Engine/Motor Mount Trouble

[Rocket Man]

Thats the best intel yet in this thread. Do you have a part manufacturer name on the part number you listed?

It's AC Delco- the OEM Hummer motor mount. Hummers came with solid rubber mounts instead of the stupid fluid-filled ones.

https://www.amazon.com/ACDelco-2584...F8&qid=1527013346&sr=8-1&keywords=gm+25847739

 

[wingdog]

+1 on OEM GM part number.

 

[mikeyss]

I just came across this older thread and was wondering if it's just the 5.3 that has the motor mount issue, or does it also involve the 6.2's as well?

 

[Rocket Man]

I just came across this older thread and was wondering if it's just the 5.3 that has the motor mount issue, or does it also involve the 6.2's as well?

There's more info in the main motor mount thread that's at the top of the engine and drivetrain section :https://www.tahoeyukonforum.com/threads/broken-motor-mounts.55790/

I'm pretty sure it's all the NNBS regardless of motor.

 

[petethepug]

There’s nothing wrong with fluid filled motor mounts. They’re superior in handling driveline vibrations when properly tuned to the other mounts it’s working with.

Here’s the real issue. Replacing just one of the mounts when the others are also due to be changed. The newest mounts work the hardest and isolate the brunt of the vibration. Guess what occurs when the new mount is doing all the work? Yup, you and your money get separated.

The other factor is that there was an influx of inferior Chinese parts let into the States approx 2005. There are Chinese parts made to the standard but they’re usually only from the dealer’s own stock. There’s too many parts retailers that knowingly or unknowingly selling the subpar Chinese parts as OEM. The H3 (V8) is a rare beast and it’s cool that mount has been discovered as an alternative to to the fluid filled (hydraulic) version that either works or fails, with no in between service.

Full race set ups use urethane or frick’n solid mounts engineered to deal with the stress. Welcome to the fillings fall out of your head club like Ivan “Ironman“ Stuart racing across Baja. All I’m saying is, just like suspension, brake, tire and engine components, you’ve got to use prudence and swap them out as a unit not a part.




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[Rocket Man]

There’s nothing wrong with fluid filled motor mounts. They’re superior in handling driveline vibrations when properly tuned to the other mounts it’s working with.

Here’s the real issue. Replacing just one of the mounts when the others are also due to be changed. The newest mounts work the hardest and isolate the brunt of the vibration. Guess what occurs when the new mount is doing all the work? Yup, you and your money get separated.

The other factor is that there was an influx of inferior Chinese parts let into the States approx 2005. There are Chinese parts made to the standard but they’re usually only from the dealer’s own stock. There’s too many parts retailers that knowingly or unknowingly selling the subpar Chinese parts as OEM. The H3 (V8) is a rare beast and it’s cool that mount has been discovered as an alternative to to the fluid filled (hydraulic) version that either works or fails, with no in between service.

Full race set ups use urethane or frick’n solid mounts engineered to deal with the stress. Welcome to the fillings fall out of your head club like Ivan “Ironman“ Stuart racing across Baja. All I’m saying is, just like suspension, brake, tire and engine components, you’ve got to use prudence and swap them out as a unit not a part.




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Theres plenty of people on this forum who have swapped both of them out only to have them fail again and they're a ***** to replace. The Hummer ones aren't "solid" like the race mounts which have no rubber at all. These are a known high failure rate item just like the cracked dashes. From what has been reported by the people that have swapped in the Hummer mounts, you can't really feel the difference, unlike the actual solid mounts that a member over at PT.net is selling for the pickups. There should have been a recall on the mounts and dashes. If you want to replace yours with the fluid filled ones, better just go ahead and buy 2 pairs because chances are you'll be doing it again.

 

[petethepug]

I’m the guinea pig here. I’ve got another 15k or until 140k on this service contract to report on the one hydro motor mount the stealer has replaced as a covered item.

I do stab the pedal occasionally when I’m solo driver. I’m anxious to see how this goes as I’ll eventually be on my own tab for the replacement costs.


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[Rocket Man]

I’m the guinea pig here. I’ve got another 15k or until 140k on this service contract to report on the one hydro motor mount the stealer has replaced as a covered item.

I do stab the pedal occasionally when I’m solo driver. I’m anxious to see how this goes as I’ll eventually be on my own tab for the replacement costs.


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If they only replaced one side under warranty, I assume you paid them to replace the other side since you just said they both need to be done at the same time?

 

[petethepug]

Nope, not @ $500 for parts & labor x1 one motor mount. With vehicle service contracts (S/C) you’ve got to take a bite at things like you’re eating an elephant.

