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2009 Pontiac G8 GT, Texas speed stage 1 cam, built valve train, built transmission, H&R Coilovers
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Discussion Starter · #1 ·
I'm currently installing poly Subframe Bushings, and I noticed something I think might be a problem. The metal insert for the front bushings doesn't come close to the end of the bushing. I've read that this insert should span the whole bushing. I'll link photos for reference. This picture is from the bottom where the washer should slot in. Do I have to make something to extend the insert? Any info appreciated, thanks.
 

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Does the other side sit flush with the surface of the bushing? Picture?
 

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2009 Pontiac G8 GT, Texas speed stage 1 cam, built valve train, built transmission, H&R Coilovers
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Discussion Starter · #3 ·
Yes it does, I can slide the insert to whichever side to make it flush, and that is the amount out gap there is. I can get a picture tomorrow.
 

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For comparison, images of BMR and SuperPro.




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Pony has posted two different styles. The black ones are the inserts. They fill the gaps in the original bushings. The purple one are complete replacement bushings. I have done the insert style on both of G8's I've had. I found they make the ft and rear suspension feel the same with no rear end wiggles on fast off ramps.
 

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2009 Pontiac G8 GT, Texas speed stage 1 cam, built valve train, built transmission, H&R Coilovers
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Discussion Starter · #6 ·
Pony has posted two different styles. The black ones are the inserts. They fill the gaps in the original bushings. The purple one are complete replacement bushings. I have done the insert style on both of G8's I've had. I found they make the ft and rear suspension feel the same with no rear end wiggles on fast off ramps.
I've noticed not many people have done the full poly bushings. I did them because I had to take the old ones out before powder coating anyway. They don't seem to sit flush on either side, so I'm not sure if I should cut an insert from an old one and extend the new one so it sits flush on both sides, or if I should just leave it. If I leave it, when torquing the bolts, wouldn't it just squish the bushing and never get tight?
 

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Make sure you have the right end facing up, and note that the bottom washers have a cup or top hat shape to them. And I think some or all of the bolt locations on the bottom of the car body have standoffs that would suit a recess in the bushing.


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2009 Pontiac G8 GT, Texas speed stage 1 cam, built valve train, built transmission, H&R Coilovers
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Discussion Starter · #8 ·
Thanks for the replies, I do have them installed correctly, I just installed the upper control arm poly bushings and they are also short, I have to believe this is normal since these also are like that.
 

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Don't have the old bushings to compare?
 

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2009 Pontiac G8 GT, Texas speed stage 1 cam, built valve train, built transmission, H&R Coilovers
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Discussion Starter · #11 ·
Update, I had them installed wrong. The way they were packaged was decieving, I had both bottoms in the back, and both tops in the front. All good now.
 

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Good deal you were able to sort it out.
 
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