DIY: Filling the RX-8 engine (motor) mounts with urethane
02-24-2011, 01:16 PM
#1
DIY: Filling the RX-8 engine (motor) mounts with urethane
not a traditional DIY, but it is detailed in this thread:
https://www.rx8club.com/series-i-tech-garage-22/collapsed-motor-mount-vibration-82126/
just making it easier to find
if you don't want to read the entire thread here are the important post links that will pretty much spell it out for you:
https://www.rx8club.com/showpost.php...8&postcount=12
https://www.rx8club.com/showpost.php...3&postcount=35 (updated 12/26/11)
https://www.rx8club.com/showpost.php...5&postcount=37 (updated 12/26/11)
There are other threads on R&Ring the engine mounts from the chassis
not too difficult, best wishes
.
https://www.rx8club.com/series-i-tech-garage-22/collapsed-motor-mount-vibration-82126/
just making it easier to find
if you don't want to read the entire thread here are the important post links that will pretty much spell it out for you:
https://www.rx8club.com/showpost.php...8&postcount=12
https://www.rx8club.com/showpost.php...3&postcount=35 (updated 12/26/11)
https://www.rx8club.com/showpost.php...5&postcount=37 (updated 12/26/11)
There are other threads on R&Ring the engine mounts from the chassis
not too difficult, best wishes
.
Last edited by TeamRX8; 12-27-2011 at 02:17 AM.
02-27-2011, 07:54 PM
#3
I HATE SPEEDBUMPS!
Mines shaking a little bit. I might need new motor mounts in the near future. Filling it with urethane will stop the shaking? If it is, i might need it soon.
03-12-2011, 07:33 AM
#7
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Did you notice any significant differences between the stock mounts (While they were still good) and the urethane filled mounts? My main concern was that filling every nook and cranny would have made the mounts too hard which may essentially cause the same issue. Mine are gone too. I will have to fix the mounts also.
04-01-2011, 11:50 AM
#9
1 lbs of Shore 60A from McMaster-Carr is #8644K24 (use for street)
Shore 80A is #8644K11 (use for high performance/race)
the factory engine mounts have motion limiters that interact with the engine mount brackets. If the mount moves around too much, like when they are worn out or torn open, the engine is bouncing around on the motion limiters and causing a lot of the ruckus.
.
Shore 80A is #8644K11 (use for high performance/race)
the factory engine mounts have motion limiters that interact with the engine mount brackets. If the mount moves around too much, like when they are worn out or torn open, the engine is bouncing around on the motion limiters and causing a lot of the ruckus.
.
Last edited by TeamRX8; 04-01-2011 at 11:56 AM.
04-04-2011, 10:04 PM
#12
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1 lbs of Shore 60A from McMaster-Carr is #8644K24 (use for street)
Shore 80A is #8644K11 (use for high performance/race)
the factory engine mounts have motion limiters that interact with the engine mount brackets. If the mount moves around too much, like when they are worn out or torn open, the engine is bouncing around on the motion limiters and causing a lot of the ruckus.
.
Shore 80A is #8644K11 (use for high performance/race)
the factory engine mounts have motion limiters that interact with the engine mount brackets. If the mount moves around too much, like when they are worn out or torn open, the engine is bouncing around on the motion limiters and causing a lot of the ruckus.
.
Sorry for the flood of questions, i had been interested in purchasing an 8 for awhile but only recently was presented with an offer i couldn't refuse. Just picked up an 05 with 30,000 miles and i think right hand motor mount is cracked. I don't think motor mounts are covered under warranty, so i'm looking for an economical solution to the problem.
04-06-2011, 07:38 AM
#13
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Now thats the explanation I was looking for. GJ. I'm gonna gave to wait until mine gets back from mazda to fix the mounts.
12-26-2011, 06:49 PM
#14
recently made another set of filled engine mounts for someone else and updated the linked posts above in the first post to better illustrate and explain the process
best wishes
.
best wishes
.
Last edited by TeamRX8; 12-27-2011 at 02:17 AM.
12-30-2011, 08:53 AM
#15
to answer does the car drive differently---yes it does.
Look at some track videos that show the gearshifter and notice how much movement the shifter is doing when the chassis is under a load. Doing this to the engine mounts gets rid of a lot of that movement.
You will feel a better throttle response ( from reduced engine movement) and the trans will shift better during high perforamnce driving.
This mod is a no brainer.
And no with a shore of 60 ( say using window wield just for example) there is no nvh that I can feel.
I have been running these type mounts for over 2 years and np with them. I do it a little differently but in the end it about the same.
Good write up Mark.
Look at some track videos that show the gearshifter and notice how much movement the shifter is doing when the chassis is under a load. Doing this to the engine mounts gets rid of a lot of that movement.
You will feel a better throttle response ( from reduced engine movement) and the trans will shift better during high perforamnce driving.
This mod is a no brainer.
And no with a shore of 60 ( say using window wield just for example) there is no nvh that I can feel.
I have been running these type mounts for over 2 years and np with them. I do it a little differently but in the end it about the same.
Good write up Mark.
02-04-2012, 06:37 PM
#19
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Followed the instructions for this last week and re-installed them today. Fantastic write-up and very thorough. My passenger side was half torn open, so I used tape to seal the split until the urethane cured; the only visible difference now is a darker line at the location of the crack. I will re-evaluate the passenger mount in a couple weeks, but as of now I feel very confident in it. Thanks Team for sharing this information!
02-23-2012, 07:18 PM
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I ordered the 1 lbs of Shore 60A from McMaster-Carr and it just got here and i noticed the box was really light so i opened it up and the quart can was only like 2 fingers deep with urethane and the activator bottle was like half empty too. Is that normal? and is that enough to fill both mounts?
06-06-2012, 04:18 PM
#25
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I am running the 80A and in my opinion it is just fine for the street. My mounts were in good condition before having this done (thanks Houstonrx8er) so it wasn't a drastic change but they feel great now. Maybe a tad more NVH but nothing extreme.