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Engine Discussion of preventative/corrective maintenance and other technical issues regarding your coach's engine.

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  #11  
Old 11-05-2008
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Originally Posted by iamflagman View Post
I made the trip down to Raneys Truck parts in Ocala, FL. and Gregg the parts man matched the old rubber biscuit up with one for a Mack truck engine
I forgot to add, JUST LIKE MIKE HOHNSTEIN TOLD ME THAT IS WHAT HE USED.

You see I'm an old man with a shinny top, so I have an excuse for forgetting things
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  #12  
Old 11-05-2008
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John,

Thanks for the update,
How many motor mounts on the 3208???
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  #13  
Old 11-05-2008
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John,
How did you discover the motor mounts were broken? What were the symptoms?
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  #14  
Old 11-05-2008
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on Johns coach there are 3 mounts,one in the front,its 8'' wide and about 1.5''X1.5'' square.
shaped like a big candy bar.
the other 2 are on each side of the flywheel housing like Mike said.
we didnt remove the cat house,we removed the mounts off the flywheel housing and slipped the new biscuits in place,then replaced the mounts.
without a pit i don't think its possible to do it this way.
Glenn and I took turns cursing and busting our knuckles,we did the job in 2 days.
10 bolts,2 days.
i have been putting this job off for 2 years,i'm glad its over!
the Mack mounts are not the perfect replacement part,we had to grind down the small side to fit the hole in the frame mount,we inserted the mount and let the engine down on the rubber,the weight of that cat popped them right in.

the panhard rod was worn out too,i bet that its going to drive sweet now!
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  #15  
Old 11-06-2008
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Originally Posted by gcyeaw View Post
John,
How did you discover the motor mounts were broken? What were the symptoms?
The mount on the curb side had pieces of the rubber biscuit/isolator protruding from it, but we decided to replace both at the same time, the front mount was in good shape.

Randy got tired of me sitting in my lawn chair, arm chair supervising and would send me out on a parts run whenever he could

With all of the #!* words coming from the two of them, I never ventured down into the pit, as I may have not come back out alive
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HOPKINS, SOUTH CAROLINA
VISIT THE FINN'S INN EXPRESS REMODELING ADVENTURE AND TECH. TIPS
I'M SO SLOW ON THE HILLS,THAT I GET TO SMELL THE FLOWERS AS I GO BY.....AND WATCH THEM GROW TOO!! NOT SO MUCH ANYMORE
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  #16  
Old 08-08-2014
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For those of you who have replaced the motor mount I have a question. When replacing them does the dog house have to be removed? If the engine compartment is open will that allow enough clearance to jack up the engine for removal of the mount biscuit? Can it be done without an air gun? And finally the spec sheet for the mount calls for a 3/4 inch bolt dos that sound correct. I have to get this done this summer and by the sounds of it it could be a big task. I only have a driveway to work in.
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  #17  
Old 08-09-2014
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I am in the process of a engine swap and I replaced the rubber mounts while the engine was out. The rubber was hard to remove even with the engine out. I cut the bottom off and had to pry the top part out. This would be very difficult to do with the engine and trans in place. The bolts came out fairly easy without air tools. The engine would need to be lifted about 4 inches minimum . The new mounts fit very tight , I used dish soap and a big hammer to seat them. My old mounts were in better shape than I expected and could of used them again if I had to. In your case I would not try to replace them unless they are completely shot .
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  #18  
Old 08-09-2014
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Tom, unfortunately one of the mounts is completely shot. Do you think that if you cut the bottom and the top part it would come any easier? Or would it be best to pry it out? How long do you think it would take to get them out? Was considering taking it to a shop but was afraid it would take so long the job would get to expensive paying a diesel mechanic hourly wage.
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  #19  
Old 08-09-2014
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Originally Posted by rjtoles View Post
For those of you who have replaced the motor mount I have a question. When replacing them does the dog house have to be removed? If the engine compartment is open will that allow enough clearance to jack up the engine for removal of the mount biscuit? Can it be done without an air gun? And finally the spec sheet for the mount calls for a 3/4 inch bolt dos that sound correct. I have to get this done this summer and by the sounds of it it could be a big task. I only have a driveway to work in.
reread post #14
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  #20  
Old 08-09-2014
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Ron,
It will be easier to remove the dog house. Cutting them was difficult also , they have a metal sleeve through the center. hopefully they are so deteriorated they will come out easy. Jacking the engine up high enough May require the radiator to be open and some other issues . Maybe it would be easier to Jack the engine up a inch or two and unbolt the part from the engine then drop the mount in and put the piece back on the engine. There are only 4 bolts holding it to the engine. Just do one side at a time. It may be worth paying a mechanic for this one.
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