Hope that helps or did I misunderstand a sarcastic comment. Sorry if I’m being too direct.

If they only replaced one side under warranty, I assume you paid them to replace the other side since you just said they both need to be done at the same time?

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[Rocket Man]

Nope, not @ $500 for parts & labor x1 one motor mount. With vehicle service contracts (S/C) you’ve got to take a bite at things like you’re eating an elephant.

Hope that helps or did I misunderstand a sarcastic comment. Sorry if I’m being too direct.







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Not trying to be sarcastic at all. But I'm still wondering why you said the problem is people replace one of these mounts when they should be replacing both but later you said you just had one replaced. I guess if you had mentioned you have a service contract that kept you from doing both it might make more sense but still you must be able to see your posts are contradicting? I'm just trying to understand your point. Sorry if it seems I was being sarcastic, I am definitely not trying to be. Anyway, I hope your mounts hold up. Guys have been trying for years to find a better mount that doesn't just fail again due to the shit design these are and finally someone who works on a fleet of these rigs found out the Hummer mount fits and doesn't break so that's where we are at now.

 

[petethepug]

No, you're spewing thread BS. In just a few seconds, everyone can read the only confusion here is what you've injected into this thread. For transparency, and to be all in, I offered up that our Service contract drove the decision to have the GM dealer replace just one motor mount on our L92. I even referred to myself as a "guinea pig" to see what happens next.

I hear you mumbling to Put my money where my mouth is concerning my recommendations to change both motor mounts simultaneously vs. route I took by changing just one. WHY DON'T YOU JUST SAY IT INSTEAD OF DANCING AROUND IT? I'd respect you more instead of conjuring up a slap fight based on the whargargle you're cooking up. I stand by what I said and backed up why I took a different path.

You only got confused and nothing made sense after you posted chicken $hit comments. It sucks you're selling a story in this thread that's not accurate. Sorry if it got confusing when someone called you out. I hope this made sense that rephrasing and redirecting forum members comments just for jollies really mucks up the forum.

No one’s offended here. When you’re called out on thread BS, stop. Apology accepted. Carrying on, adding more posts about lists, your interpretation of how the other guy feels is more rebranded BS. What happened, happened. What needed to be said, was said. No need for a mod to lay down the law. It’s finished.

Not trying to be sarcastic at all. But I'm still wondering why you said the problem is people replace one of these mounts when they should be replacing both but later you said you just had one replaced. I guess if you had mentioned you have a service contract that kept you from doing both it might make more sense but still you must be able to see your posts are contradicting? I'm just trying to understand your point. Sorry if it seems I was being sarcastic, I am definitely not trying to be. Anyway, I hope your mounts hold up. Guys have been trying for years to find a better mount that doesn't just fail again due to the shit design these are and finally someone who works on a fleet of these rigs found out the Hummer mount fits and doesn't break so that's where we are at now.

 

[Rocket Man]

No, you're spewing thread BS. In just a few seconds, everyone can read the only confusion here is what you've injected into this thread. For transparency, and to be all in, I offered up that our Service contract drove the decision to have the GM dealer replace just one motor mount on our L92. I even referred to myself as a "guinea pig" to see what happens next.

I hear you mumbling to Put my money where my mouth is concerning my recommendations to change both motor mounts simultaneously vs. route I took by changing just one. WHY DON'T YOU JUST SAY IT INSTEAD OF DANCING AROUND IT? I'd respect you more instead of conjuring up a slap fight based on the whargargle you're cooking up. I stand by what I said and backed up why I took a different path.

You only got confused and nothing made sense after you posted chicken $hit comments. It sucks you're selling a story in this thread that's not accurate. Sorry if it got confusing when someone called you out. I hope this made sense that rephrasing and redirecting forum members comments just for jollies really mucks up the forum.

Michael, I apologize if that's how I made you feel. I was just trying to figure out what you were saying. Believe me, if I want to sat something I will. I see you're new to the forum so I hope you stick around and don't get so easily offended by everything said. I'm definitely no longer confused, I see exactly what's going on.

 

[Rocket Man]

Fastest person EVER to make The List !
(those of you who know me understand what I mean)

 

[iamdub]

Da fuq did I just read?

All I know are the following facts:

1) Hydraulic mounts fail WAY more easily and sooner than "standard" mounts.

2) The H3 mounts are a viable replacement with virtually no negative side effects.

 

[randeez]

 

[Rocket Man]

Da fuq did I just read?

All I know are the following facts:

1)Hydraulic mounts fail WAY more easily and sooner than "standard" mounts.

2) The H3 mounts are a viable replacement with virtually no negative side effects.