bracket but not to overextend the exhaust hangers.

6.Remove rear mount.

09 - Engine, 1.4L I4 16V Turbo / Engine Mounting / INSULATOR, Engine Mount, Rear / Installation

INSTALLATION


1.Position the rear engine mount into the crossmember pocket.

2.Install the rear engine mount to crossmember bolt (1) into the cradle portion of the mount.

3.Position the front arm of the mount around the transaxle bracket (3) and install the rear engine mount to transaxle bracket bolt (4) and nut (2).

4.Tighten the rear engine mount to crossmember bolt (1) to the proper torque specification (105 N·m - 77 Ft. Lbs).

5.Tighten the rear engine mount to transaxle bracket bolt (4) and nut (2) to the proper torque specifications (80 N·m - 59 Ft. Lbs).

NOTE:
Failure to carry out the Engine Mount Neutralization procedure can result in unequal loading of the engine mounts and powertrain vibration.

6.Perform the Engine Mount Neutralization procedure (Refer to 09 - Engine/Engine Mounting/Standard Procedure) .

7.Install belly pan (Refer to 13 - Frame and Bumpers/Under Body Protection/BELLY PAN/Installation) .


09 - Engine, 1.4L I4 16V Turbo / Engine Mounting / INSULATOR, Engine Mount, Right / Removal

Removal


1.Remove the engine cover.

2.Remove the air cleaner assembly (Refer to 09 - Engine/Air Intake System/BODY, Air Cleaner/Removal)

3.Remove the coolant reservoir bolts and set the reservoir aside.

4.Remove the belly pan (Refer to 13 - Frame and Bumpers/Under Body Protection/BELLY PAN/Removal) .

5.Properly support the powertrain with a suitable jack or stand.

6.Remove the four mount to timing cover bracket bolts (2).
Image

7.Remove the two mount to frame bolts (1).

8.Loosen, but do not remove the mount to strut tower bolt (2).
Image

9.Remove the engine mount (3).

09 - Engine, 1.4L I4 16V Turbo / Engine Mounting / INSULATOR, Engine Mount, Right / Installation

Installation


1.Set the right engine mount (3) into position.

2.Tighten the right engine mount to strut tower bolt (2) finger tight.

3.Install right engine mount to frame rail bolts (1). Finger tighten the bolts.

4.Install the right engine mount to engine bracket bolts (2). Finger tighten the bolts.

5.Tighten the right engine mount to strut tower bolt (2) to the proper torque specification (50 N·m - 37 Ft. Lbs)

6.Tighten the right engine mount to frame rail bolts (1) to the proper torque specification (63 N·m - 46 Ft. Lbs)..

7.Tighten the right engine mount to engine bracket bolts (2) to the proper torque specification (63 N·m - 46 Ft. Lbs).

NOTE:
Failure to carry out the Engine Mount Neutralization procedure can result in unequal loading of the engine mounts and powertrain vibration.

8.Perform the Engine Mount Neutralization procedure (Refer to 09 - Engine/Engine Mounting/Standard Procedure) .

9.Install the coolant reservoir bottle and tighten the coolant reservoir bottle bolts (3) to the proper torque specification (9 N·m - 80 In. Lbs.).

10.Install the air box assembly (Refer to 09 - Engine/Air Intake System/BODY, Air Cleaner/Installation) .

11.Install the engine cover.

12.Install the belly pan (Refer to 13 - Frame and Bumpers/Under Body Protection/BELLY PAN/Installation) .

13.Start the engine and check for vibrations.


09 - Engine, 1.4L I4 16V Turbo / Engine Mounting / Standard Procedure

ENGINE MOUNT NEUTRALIZATION


1.Remove or relocate components as required to access the engine mount bolts (Refer to 09 - Engine/Engine Mounting/INSULATOR, Engine Mount/Removal) .

2.Loosen the left engine mount to transmission bracket bolts (2).

3.Loosen the left engine mount to frame rail bolts (3).

4.Loosen the bolt (2) for the left engine mount (3) to strut tower (1) attachment.

5.Remove or relocate components as required to access the engine mount bolts (Refer to 09 - Engine/Engine Mounting/INSULATOR, Engine Mount/Removal) .

6.Loosen the right engine mount to engine bracket bolts (1).

7.Loosen the right engine mount to frame rail bolts (2).

8.Loosen the bolt (2) for the right engine mount (1) to strut tower (3) attachment.

9.Raise and support the vehicle (Refer to 04 - Vehicle Quick Reference/Hoisting/Standard Procedure) .

10.Remove the belly pan (Refer to 13 - Frame and Bumpers/Under Body Protection/BELLY PAN/Removal) .

11. Loosen the rear engine mount to transmission bracket bolt (4) and nut (2).

12.Loosen the rear mount to crossmember bolt (1).

13.Center the powertrain in the engine mounts:
•Allow the powertrain to relax.
•Manually position the powertrain as close as possible to a position where the right and left engine mounts appear centered and are not skewed front-to-rear or side-to-side.
•Again, allow the powertrain to relax.

14.Tighten the rear engine mount to crossmember bolt (1) to the proper torque specification.

15.Tighten the rear engine mount to transmission bracket bolt (4) and nut (2) to the proper torque dpecification.

16.Install the belly pan (Refer to 13 - Frame and Bumpers/Under Body Protection/BELLY PAN/Installation) .

17.Lower the vehicle.

18.Tighten the right engine mount to strut tower bolt (2) to the proper torque specification.

19.Tighten the right engine mount to frame rail bolts (2) to the proper torque specification.

20.Tighten the right engine mount to engine bracket bolts (1) to the proper torque specification.

21.Tighten the left engine mount to strut tower bolt (2) to the proper torque specification.

22.Tighten the left engine mount to frame rail bolts (3) to the proper torque specification.

23.Tighten the left engine mount to transmission bracket bolts (2) to the proper torque specification.

24.Install the components removed to access the engine mount bolts (Refer to 09 - Engine/Engine Mounting/INSULATOR, Engine Mount/Installation) .
 
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