Thread: HOW TO: Solid Mounts

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  1. #1 HOW TO: Solid Mounts 
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    The stock solid mounts that are sold at stores and through vendors are a crap shoot. You have to shake them to see if they are fluid filled. Sometimes even when they say that they are solid on the box they are still fluid filled. I have also read that sometimes when they say solid that they are not solid but just don't have fluid and still have the empty cavity for the fulid making them actually worse than the fluid filled mounts.


    In my own experience I ordered and shook several mounts before I got a set of motor and trans mounts that I could not hear fluid in them. I even drilled into them to see if they were solid and guess what...fluid came out.


    At that point I decided to make my own mounts. First you have to drill them to drain the fluid out. Here is picture of where to drill (The red dots). You want to drill at a slight inward angle towards the center of the mount:


    PS- The mount on the left is a supposedly solid mount from ZZP.



    I can be tricky to get all the fluid out but if you have a smaller diameter hallow tube to jam into both ends that you drilled, it will make it easier to drain out. You want to make sure to get all the fluid out. A little fluid is ok because what you decide to fill the mounts with will push some of the residual fluid out.


    At this point you have to decide what you want to fill the mounts with. You want to look at the hardness or (Shore) rating of the filler you are going to use for the mounts. Most people that have done this have used 3M window weld which can be bought at most auto parts stores (This will be pretty close to the poly mounts sold at the vendors). You want the large tubes like this that fit into a caulk gun:


    Amazon.com: 3M 08609 Window-Weld Super Fast Urethane Black Cartridge - 10.5 fl oz.: Automotive

    Once you decide what you want to fill them with you can start by pumping the filler into one of the holes you made at the top of the mount. It can go into hard but that is the reason you have the caulk gun (Hopefully a decent one that won't just bend into a pretzel). Once you see the filler coming out the opposite side you can go to that side and fill from there. The point here is to get the mount evenly filled up.


    You also need to fill the bottom of the mount. This can be done by taping or plugging the hole shown in the picture and filling it up (from the middle) untill you seem in coming out of the other holes (on the sides) like this:





    At this point you should have the mount filled. Some people also put some of the filler on the top of the mounts like these examples:






    Once the mounts are finished they need to cure. Some people have said 2 weeks to be safe or a month to be super safe. Once cured you can install them just like any other mount.
    Last edited by Pure2sin; 09-27-2012 at 09:36 PM.
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  2. #2 Re: HOW TO: Solid Mounts 
    Mullet Member Wotgtp's Avatar
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    Very interesting, this could be a good fix for a leaking mount, or just to do on a new one. Nice write up.
    - Ed - 2000 Grand Poverty Daytona edition. Rough idle. Funny whistle. Steering issues at WOT. 3.8 SC pulley.
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  3. #3 Re: HOW TO: Solid Mounts 
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    I believe I know the answer to this but I want to see if I am right what is the main reason for doing this and NOT just putting the mount in as is?
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  4. #4 Re: HOW TO: Solid Mounts 
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    Quote Originally Posted by Logan541 View Post
    I believe I know the answer to this but I want to see if I am right what is the main reason for doing this and NOT just putting the mount in as is?
    Because the fluid mounts tend to fail a lot faster than solid mounts. Plus you have added stiffness for when motor rocks when you hit the gas and such.
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  5. #5 Re: HOW TO: Solid Mounts 
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    That's what I though (the fluid failure) i am wondering how much it affects ride (I mean I don't want the poly rattle my teeth ride) but the again if I don't want to change my mounts again for a long time I don't have much choice now do I?
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  6. #6 Re: HOW TO: Solid Mounts 
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    I been to lowes and walmart I can't find RTV where can I get it? Or what else can I use that is similar (don't want anything hard as poly)
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  7. #7 Re: HOW TO: Solid Mounts 
    GTX Level Member bps02gtp's Avatar
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    you only feel slight vibration on take off. cruzing aint bad.
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  8. #8 Re: HOW TO: Solid Mounts 
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    Found it at O'rielys RTV type 270 thanks
    \
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  9. #9 Re: HOW TO: Solid Mounts 
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    I can only find these two at Napa.. any idea which one I should choose?

    2005 GPGT- Top Swapped Click me! 15.5 @109
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  10. #10 Re: HOW TO: Solid Mounts 
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    Hard to tell from that pic.

    What you need to find is the shore or hardness rating of the product.

    You can reference that with the MSDS sheets of the RTV and 3M Window Weld.
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  11. #11 Re: HOW TO: Solid Mounts 
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    Quote Originally Posted by Pure2sin View Post
    Hard to tell from that pic.

    What you need to find is the shore or hardness rating of the product.

    You can reference that with the MSDS sheets of the RTV and 3M Window Weld.

    https://partimages.genpt.com/partimages/871577.pdf

    https://partimages.genpt.com/partimages/871580.pdf

    I was able to find the MSDS for the two in the picture. I am going to try and find the MSDS for the 3M products.
    2005 GPGT- Top Swapped Click me! 15.5 @109
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  12. #12 Re: HOW TO: Solid Mounts 
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    Slick Shiz Sin. I bet aircraft grade sealant would work great, I'll have to try it and let you know how well it works.
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  13. #13 Re: HOW TO: Solid Mounts 
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    Quote Originally Posted by acidcrashdburnd View Post
    https://partimages.genpt.com/partimages/871577.pdf

    https://partimages.genpt.com/partimages/871580.pdf

    I was able to find the MSDS for the two in the picture. I am going to try and find the MSDS for the 3M products.

    3M window weld MSDS
    http://multimedia.3m.com/mws/mediawe...=TDS_08609.pdf
    Last edited by MidnightBlue; 06-05-2012 at 03:27 PM. Reason: Fixed 3M winddow weld link
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  14. #14 Re: HOW TO: Solid Mounts 
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    Quote Originally Posted by MidnightBlue View Post
    links bad on my end but I was able to find it. Thanks!
    2005 GPGT- Top Swapped Click me! 15.5 @109
    2002 GPGT- slow and stock
    1993 Oldmobile 88
    - exploded the diff @158k
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  15. #15 Re: HOW TO: Solid Mounts 
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    Oh if anyone wants to know I am only making the dogbone mounts solid... for now
    2005 GPGT- Top Swapped Click me! 15.5 @109
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    - exploded the diff @158k
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  16. #16 Re: HOW TO: Solid Mounts 
    GXP Level Member z3r0's Avatar
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    some people just cheat

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  17. #17 Re: HOW TO: Solid Mounts 
    GTX Level Member acidcrashdburnd's Avatar
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    Quote Originally Posted by z3r0 View Post
    some people just cheat
    Where did you buy from and how much? (just the dog bones)
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  18. #18  
    GrandPrix Junkie Bluemagic's Avatar
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    Doesn't the solid poly mounts for the engine and trans mean tons of vibration?
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  19. #19 Re: HOW TO: Solid Mounts 
    GTX Level Member acidcrashdburnd's Avatar
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    Quote Originally Posted by Bluemagic View Post
    Doesn't the solid poly mounts for the engine and trans mean tons of vibration?
    if its not your DD I see no problem with that. I already have vibration from lowering, idle and during acceleration.
    2005 GPGT- Top Swapped Click me! 15.5 @109
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  20. #20 Re: HOW TO: Solid Mounts 
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    60 from zzp for the poly squares

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