H.D. 10 Row Oil Cooler
Tourer
Joined: Feb 2008
Posts: 409
Likes: 2
From: Norwalk, Ohio
To force us to buy replacement parts by 20,000 miles? Planned obsolescence?
Thread Starter
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Stellar HDF Member
Joined: Mar 2006
Posts: 3,124
Likes: 255
From: From Long Island, now in So. Cal
My best guess would be manufacturing tolerances vary, so they just jam it in and crank it down, as opposed to shimming each and every mount. It shouldn't be a problem as the rubber should give a bit, but many have had failures.
Cruiser
Joined: Jul 2007
Posts: 190
Likes: 0
From: Western NY
I believe when the motor mount is preloaded that it removes some of the vibration absorbtion that the rubber mount is intended to do. The shimming was the first thing I did to mine. I did the same thing by simply jacking the motor to remove the weight and then filling the gap between the motor mount and the frame with washers.
Road Warrior
Joined: Jan 2007
Posts: 1,276
Likes: 8
From: Minneapolis Area, MN
I believe when the motor mount is preloaded that it removes some of the vibration absorbtion that the rubber mount is intended to do. The shimming was the first thing I did to mine. I did the same thing by simply jacking the motor to remove the weight and then filling the gap between the motor mount and the frame with washers.
If the front mount has the engine loading it already, then you jack the motor and put shims under the motor mount, doesn't that put more strain on the motor mount when the jack is removed?
What am I missing here...there's gotta be something.
Cruiser
Joined: Jul 2007
Posts: 190
Likes: 0
From: Western NY
I believe that when the motor mount is in place and the motor is supported there should be no space between motor mount and where it attaches to the frame. If there is a 3/16 space there and you pull the motor mount tight with the bolts you are using up some of the rubbers ability to absorb motor vibration. In otherwords it should be in a neutral state at rest.
Thread Starter
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Stellar HDF Member
Joined: Mar 2006
Posts: 3,124
Likes: 255
From: From Long Island, now in So. Cal
Not that this is the thread for this discussion, but I'm confused.
If the front mount has the engine loading it already, then you jack the motor and put shims under the motor mount, doesn't that put more strain on the motor mount when the jack is removed?
What am I missing here...there's gotta be something.
If the front mount has the engine loading it already, then you jack the motor and put shims under the motor mount, doesn't that put more strain on the motor mount when the jack is removed?
What am I missing here...there's gotta be something.
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Road Warrior
Joined: Jan 2007
Posts: 1,276
Likes: 8
From: Minneapolis Area, MN
Oh...the way I read, it sounded as if the motor was pre-loading the mount. But those last posts clarify that it's the opposite.
Is this "relaxing" of the mount done with both wheels on the ground then?
Is this "relaxing" of the mount done with both wheels on the ground then?