Solid motor mount question...again - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 12-30-2005, 09:51 PM   #11
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Quote:
If the mount is on the cradle and not on the body then you will not feel a difference because you still have rubber mounts to the cradle.
Yes exactly. I really don't feel a vibration now after having the solid mount for two years.
You can see the entire cradle flex slightly under load but the solid mount doesn't have any give.
My engine only moves about 1/8" now whereas before it was moving about 1".
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Old 12-30-2005, 10:57 PM   #12
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Sorry (not 100% bilingual) what is the cradle ?



Wich part of the entire mount is the cradle?

sorry to ask and thank you for the info!
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Old 12-31-2005, 01:11 AM   #13
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It'* the black rectangular box steel subframe that the engine and suspension is attached to. This drivetrain cradle is attached to the car body by rubber mounts.
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Old 12-31-2005, 11:04 AM   #14
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ok, thank you !

ill try to do it today.
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Old 12-31-2005, 11:58 AM   #15
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i dont believ that vibration would be much of an issue at all... i was under the impression that bonneville engines have a tighter balance tolerance than that for the grandprixs, due to the more luxury car standards
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Old 12-31-2005, 01:31 PM   #16
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There is no difference between the engines, internally speaking. Only difference is how they are mounted to the chassis.

I have been very interested in this for quite some time. In looking at how everyone has built their mounts, one question has cropped up in my mind... Why have the 2 neoprene/poly/whatever pucks below the motor bracket? To really effectively make a better mount, shouldn't you put a puck on either side of the top bracket, then bolt down through a spacer? This would isolate the engine completely instead of pulling against a solid bolt when under acceleration... Really, the way it has been done benefits in no way from having the 2 pucks where 1 would suffice... Correct me if I'm wrong, but the only reason for the puck in the current usage is to make for some give, but only in one direction, down...

I just think that having a puck on top and bottom of the motor bracket would provide a MUCH better vibration isolation, and pretty close to the same benefits of the current design...
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Old 12-31-2005, 04:48 PM   #17
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Quote:
I have been very interested in this for quite some time. In looking at how everyone has built their mounts, one question has cropped up in my mind... Why have the 2 neoprene/poly/whatever pucks below the motor bracket? To really effectively make a better mount, shouldn't you put a puck on either side of the top bracket, then bolt down through a spacer? This would isolate the engine completely instead of pulling against a solid bolt when under acceleration... Really, the way it has been done benefits in no way from having the 2 pucks where 1 would suffice... Correct me if I'm wrong, but the only reason for the puck in the current usage is to make for some give, but only in one direction, down...

I just think that having a puck on top and bottom of the motor bracket would provide a MUCH better vibration isolation, and pretty close to the same benefits of the current design...
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Yes you are right Kyle. Much like how body mounts work. A cushion in either direction of movement.
There were practical reasons for doing it the way we did. Availability of materials and existing design. It'* not easy to physically mount an isolating puck on the other side of the bolt, and as Blazin pointed out there are rubber subframe mounts that isolate vibration.
The little bit of vibration that does get through is hardly noticeable and it is only noticeable right after the mod. Given a couple of days of driving and experiencing the other benefits makes you forget all about it.
I don't notice it at all now. Neither does anyone else.
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Old 12-31-2005, 05:30 PM   #18
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If you do it and the little to no vibration that you get is a problem then just raise your idle a few 100 RPM and that vibration should go away.
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Old 12-31-2005, 05:36 PM   #19
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Can i just put the puck with a washer at each end without putting rubber?(old tire side)



edit: i am putting 3 puck, + 2 big washer and 2 smaller= 3 1/2 inch.

is it good enought?
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Old 12-31-2005, 05:39 PM   #20
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I think you are good to go.
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