Genuine Toyota Avalon Engine Mount

Toyota Avalon Engine Mount Parts Questions & Answers

• Bracket, Engine Mounting, Front
  12311-0P020
  Q: What is the purpose and operation of the Active Control Engine Mount and Diverter Valve?

  A: The Active Control Engine Mount is a component that generates vibrations to cancel out engine vibration and reduce noise at idle. It operates using a Diverter Valve that utilizes engine vacuum to vibrate a diaphragm within the mount. This vibration is then transferred to a liquid inside the mount, which in turn transfers the vibration to the mount's rubber pad, effectively canceling out the engine vibration. To replace the VSV, the two vacuum hoses and the large hose connected to it must be disconnected and labeled for proper reassembly. The valve's mounting bolt and electrical connector are then removed, followed by the disconnection of the remaining hose. The installation process is the reverse of the removal steps.
• Bracket, Engine Mounting, RH
  12315-0A010
  Q: How to replace engine mounts on V4 engine?

  A: Engine mounts seldom require attention, but broken or deteriorated mounts should be replaced immediately to prevent damage or wear on the driveline components. During the check, the engine must be raised slightly to remove the weight from the mounts. Raise the vehicle and securely support it on jackstands. Then, position a jack under the engine oil pan. Place a large block of wood between the jack head and the oil pan, and carefully raise the engine just enough to take the weight off the mounts. Do not position the wood block under the drain plug. Check the mounts to see if the rubber is cracked, hardened, or separated from the metal plates. Sometimes, the rubber will split right down the center. Check for relative movement between the mount plates and the engine or frame. Use a large screwdriver or pry bar to attempt to move the mounts. If movement is noted, lower the engine and tighten the mount fasteners. Apply rubber preservative to the mounts to slow down deterioration. Disconnect the negative battery cable from the battery. Then, raise the vehicle and securely support it on jackstands if not already done. Support the engine. To remove the right engine mount, remove the nut and withdraw the through-bolt from the frame bracket. Remove the mount-to-bracket nuts and detach the mount. To remove the rear engine mount, pull the rubber plugs from the chassis to access the three nuts. To remove the front engine mount, remove the nut holding the insulator to the engine bracket, then remove the three bolts holding the insulator to the chassis. Installation is the reverse of removal. Use thread locking compound on the mount bolts/nuts and be sure to tighten them securely. For transaxle mount replacement, follow the same procedure.
• Stay, Engine Mounting RH
  12331-0P020
  Q: How to check and replace engine mounts on V6 engine?

  A: To inspect the engine mounts, lift the vehicle onto jack stands and place a jack under the engine Oil Pan. Also, raise the engine slightly to check the mounts for cracked or hardened rubber, or movement between the mount plates and engine. For replacement, remove the mount-to-engine bracket nut from the other mount. Install the new mount with a non-hardening thread locking compound on the bolts and nuts.
• Insulator, Engine Mounting, Front
  12361-0A030
  Q: What are the differences in the V6 engine mounts and their replacement procedures?

  A: The V6 engine mounts are slightly different but don't significantly alter the check and replacement procedures. The engine movement control rod assembly has two stays, removed by taking out two through-bolts and the control rod. V6 models have a shock absorbing mount, removed by taking out the through-bolt, nut and bushing. The rear mount differs as the bracket cradles the insulator, removed by taking out the through-bolt, raising the engine, and removing the nuts and insulator.