Bad motor mounts?

Hey everyone, im looking to see if the movement from my left side motormou t is normal from linked video. I'm pretty sure that movement is because the motor mount is bad. https://youtu.be/gc3Q1mbUTEk?feature=shared

 

Watching. I have yet to get a camera in action, but believe my Taco is suffering from the same issue. Gotta give it a look-over-under tomorrow.

 

Mine went bad. I think they are a shit design to begin with. Replaced with solid off road.

mine were clunking every time I stopped. I could feel the motor moving. Especially on older years that can put a hole in the frame that’s not easy to repair and wasn’t looking to experience that.

I don’t think they’re that cheap either. And for the difficulty of the job (it’s not a walk in the park) I wasn’t looking to go through all of that wrenching just to put another pair of cardboard.

 

How many miles, holmse?

 

83,000 miles. Unfortunately my truck was rear-ended in August and totaled based on damage. I do think the jolt from the impact damaged the mounts. I'd recently replaced the shocks(bad bushing), front wheel bearing (humming), brakes and rotors, drain and fill transmission, dried out ujoints, bad carrier bearing, alternator, sparkplugs. I need to record the right side next and see what that movement looks like.

 

I mean you can try OE if you want. Or other brands like Martec and see how you like it. Up to you.

just be advised it’s a bitch of a job if the truck is 4x4 with all that other parts in the way from front diff axles etc

depending on location
And popularity of solid off road
Might not be hard for you to find a truck with them go for a ride see how they feel.

if it’s not thudding/clunking when you come to a stop then it’s probably fine
For example. Worn. Switching from on gas rotating it one way, to off gas and braking, making a clunk
or rev under load and watch for movement under hood but you kinda already did that

mine didn’t vibrate it was just the thudding basically

 

Looks like normal movement to me. There is a reason they are made from rubber.

 

I've never seen a motor mount or transmission mount that needed replacement unless it had broken or unbonded the rubber between the metal mounting plates.

Put a jack under the motor and try and lift it while watching the mounts to see if they separate. If they do replace them. Short of a recent wreck or impact I doubt the mounts are bad.

Another way we used to test the mounts is to place it in drive gear engine running and hold the brake hard and rev the engine when watching look for excessive lifting then do the same on the other mount by placing it in reverse gear and reving... That should reveal a broken mount.

Did you have any symptoms or just happened to notice the slight movement?

 

Further up the page he mentions getting rear ended, so could explain it. However, do agree with you that *some* motor movement is totally normal.

 

Yeah I saw that and that is why I edited my post above. It would have to be a hell of a rear end collision (IMO) to break the motor mounts. From his video I didn't see anything excessive as far as movement goes. Revving in gear will show you for sure what is going on, or not.

 

"Some" motor mount movement, esp. on a >75K mile or more truck, is normal. The stock mounts are intentionally relatively "smooshy" to help reduce NVH & increase vehicle occupant comfort (for those who think in those terms.)

Haven't seen anyone attempt to quantitatively measure engine mount flex. I guess some ways to nerd out on that would be to rig up -- what, some kind of robust dial-indicator gauge & then take video of that under different driving & revving conditions and compare the dial readings?

A more robust but $$ approach would involve attaching purpose-specific multi-axis vibration sensors directly to engine block & graphing those over time.

 

Yeah, the movement seen in the video I'm feeling thst movement in the cab. So I'm trying to figure out why I'm feeling that movement. That's why I filmed the mount specifically. When on the road I feel it start to hop as if one of the mounts is bad. The truck tracks straight, wheel are a year old. Tires are balanced. At higher speeds 70mph. This hoping is very minimal. I'm thinking with the significant load increase at this speeds if it's the Mount it's under enough tension that it can no longer hop on the road.

 

Thanks no it's a 2wd I seem to have plenty of space to get these out when the time comes to replacing them.

 

Try what I suggested above with having someone revving the engine with it in gear ( forward and reverse ) while you watch the engine. If a mount is broke you will be able to see the engine rise up to the left or right dependent on the gear selected forward or reverse.

 

yes. Might be possible solo with hood open in seat peeking through the hood gap watching engine cover for movement - maybe

 

Alright here are some videos of the suggestions you gave to me for checking the movement. Let me know what you think on that movement. Another thing is I do fell the bouncing when I start and turn off the the engine.
https://youtu.be/DyVywQi5gDA?feature=shared
https://youtu.be/7oA6OONuAY8?feature=shared
https://youtu.be/7p_9rzXHltM?feature=shared

 

those are good videos. Looks like you brake torqued it in gear right too.

I mean I don’t know for sure. Would a new stock be better? Don’t know.
That’s the thing. Who likes stock parts. Sometimes genuine is best. Sometimes it’s bottom of the barrel. Depends on the part.

At least with mine given the age and miles condemning them was easy.
The idea behind a better one is well, they’re better. Not that I’m saying what to do. I’m not a salesman affiliated with any brand.

look at the Audi community. Mounts fail as early as 50k. I’ve replaced plenty.
Do enthusiasts like the stock ones there? No not at all. They always switch to something better.

 

Yeah i did both reverse and drive. Im still unsure if these mounts are bad. I appreciate the feedback here, ill probably stay with stock, when i get them changed, I plan on my son driving this truck in 7 yrs. so I need to keep the maintenance simple and stock who be the way to go.

 

Idk how they compare
If there’s other ones. MarTec came out with some.

not sure if stock can be modified better like adding urethane fill gaps reduce flex etc



these might even be the same price or cheaper than stock

https://martecnv.com/products/p/1gr-fe-polymounts

 

Your motor mounts are just fine. They are doing what they are designed to do: absorb the shock of the engine torque. There is very little clearance between the fan shroud and the fan blades. IF one of the mounts were broken loose, the fan would hit the shroud.

I'd bet that if you do change them with new mounts, the engine will move just as it does here with the old mounts.

I've seen many trucks that have a bounce feeling in the body and it can usually be tracked down to a defective tire or a balance issue.