Engine mount replacement: What are your lessons learned? (1 Viewer)

[2yotanerd]

Hi all. I am about to attempt to replace my engine mounts this weekend. I am going to follow this video on YouTube ().

However, before I get started are there any lessons learned you wish you had known before you guys did your engine mounts the first time? In other words, how can I possibly screw this up? It doesn't seem too difficult but those are the famous last words

 

[HokieCruiser]

following...

 

[Malleus]

Don't forget the rear one.

 

[excessive]

Its not too bad of a job, if you have an engine hoist, the job is way easier, because you can just pull it straight up. Just keep a close eye on your radiator/fan shroud when lifting to make sure you're not damaging it

 

[2yotanerd]

Don't forget the rear one.

Do you mean the transmission mount?

 

[Malleus]

Yes

 

[OwnerCS]

Good video.

1) He makes a point about loosening the fan shroud before starting.
2) This is where you may break some brittle heater Ts. One of mine snapped from pressure when I lifted the engine. I call that a lucky break.
3) When removing the mount on a vehicle with AHC lines having a fine tooth flex head rachet makes big difference in a tight area with limited movement range. I bought a 100 tooth ratchet that has been a huge help when removing bolts in tight places.

 

[Patassa]

Hard to fit a torque wrench in there. Pretty sure I just gave it a few ugga duggas instead with a box wrench.

 

[Mike NXP]

Best advice I could give would to be sure you actually need to replace them first.

Vehicle in drive, foot on brake, and a quick tap of the throttle. Have a helper standing off to the side of the vehicle with hood open to see if the movement warrants the labor / cost of replacing them.

 

[2yotanerd]

I just finish

Best advice I could give would to be sure you actually need to replace them first.

Vehicle in drive, foot on brake, and a quick tap of the throttle. Have a helper standing off to the side of the vehicle with hood open to see if the movement warrants the labor / cost of replacing them.

Thanks. I ended up replacing them over the weekend to fix a "clunk" I have. It didn't solve my clunk, but I definitely needed to replace them because the driver side engine mount was broken in two pieces!

 

[Mike NXP]

I just finish

Thanks. I ended up replacing them over the weekend to fix a "clunk" I have. It didn't solve my clunk, but I definitely needed to replace them because the driver side engine mount was broken in two pieces!

The clunk is an elusive little bugger that a lot of folks throw parts at. Glad to hear your mount sounded due for replacement anyway. How was the swap, could the average person do it in the driveway or does it require some specialty tools / skills?

Do you get the clunk when shifting between P-R-N-D? How about when floating along at cruising speed, left off the throttle, and then back on , and then *clunk* Does engaging your CDL make the clunk go away?


I've seen a lot of post on the clunk and people will throw a bunch of parts at stuff but it doesn't fix it. Most likely culprit is where your CV axle meets the wheel hub.
>> Have someone sit in the driver seat with foot on brake. Shift from Park through the gears and then get down below and *carefully* look at your axles.

Make sure your driveshaft is good and greased, including the slip joints or whatever its called. Diff bushings are probably fine but some folks rip their front diff bushings out and replace them. I did the same with zero difference. My clunk was 100% caused by the CV / hub splines

2001LC has some good videos
>>

 

[2yotanerd]

The clunk is an elusive little bugger that a lot of folks throw parts at. Glad to hear your mount sounded due for replacement anyway. How was the swap, could the average person do it in the driveway or does it require some specialty tools / skills?

Do you get the clunk when shifting between P-R-N-D? How about when floating along at cruising speed, left off the throttle, and then back on , and then *clunk* Does engaging your CDL make the clunk go away?


I've seen a lot of post on the clunk and people will throw a bunch of parts at stuff but it doesn't fix it. Most likely culprit is where your CV axle meets the wheel hub.
>> Have someone sit in the driver seat with foot on brake. Shift from Park through the gears and then get down below and *carefully* look at your axles.

Make sure your driveshaft is good and greased, including the slip joints or whatever its called. Diff bushings are probably fine but some folks rip their front diff bushings out and replace them. I did the same with zero difference. My clunk was 100% caused by the CV / hub splines

2001LC has some good videos
>>

Yes, an average joe like me can do it. I took my front wheels/tires off because I'm short and I don't have long arms. I feel like that helped a lot to really get my body and head in the tight space. Also having a swivel head on your ratchet helps a lot too. You definitely want to disconnect the fan shroud and unclip the air box. Remove the transmission mount nuts, then jack up the engine from the bell housing.

My CV axles and front diff are brand new (less than 3 weeks old) and are Toyota parts. I haven't even put 500 miles on them.

I will try your troubleshooting suggestions this week.

 

[andrewderrick]

Had the mounts replaced on my 07 today. Excited to see if it made much of a difference. Could see where the rubber was separating which after 170k is pretty reasonable.

 

[oklastmod]

Just finished this job today. Replaced the motor mounts + transmission mount my new to me 2005 LX470. Cracked the heater tee on the driver's side whilst jacking up from the bell housing. I guess that's expected after 214k miles. So yeah, replacing the heater tee's tomorrow and then back to baselining the cruiser and chasing after that elusive clunk.

 

[andrewderrick]

Had to order heater tee's for mine, noticed a little pink around them after the mounts and yesterday the one is seeping.

That said the mounts made a nice difference. A lot smoother at idle. Really wasn't fighting much as far as clunk from P R D etc (axles/flanges made that really nice) I think the rear driveshaft or the rear arms may clunk some on/off throttle but haven't messed with it.