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#4477777 - 08/02/17 08:46 PM Should I fill this motor mount with polyurethane?
Klutch9 Offline


Registered: 01/07/09
Posts: 2453
Loc: Rochester, MI, US, World
Our Fusion has a bad motor mount on the passenger's side. It's a hydraulic mount, and looks like this...

The OEM mount went bad in about 6 years and 70,000 miles. I am replacing it with an aftermarket Anchor branded mount. Yes, I know I'm a bad person for buying an aftermarket mount. But the OEM mount didn't last long, so the aftermarket stuff can't be that bad, and I've successfully used this brand in the past.

But what I'm really looking to do it make this replacement mount bulletproof. This is a common failure point on these cars, and I don't want to spend almost $200 on an aftermarket poly performance mount. So here's the plan... the mount in question is indeed a hydraulic mount. It has a sealed 'bladder' that limits movement, as I understand it. But if you look at the picture, there is a small air void in the top of the mount that goes down a little ways; it's bigger than it looks. I was thinking of filling this with some polyurethane (Loctite construction adhesive, about $5. Google it). I'm thinking that this could prevent the rubber portion of the mount from moving excessively and tearing prematurely, like the OEM mount did. It certainly can't hurt anything. I'm not really worried about excess vibration. I'm more concerned about the mount being solid and not flopping around like a fish out of water.
_________________________
'11 Fusion SE 2.5L - 75k miles - Havoline ProDS 5w20, FL-910s
'08 Sedona LX LWB 3.8L - 117k miles - Peak conv. 5w30, XG9999

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#4477795 - 08/02/17 09:07 PM Re: Should I fill this motor mount with polyurethane? [Re: Klutch9]
rooflessVW Offline


Registered: 12/24/11
Posts: 4027
Loc: North Carolina
3M Window-weld is the stuff you want.
_________________________
"Zed's dead baby, Zed's dead."

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#4477803 - 08/02/17 09:18 PM Re: Should I fill this motor mount with polyurethane? [Re: Klutch9]
JamesBond Offline


Registered: 12/13/06
Posts: 843
Loc: midwest
Just fill the broken factory mount. If it works, you're good, if it doesn't, install the new mount. I filled a rubber mount on my honda, I let it dry for several days. There was more vibration but not too bad, it's worked fine for years now. I used construction sealant not adhesive, the sealant is a lower durometer.

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#4477849 - 08/02/17 10:25 PM Re: Should I fill this motor mount with polyurethane? [Re: Klutch9]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4838
Loc: Houston, Texas
I know a guy that went through autozone engine mounts every 6 months and did that and I think it worked or atleast made it a couple years in between changes. He only has two foot postions when driving. On the floor and off the floor.
_________________________
2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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#4477851 - 08/02/17 10:29 PM Re: Should I fill this motor mount with polyurethane? [Re: rooflessVW]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: rooflessVW
3M Window-weld is the stuff you want.


Windshield urethane is an AMAZING glue/adhesive for many, many, many things.

1000X better than "duct tape" grin
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"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4477895 - 08/03/17 12:19 AM Re: Should I fill this motor mount with polyurethane? [Re: Klutch9]
Nick1994 Offline


Registered: 02/19/13
Posts: 10097
Loc: Phoenix, AZ
I'd fill it.

Don't bother with the aftermarket mounts, they really are that bad.
_________________________
2015 Hyundai Sonata 2.4L 79k PU 5w30 & OEM
2000 Toyota Camry 2.2L 228k M1 AFE 0w30 & Wix
1996 Jeep Cherokee 4.0L 146k M1 HM 10w40 & Fram Ultra

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#4477913 - 08/03/17 01:54 AM Re: Should I fill this motor mount with polyurethane? [Re: Klutch9]
Trav Offline


Registered: 11/20/06
Posts: 18836
Loc: MA, Mittelfranken.de
I fear you are embarking on a fools errand right from the get go with this project.
The Anchor brand is pure garbage if the original lasted 6 yrs you will be lucky to get 6 months if not weeks out of it before you feel vibration.
Filling it with poly is going to cause vibration, when its all said and done you will buy an OE mount to get another 6 years and chalk it up to a lesson learned.
_________________________
ASE L1, Master. Deutsch Meisterbrief.

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#4477917 - 08/03/17 02:13 AM Re: Should I fill this motor mount with polyurethane? [Re: Trav]
NoNameJoe Online   content


Registered: 06/03/15
Posts: 414
Loc: New York
Originally Posted By: Trav
I fear you are embarking on a fools errand right from the get go with this project.
The Anchor brand is pure garbage if the original lasted 6 yrs you will be lucky to get 6 months if not weeks out of it before you feel vibration.
Filling it with poly is going to cause vibration, when its all said and done you will buy an OE mount to get another 6 years and chalk it up to a lesson learned.


