Engine/Motor Mount Trouble

[Meli]

I've been driving a 2007 Suburban, currently with around 180k miles, for almost 3 years. In the last 18 months, I've replaced engine/motor mounts twice. I just tested and have another cracked mount. Help!!! This $500 repair is not acceptable to continue to occur, not routine maintenance! This never happened with my 2002 Suburban. Is there a recall I cannot find?

Frustrated, to say the least! I read that Jennifer from GM was assisting some with this in 2014. Is there anyone currently assisting with this?

 

[iamdub]

I've been driving a 2007 Suburban, currently with around 180k miles, for almost 3 years. In the last 18 months, I've replaced engine/motor mounts twice. I just tested and have another cracked mount. Help!!! This $500 repair is not acceptable to continue to occur, not routine maintenance! This never happened with my 2002 Suburban. Is there a recall I cannot find?

Frustrated, to say the least! I read that Jennifer from GM was assisting some with this in 2014. Is there anyone currently assisting with this?

About the only assistance with resolving this is people making/trying to make their own mounts, myself included. I have some ideas of how I want to do mine and I have a few used/broken mounts to experiment with. But, I have bigger priorities this time of year. Otherwise, all you can do is replace it with another mount that will likely continue the cycle.

 

[Meli]

I've read some information on the aftermarket mounts made by Anchor. Do you know if they last longer than the GM mount?

 

[iamdub]

I've read some information on the aftermarket mounts made by Anchor. Do you know if they last longer than the GM mount?

Most I've read is the aftermarket mounts are worse than the OEM mounts. Do you have a heavy right foot? Do you tow?

 

[Meli]

No to both. It's a child transporter & grocery getter more than anything.

 

[iamdub]

No to both. It's a child transporter & grocery getter more than anything.

I thought for sure these things were "just" sensitive to people that did off-roading, towed or was ******* the throttle. Apparently, the mounts just plain suck. If you've ever studied one, you'd wonder how they were ever an approved design. They're basically a square balloon made of thick rubber and filled with fluid. The weight of the engine rests on this layer of fluid, which makes for a great vibration absorber. When the engine torques and pulls on the mount, it is limited by a metal pin. Over time (in short time), the rubber cracks and the fluid leaks out, letting the weight of the engine collapse the mount so you now have hard rubber resting on hard rubber and an extra 1/2" or so of free play. The constant up and down motions from the extra play wears the rubber away further, so the mount eventually wallows itself more room to move and the problem worsens.

I'm trying to come up with a relatively simple and cost-effective direct-replacement mount that is based on the tried-and-true mount design of the past 50+ years. I have another idea that may be a simple and permanent solution that won't require removing the mounts. I'd like someone with a broken mount to try it, but I'll make a new thread for that one...

 

[justinesky]

I have a really heavy foot and mine has lasted a year half so far. i think i am starting to feel it go again. at least its some what easy to change. I left the metal guard off the new one to make my life easier when install and i am sure it will help for removal

 

[Meccanoble]

you mean the shiney protector tin foil looking piece? I think its to minimize dust or maybe prevent oil from spilling. I was scared to install without it.

I currently have an anchor, and one I got very cheap off amazon. Only 2-3k miles on it. Will definitely make a post when its time to change but I'm hoping its way after you are forced to make a decision on your 3rd mount. Freaking sux

 

[iamdub]

That aluminum "foil" piece is a heat shield to help protect the mount from the heat of the exhaust manifold. Heat accelerates the decay of rubber, so leaving that heat shield off likely shortened the life of the mount tremendously.

 

[NGAneer]

I've read some information on the aftermarket mounts made by Anchor. Do you know if they last longer than the GM mount?

I've had my Anchor mount for 7 months and so far so good.

 

[funymuny]

2007 Yukon SLT purchased new. Replaced the driver side engine mount a couple of months ago at about 115,000 miles. Yep, about $500. I do not tow anything to speak of, don't off-road it and don't believe I have a particularly heavy foot. Seems like it's just a wear item. It was replaced with oem mount.

 

[savagebasher]

Ok dumb question.. what are the symptoms of a failed motor mount exactly?

 

[wingdog]

I've been watching these motor mount threads for a while and I'm amazed that those of you who've had your mounts replaced especially at a dealer are still using production mounts. I work for a police vehicle fleet with almost 200 Tahoe's. GM put out a bulletin in like 2008 for a heavy duty replacement mount that does not have fluid in it. Part number 25847739. It does not show up when the parts guy looks up a mount so I can't blame them but the service dept. should have access to it. We have replaced almost every left side mount in the fleet with these and had zero failures. Police drive these things far harder than probably any of you and no failures. Just ask the parts dept. to order this number.

 

[Fless]

Remember when chain was used to prevent motor mount breakage?
https://www.autosafety.org/chevrolet-motor-mounts/

 

[Meccanoble]

I've been watching these motor mount threads for a while and I'm amazed that those of you who've had your mounts replaced especially at a dealer are still using production mounts. I work for a police vehicle fleet with almost 200 Tahoe's. GM put out a bulletin in like 2008 for a heavy duty replacement mount that does not have fluid in it. Part number 25847739. It does not show up when the parts guy looks up a mount so I can't blame them but the service dept. should have access to it. We have replaced almost every left side mount in the fleet with these and had zero failures. Police drive these things far harder than probably any of you and no failures. Just ask the parts dept. to order this number.

This is a blessing! I am looking into this!

 

[Meccanoble]

That part number is showing up as the H3 Hummer motor mount:

https://www.gmpartscenter.net/oem-parts/gm-mount-asm-eng-25847739/?c=aT1HUzA2MTUyNSZyPWxheWVyXzE=

Its fitment for a similar 5.3 V8 engine. Definitely looking for others to verify.

MOUNT ASM-ENG - GM (25847739)

• List Price:$114.23
• You Save:$38.70 (34% off)
• Sale Price:$75.53

In Stock

• Manufacturer:GM
• Part Number:25847739
• Part:Mount Asm-Eng

 

[wingdog]

Not surprised to hear that. Its just a chevy chassis and driveline.

 

[wingdog]

If you ask the counter guy to look at the engineering notes attached to that part number he will read to you that it is a recommended replacement of the hydraulic mount with a regular rubber mount for police vehicles. They are no different in mounting or fitment only durability.

 

[Rocket Man]

If that mount fits, there needs to be a whole shitload of sharing of this info because this problem has been going on for many years on all the forums and this is the first I've heard of it. Somebody please get one of these mounts and compare to one of their failed ones to see if it will fit. I don't even own one of the trucks affected and I'm all excited.

 

[Doubeleive]

I've been watching these motor mount threads for a while and I'm amazed that those of you who've had your mounts replaced especially at a dealer are still using production mounts. I work for a police vehicle fleet with almost 200 Tahoe's. GM put out a bulletin in like 2008 for a heavy duty replacement mount that does not have fluid in it. Part number 25847739. It does not show up when the parts guy looks up a mount so I can't blame them but the service dept. should have access to it. We have replaced almost every left side mount in the fleet with these and had zero failures. Police drive these things far harder than probably any of you and no failures. Just ask the parts dept. to order this number.

that part number comes up as a "right" side mount, does it also fit the left?