Question 1

How to check and replace Engine Mounts in Four cylinder engine on Toyota Highlander?

Accepted Answer

Engine Mounts seldom require attention, but broken or deteriorated mounts should be replaced immediately to prevent damage or wear on driveline components. During the check, the engine or transaxle must be raised slightly to remove the weight from the mounts. Raise the vehicle and support it securely on jackstands, then remove the splash shields under the engine and position a jack under the engine oil pan, using a large block of wood between the jack and the oil pan to carefully raise the engine just enough to take the weight off the mounts, avoiding positioning the wood block under the oil drain plug. Inspect the mounts for cracked, hardened rubber or separation from the bushing in the center, and check for relative movement between the mount plates and the engine or frame, using 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 deterioration. Disconnect the cable from the negative battery terminal, then raise the vehicle and support it securely on jackstands if not already done, and support the engine. If several mounts need replacement, only replace one at a time and tighten them as you go. For the passenger's side engine mount, remove the nuts securing the mount to the upper and lower brackets, then remove the bolts securing the mount to the frame and raise the transaxle enough to allow removal of the mount, ensuring to loosen the mounting nuts on the other engine mounts at the subframe for clearance. Installation is the reverse of removal, using thread-locking compound on the bolts and tightening them securely. For the driver's side transaxle mount, remove the nut securing the mount to the upper and lower brackets, then remove the bolts securing the mount to the frame and raise the engine enough for removal, again ensuring to loosen the mounting nuts on the other engine mounts for clearance. Installation follows the same reverse process with thread-locking compound. For the front engine mount, remove the fastener securing the mount to the bracket, then remove the bolts securing the mount to the frame and raise the engine enough for removal, with installation being the reverse and using thread-locking compound. For the rear engine mount, remove the mount nut and slide the through bolt out of the insulator, then remove the bolts securing the mount to the frame and raise the engine enough for removal, with installation being the reverse and using thread-locking compound. Finally, in the engine compartment, remove the bolts securing the engine movement control rod and its bracket, with installation being the reverse and using thread-locking compound on the bolts.

Question 2

How to check and replace Engine Mount in 3.5L V6 engine on Toyota Sienna?

Accepted Answer

Engine mounts hardly demand service intervention most of the time; however, damaged or worn down engine mounts should be replaced as soon as possible so as not to increase the load on driveline components that may result in either damage or wear. During the check the engine has to be raised a little to put minimal weight on the mounts, so they can be heard and checked for leakage. Lift the car and support it on safe jack stands and center a jack beneath the engine oil pan and put a large wood block between the jack head and oil pan in a manner that does not place the wood block under the drain plug, then lift the engine off the hangers just enough to relieve pressure off the mounts but not the wood block. Look for cracks or hardness or delamination of the rubber type and try to see if relative movement is possible between the mount plates and the engine or frame with a large screwdriver or pry bar. If such movement is observed ensure that you lower the engine and then tighten the mount fasteners. To remove a mount, remove the cable clamp from the end of the negative terminal of the battery and elevate the car on jackstands if not already standing on them; then, raise the engine as well. Take out the bolts, lift the engine and unbolt the mount by using the engine lift or floor jack and wedging a wooden plank under the oil pan. When replacing a single mount, and constructing the equipment to be a pair of mounts only, first loosen the mount-to-engine bracket nut on the other mount to enable arranged elevation of the engine for mount extraction. Analyzing the process of installation, it is its reverse with the moment of applying the non-hardening thread locking compound on the mount bolts/nuts and check the tightened condition of the same.

Question 3

How to check and replace Engine Mount in four cylinder engine on 2005 through 2009 Toyota Tacoma?

Accepted Answer

Engine mounts seldom require attention, but broken or deteriorated mounts should be replaced immediately to prevent damage or wear on driveline components. During the check, the engine must be raised slightly to remove the weight from the mounts. Raise the vehicle and support it securely on jackstands, positioning a jack under the engine oil pan with a large wood block between the jack head and the oil pan, then carefully raise the engine just enough to take the weight off the mounts, avoiding placement of the wood block under the drain plug. Inspect the mounts for cracked, hardened rubber or separation from the metal plates, noting that the rubber may split down the center. Check for relative movement between the mount plates and the engine or frame using a large screwdriver or pry bar; if movement is noted, lower the engine and tighten the mount fasteners. Applying rubber preservative can help slow deterioration. To replace a mount, disconnect the cable from the negative battery terminal, raise the vehicle, and support it securely on jackstands if not already done, then support the engine. Remove the fasteners, raise the engine, and detach the mount for removal. Installation is the reverse of removal, using thread locking compound on the mount bolts or nuts and ensuring they are tightened securely.

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