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Old July 15th, 2005, 10:26 AM   #1
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DIY: Improve AV6 Motor Mounts

Hard launches with FWD vehicles using performance tires and upgraded power often stress both motor and transmission mounts which cause the drivetrain movements resulting in wheelhop, loss of traction and yes loss of power.

This is a solution to take your OEM motor/tranny mounts to the next level and it only cost $5 + your labor. The benefit of this design is additional strength despite it's flexibility, thanks to a polyurethane.

Keep in mind this method won't deliver the same results as solid polyurethane inserts or complete custom mounts, however it's definitely better than your stock units even if you have a brand new set.

The stock mounts have gaps which allow the center of the mount to move up and down excessively, so by using polyurethane you can fill those gaps to restore worn out mounts, reduce unwanted motor assembly movement and deliver more power to the ground.



Premixed polyurethane can be purchased at Menards or Home Depot for $5 a tube (I chose Menards due to available black color). This sealant designed for different purpose of course , however it works with metal and rubber, so that's all we need. In addition, it withstands any weather condition and high temperature. And 1 tube is enough to fill 2 tranny and 3 motor mounts (front, side, rear).




All engine/tranny mounts should be removed prior to use the polyurethane and if unable you can lift the engine and fill them up that way (not much convenient but it works). This source is not a liquid (more like tooth paste) so no duct tape necessary to cover the other end, just use a cardboard underneath when you fill them up. Place all mounts outside and let them sit on the sun for 8 hours or so each day to harden the solution faster. You can start using mounts after 24-30 hours.

Enjoy!
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'06 GTO 4-speed AUTO (Monaro conversion)
New setup: Forged 408ci (6.7L) All-motor coming - 53Xwhp/50Xwtq
Old time 11.16@121mph . Best trap - 123.4mph


'11 BMW X5 twin-turbo
'02 J32A2 AV6 - 12.8@108.7mph (sold)

Last edited by 02AV6; October 25th, 2006 at 06:30 PM..
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Old July 15th, 2005, 10:39 AM   #2
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WOW! That's is so cool and great way to improve stockers. Much props
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Old July 15th, 2005, 10:54 AM   #3
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Whoa Yeah, looks like demand was low for Energey Suspension inserts.
But THIS looks like a PERFECT way to make mounts better and so inexpensive

ROTM people
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Old July 15th, 2005, 11:07 AM   #4
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oh thank you =]
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Old July 15th, 2005, 12:47 PM   #5
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You're welcome
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'06 GTO 4-speed AUTO (Monaro conversion)
New setup: Forged 408ci (6.7L) All-motor coming - 53Xwhp/50Xwtq
Old time 11.16@121mph . Best trap - 123.4mph


'11 BMW X5 twin-turbo
'02 J32A2 AV6 - 12.8@108.7mph (sold)
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Old July 15th, 2005, 05:17 PM   #6
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Keep in mind they're not as pretty as non available (for us) Energy Suspension inserts, however this mod is far superior than running on stockers and they get the job done. Function over show
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'06 GTO 4-speed AUTO (Monaro conversion)
New setup: Forged 408ci (6.7L) All-motor coming - 53Xwhp/50Xwtq
Old time 11.16@121mph . Best trap - 123.4mph


'11 BMW X5 twin-turbo
'02 J32A2 AV6 - 12.8@108.7mph (sold)
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Old July 15th, 2005, 06:03 PM   #7
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W00T! I think this is sticky worthy
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Old July 15th, 2005, 06:05 PM   #8
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'06 GTO 4-speed AUTO (Monaro conversion)
New setup: Forged 408ci (6.7L) All-motor coming - 53Xwhp/50Xwtq
Old time 11.16@121mph . Best trap - 123.4mph


'11 BMW X5 twin-turbo
'02 J32A2 AV6 - 12.8@108.7mph (sold)
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Old July 15th, 2005, 06:06 PM   #9
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.... those mounts look much different than mine......
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Old July 15th, 2005, 06:08 PM   #10
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Maybe '99 are different than '02. Regardless, polyurethane will work on yours
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'06 GTO 4-speed AUTO (Monaro conversion)
New setup: Forged 408ci (6.7L) All-motor coming - 53Xwhp/50Xwtq
Old time 11.16@121mph . Best trap - 123.4mph