I agree about Anchor. Just put one in an Anchor brand mount a month ago, was really nice for the first few days. Now it's vibrating worse than the broken OEM one. It's vibrating so bad I can feel the vibrations when I rest my hand on the fender.

Going to put the broken OEM one back in since it's easy to do on this car and if the vibrations are less I'm just going to buy a new OEM one, lesson learned.

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#4477918 - 08/03/17 02:16 AM Re: Should I fill this motor mount with polyurethane? [Re: Trav]
GMBoy Offline


Registered: 11/22/04
Posts: 7702
Loc: Texas
Originally Posted By: Trav
I fear you are embarking on a fools errand right from the get go with this project.
The Anchor brand is pure garbage if the original lasted 6 yrs you will be lucky to get 6 months if not weeks out of it before you feel vibration.
Filling it with poly is going to cause vibration, when its all said and done you will buy an OE mount to get another 6 years and chalk it up to a lesson learned.




I agree and respect Trav's advice. Besides, if the automakers thought that sealing a mount would be a good thing - they would be doing it or somebody in the aftermarket would be selling a "problem solver" mount with that modification. You are basically starting with a turd mount anyhow with the Anchor brand so go ahead and see what happens because you will be changing it out soon anyhow. (I used Anchor before and stopped after experiencing early failures 3 times on 3 different make/model vehicles and a 4th where the mount was so poorly contructed and off center I couldn't even use it.)

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#4477924 - 08/03/17 03:31 AM Re: Should I fill this motor mount with polyurethane? [Re: Trav]
artbuc Offline


Registered: 12/02/05
Posts: 1154
Loc: West Chester, PA
Originally Posted By: Trav
I fear you are embarking on a fools errand right from the get go with this project.
The Anchor brand is pure garbage if the original lasted 6 yrs you will be lucky to get 6 months if not weeks out of it before you feel vibration.
Filling it with poly is going to cause vibration, when its all said and done you will buy an OE mount to get another 6 years and chalk it up to a lesson learned.



Agree! I filled the dog one mount on my Toyota V6 1MZFE engine with 3M Window-Weld as shown on many DIY videos. The vibration felt in the cabin rattled my teeth.


Edited by artbuc (08/03/17 03:33 AM)

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#4477930 - 08/03/17 03:57 AM Re: Should I fill this motor mount with polyurethane? [Re: Klutch9]
Lubener Offline


Registered: 01/22/11
Posts: 2576
Loc: N.Ohio
Filling it = more vibrations.
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The "thinking" man's friend.

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#4477934 - 08/03/17 04:31 AM Re: Should I fill this motor mount with polyurethane? [Re: Klutch9]
demarpaint Offline


Registered: 07/03/05
Posts: 29741
Loc: NY
I'd go OE, and not fill or tamper with it. I'd be willing to bet it will outlast the aftermarket mount by several years.
_________________________
God Bless Our Troops


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#4477963 - 08/03/17 06:57 AM Re: Should I fill this motor mount with polyurethane? [Re: Klutch9]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Hydraulic engine mounts are a BandAid covering up an engine with the jitters from other problems. These new cars are supposed to run like a Swiss watch even with solid steel mounts.

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#4477964 - 08/03/17 06:59 AM Re: Should I fill this motor mount with polyurethane? [Re: Klutch9]
quint Offline


Registered: 12/14/09
Posts: 370
Loc: Cincinnati
I have two Anchor mounts in my Corolla and so far they have held up for several years with very little vibration. I knew their reputation before I bought them but I wasnt about to spend $200 for mounts in a 300,000+ mile Corolla. But so far, so good.....From all the negative press on forums I'm sure I'm in the very small minority with them actually doing ok.

Before I got the Anchors I originally filled the worn out factory mounts and that was a lesson in what not to do, the vibration was horrific at best. I don't know why filling mounts gets recommended the way it does on so many forums. Their wasn't a single piece on the car that didn't vibrate horribly with filled mounts. Never again.

Go OEM, the people who work on cars every day know from experience what they are talking about.
_________________________
1993 240sx convertible
2001 Sequoia
2012 Mazda 2
2012 Mazda 3 Totaled 3/16/18, R.I.P
2017 Mazda 3
2017 Kia Rio

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#4478020 - 08/03/17 08:31 AM Re: Should I fill this motor mount with polyurethane? [Re: Klutch9]
SF0059 Offline


Registered: 08/06/12
Posts: 789
Loc: Lynchburg, VA, USA
It is a common "performance upgrade" to install solid polyurethane mounts. However, the NVH tradeoff is drastic. I don't think you experience filling OEM style mounts will be much different. So the question is, are you willing to trade NVH for a solid mount or are you willing to replace the OEM again in 6 years?
_________________________
2014 Honda Odyssey EX-L/RES: 54K mi, M1 0w-40 & FU, VCMuzzler V2
2017 Mazda 6 Touring 6MT: 22k mi, M1 AFE 0w20, OEM Filter

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