Broken Motor Mounts

[kbuskill]

View attachment 241994 next weekend. AC Delco and Moog.
All new front components then alignment.

Go get 'em Rocky... lol

 

[swathdiver]

View attachment 241994 next weekend. AC Delco and Moog.
All new front components then alignment.

The control arms, which company?

 

[Kenny D]

The control arms, which company?

Lowers are AC Delco and the uppers are Moog. Tie rods are all AC Delco.

 

[swathdiver]

Lowers are AC Delco and the uppers are Moog. Tie rods are all AC Delco.

What did your research reveal with regards to how long they might last; both brands? I'm getting conflicting information.

 

[Kenny D]

What did your research reveal with regards to how long they might last; both brands? I'm getting conflicting information.

I am not sure on longevity. I just wanted to go with good quality and I hope that is what I got.

 

[ls1frc]

You guys doing mounts on 4x4 with exhaust still installed are heroe .

I am doing a DOD delete, so I did both motor mounts with the heads off. Drivers side was pretty easy but still somewha5 nnoying to get to bolts because the heat shield gets in the way.

Passenger side looked legitimately impossible if the heads were still on.

One nice thing about the hummer mounts is the small heatshield. Makes it easy to install.

 

[ls1frc]

This is one way to do the passenger side....

 

[ls1frc]

Been over 2 weeks on the new mounts...

There is zero added vibration, even with the heads/cam setup. Good call on recommending the H3 mounts!

 

[Plimbob]

Hey Kenny,

Where those replacement mounts AC Delco?

Thanks,
Tim

 

[donjetman]

I guess I'll do my driver side mount with the H3 mount.

 

[B2sdad]

So I went with the H3 mounts for both sides. I decided against the Atomic mounts. The driver side mount was trashed! And in retrospect was way easier than the passenger side to install. I also had to disassemble the mounts to remove them. which wasn't an issue since I had my impact handy, zip zip, and it was in pieces. The passenger side sucked because I had to unbolt the exhaust header and lift it up slightly to remove the old mount. The passenger mount was torn in two places, it wasn't clunking but was one the absolute verge of failure! Installed arp header bolts while I was in there just because.

 

[Plimbob]

Question -

In looking through the thread it appears that most folks jack the engine up on the oil pan where the drain plug is?

I have seen videos where folks also jacked it up by the converter- which seems like asking for problems?

Thanks for the feedback.
Tim

 

[RickSelest]

Hello All, I am getting a clunk when first accelerating, it seems very mild. Hard to tell but might be coming from the right side but not sure.

How can you tell which motor mount is broken. I have read thru some of the comments and by holding the brake and then applying the gas seems to be a method, but how does that tell you which mount is broken? Is it the direction the motor flys when accelerating?

 

[Rwayne]

Whichever side lifts. The driverside would lift in drive and the passenger in reverse. I would give it a visual inspection too. My driverside showed rust colored leaks and cracked rubber.

 

[ls1frc]

Just a quick update on my h3 mounts.

Been about 600 miles, notice zero difference or vibrations over the stock ones. Very glad I went with these.

 

[Meccanoble]

Just a quick update on my h3 mounts.

Been about 600 miles, notice zero difference or vibrations over the stock ones. Very glad I went with these.

My H3's had no vibrations and felt amazing but failed in a year (under 20k miles). I dont race nor do i have any serious performance features. I have reached my final point of frustration being on my 3rd mount in less than 90k miles. Ordered some solid mounts and will do my best to do a before and after regarding the vibration and feel.

The H3's sound different when they are worn. The regular mounts seem to be louder when they go bad. Could be how bad they were and i'm probably in the early stages of death for the H3's. They sound more like a rub.

 

[Rocket Man]

My H3's had no vibrations and felt amazing but failed in a year (under 20k miles). I dont race nor do i have any serious performance features. I have reached my final point of frustration being on my 3rd mount in less than 90k miles. Ordered some solid mounts and will do my best to do a before and after regarding the vibration and feel.

The H3's sound different when they are worn. The regular mounts seem to be louder when they go bad. Could be how bad they were and i'm probably in the early stages of death for the H3's. They sound more like a rub.

You’re the first that I’ve heard to have an H3 mount break. It doesn’t really make sense that yours failed in less time than the stock mounts usually do. Is there anything else that can be contributing?

 

[tgui]

Any pics of the H3 failures?

 

[iamdub]

My H3's had no vibrations and felt amazing but failed in a year (under 20k miles). I dont race nor do i have any serious performance features. I have reached my final point of frustration being on my 3rd mount in less than 90k miles. Ordered some solid mounts and will do my best to do a before and after regarding the vibration and feel.

The H3's sound different when they are worn. The regular mounts seem to be louder when they go bad. Could be how bad they were and i'm probably in the early stages of death for the H3's. They sound more like a rub.

Aftermarket H3 mounts or ACDelco? Mine have been holding up great and I'm not easy on it.

 

[Meccanoble]

Aftermarket H3 mounts or ACDelco? Mine have been holding up great and I'm not easy on it.

I purchased off Amazon. I kind of hope they are aftermarket now so I have a reason to get OEM but I think these are OEM. LInk below. I dont know anything that could be contributing especially since the passenger side is still fine and the H3's were fine up until a month ago when I added a pvc home depot intake (50 hp) and did a lot of testing doing WOT runs from a dig.