'11 BMW X5 twin-turbo
'02 J32A2 AV6 - 12.8@108.7mph (sold)
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Old July 15th, 2005, 06:12 PM   #11
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hmm ill look into that when i can have my car out for a a few days. Maybe when I do the swap ill do that.
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Old July 16th, 2005, 10:13 AM   #12
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Very nice idea I got straps from the block to frame to stop engine rise under load. I'll be having costom solid mounts made one day.
I'm gonna try the urathane trick on the tranny mounts. Thanks!
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Old July 21st, 2005, 12:21 PM   #13
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I Want My Polyurethane Mounts By Energy Already!!!
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Old July 21st, 2005, 12:29 PM   #14
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Energy won't make it for us (low demand), that's the reason for this thread
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'06 GTO 4-speed AUTO (Monaro conversion)
New setup: Forged 408ci (6.7L) All-motor coming - 53Xwhp/50Xwtq
Old time 11.16@121mph . Best trap - 123.4mph


'11 BMW X5 twin-turbo
'02 J32A2 AV6 - 12.8@108.7mph (sold)
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Old July 21st, 2005, 01:53 PM   #15
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Quote:
Originally Posted by 02AV6
Energy won't make it for us (low demand), that's the reason for this thread
Thanks for sharing this alternative solution for repairing and beefing-up worn engine motor and transmission mounts.

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Old July 21st, 2005, 03:56 PM   #16
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Will this work if the mounts are already broken?
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Old July 21st, 2005, 05:38 PM   #17
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Metal or rubber? I would get 2 tranny and 1 side motor as new since they tend to breake first then apply polyurethane.
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'06 GTO 4-speed AUTO (Monaro conversion)
New setup: Forged 408ci (6.7L) All-motor coming - 53Xwhp/50Xwtq
Old time 11.16@121mph . Best trap - 123.4mph


'11 BMW X5 twin-turbo
'02 J32A2 AV6 - 12.8@108.7mph (sold)
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Old July 25th, 2005, 05:10 PM   #18
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what are you doing with your old sleeved block?
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Old July 25th, 2005, 05:16 PM   #19
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sold out
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Old August 1st, 2005, 12:39 AM   #20
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And here is the difference

BEFORE


AFTER
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'06 GTO 4-speed AUTO (Monaro conversion)
New setup: Forged 408ci (6.7L) All-motor coming - 53Xwhp/50Xwtq
Old time 11.16@121mph . Best trap - 123.4mph


'11 BMW X5 twin-turbo
'02 J32A2 AV6 - 12.8@108.7mph (sold)
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Old August 1st, 2005, 01:09 AM   #21
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Damn, what a difference
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Old August 1st, 2005, 07:51 PM   #22
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so do u have any rattling in the interior
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Old August 1st, 2005, 08:16 PM   #23
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nice job,btw does anyone happen to know what exactly the vacuum lines that run to the front and rear motor mounts do?
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Old August 2nd, 2005, 12:24 PM   #24
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Quote:
Originally Posted by eolife22
so do u have any rattling in the interior
Nope, and car is planted more to the ground with new mounts .
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'06 GTO 4-speed AUTO (Monaro conversion)
New setup: Forged 408ci (6.7L) All-motor coming - 53Xwhp/50Xwtq
Old time 11.16@121mph . Best trap - 123.4mph


'11 BMW X5 twin-turbo
'02 J32A2 AV6 - 12.8@108.7mph (sold)
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Old August 2nd, 2005, 12:55 PM   #25
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Kool
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Old August 2nd, 2005, 04:36 PM   #26
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in addition, you could drill a hole in the liquid filled mounts and replace the goo with the poly
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Old August 4th, 2005, 06:08 PM   #27
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its too bad i have a broken front motor mount, looks like ill be giving the new mount this treatment.......
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Old August 5th, 2005, 03:19 PM   #28
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definatly clever idea, but why am I under the impression when you do this mod, it will transfer engine vibration into the cabin rather than be absorbed by the mounts?
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Old August 6th, 2005, 02:48 AM   #29
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Quote:
Originally Posted by abram2001
definatly clever idea, but why am I under the impression when you do this mod, it will transfer engine vibration into the cabin rather than be absorbed by the mounts?
Great minds think alike .. I was thinking the same. Would this nice mod not negate electronic engine mount/etc?
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Old August 8th, 2005, 04:04 PM   #30
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Quote:
Originally Posted by abram2001
definatly clever idea, but why am I under the impression when you do this mod, it will transfer engine vibration into the cabin rather than be absorbed by the mounts?

That would be true if we had HASPORT solid polyurethane mounts with maybe minimal cabin vibration from Energey Suspension inserts. With this addition however, there is no vibration at all since they flexible but strong and plant the car well to the ground with actually observed better ride on Tein SS coilovers comparing when I ran on stock mounts. I love it
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'06 GTO 4-speed AUTO (Monaro conversion)
New setup: Forged 408ci (6.7L) All-motor coming - 53Xwhp/50Xwtq
Old time 11.16@121mph . Best trap - 123.4mph


'11 BMW X5 twin-turbo
'02 J32A2 AV6 - 12.8@108.7mph (sold)
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