04-18-2018, 08:29 PM | #1 |
Drives: 2010 Camaro 2SS/RS Join Date: Mar 2016
Location: Indianapolis
Posts: 288
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Z28 rear upper outer bushing advice
Overhauling a large portion of the rear suspension in the next week or so and looking for some advice on changing these. I'm not planning on dropping the cradle(not upgrading subframe mounts) but will have most of the rear suspension out of the car so I should have some room in the wheel wells to move around. I know I had seen a post once about getting to these bushings but can't for the life of me find it again. Something about a long arm angled wrench if I remember correctly.
Anyway, any advice on tools or methods to get at these guys is greatly appreciated!
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491 hp/438 tq
LS3 Conversion | Comp Cam Custom Grind | Mast Heads | Comp Cam Push Rods | LS7 Timing Chain | 180 Thermostat | Ported Intake | Ported TB | SLP UDP | K & N CAI | Custom 3800 Stall Converter | Aluminum 1 Piece Driveshaft | Kooks 1 7/8" LTH | High Flow Cats | ARH 3" Exhaust | ARH Mufflers | Eibach Lowering Springs | BMR Floor Brace Subframe Connectors with Tunnel Brace | BMR Moly Lower Rear Control Arms | Oracle LED Halo Kit |
04-18-2018, 08:40 PM | #2 |
Drives: cars Join Date: May 2011
Location: Oversneeze
Posts: 4,544
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You'll still loosen the bolts to lower slightly, just keep an eye on the fuel pump harness or disconnect, takes 2 seconds. Yes you want a flex head wrench, worth their weight in gold anyways.
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04-19-2018, 12:52 PM | #3 | |
Drives: 2013 Camaro 1LE Join Date: Jul 2012
Location: Verona, WI
Posts: 1,924
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Quote:
The hardest bolt to get access too is the bolt that is installed from the rear that holds the upper control arm into the bushing. I tried swivel adapters, short extensions, deep wells, etc.... The only tool I found to work decently was just a regular combination Open end/Box end wrench that has the box end with a slight bend in it. Mine was just a regular ole Craftsman combination wrench. The angle on the box end gave me just enough clearance to swing about 1/4 turn at a time. I did have the rear sway bar removed as well since I was also changing that out. That also helped give more room to access the bolt. I also had taken the rubber exhaust hangers off on the mufflers and just under the center of the diff off so I could lower the rear exhaust down a little. I had to lower the exhaust a little to get my sway bar out easier. But I was able to get it done this way. Just be patient and it shouldn't be too bad.
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04-21-2018, 02:03 PM | #4 | |
Drives: 2010 Camaro 2SS/RS Join Date: Mar 2016
Location: Indianapolis
Posts: 288
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Quote:
Really my biggest worry is making sure I have the tools to get to the bolts, I don't want to get all of this out and not have something that can access those bushing bolts. I'm probably going to buy a long arm ratcheting set with flex heads just in case I need them, I have regular size combo and ratcheting wrenches if a shorter wrench is better. I figured if there's room to get a long wrench up there though the added leverage might be a big help.
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491 hp/438 tq
LS3 Conversion | Comp Cam Custom Grind | Mast Heads | Comp Cam Push Rods | LS7 Timing Chain | 180 Thermostat | Ported Intake | Ported TB | SLP UDP | K & N CAI | Custom 3800 Stall Converter | Aluminum 1 Piece Driveshaft | Kooks 1 7/8" LTH | High Flow Cats | ARH 3" Exhaust | ARH Mufflers | Eibach Lowering Springs | BMR Floor Brace Subframe Connectors with Tunnel Brace | BMR Moly Lower Rear Control Arms | Oracle LED Halo Kit |
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04-21-2018, 02:13 PM | #5 |
Drives: 2015 Z/22 Join Date: Aug 2015
Location: Ontario, Canada
Posts: 931
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Not sure what it takes to remove said bushing without dropping the cradle, but as mentioned, dropping the cradle an inch or two is quite easy to do even on jack stands and crawling around on the floor. I know what you mean about not having the tools when the car is half apart in the air , so if need be, don't be nervous about lowering the cradle some.
As for the exhaust hangers not seating properly, I found some soapy water sprayed all around the rubber bushing and hanger makes things easy; I removed the hangers near the tips when I lowered the cradle to do my subframe bushings, and the extra lube made things easy.
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Overkill/Self Tuned; Mace Camshafts; K&N Typhoon Cold Air Intake; Ported 80mm Throttle Body/Intake Manifolds/Manifold Spacer; Solo Performance High-Flow Cats, Cat-back Exhaust; Vitesse Motorsports Throttle Controller; Elite Engineering E2 Catch Can; BC Racing BR Coilovers; JPSS Delrin Radius Rod Bushing Inserts, Sway Bars; Pegasus Aluminum Rear Cradle Bushings, Camber/Caster Plates; Z/28 Toe Links, Trailing Arms, Upper Control Arm Bushings, Rear Shock Mounts
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04-22-2018, 01:49 PM | #6 |
Drives: 2010 Camaro 2SS/RS Join Date: Mar 2016
Location: Indianapolis
Posts: 288
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Do any of you guys know what size bolts hold the bushing in place? I've seen both 18mm and 21mm so not sure what's correct. Unfortunately I don't have anything over 19mm so if it is indeed over 19mm I'll need to buy more sizes.
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491 hp/438 tq
LS3 Conversion | Comp Cam Custom Grind | Mast Heads | Comp Cam Push Rods | LS7 Timing Chain | 180 Thermostat | Ported Intake | Ported TB | SLP UDP | K & N CAI | Custom 3800 Stall Converter | Aluminum 1 Piece Driveshaft | Kooks 1 7/8" LTH | High Flow Cats | ARH 3" Exhaust | ARH Mufflers | Eibach Lowering Springs | BMR Floor Brace Subframe Connectors with Tunnel Brace | BMR Moly Lower Rear Control Arms | Oracle LED Halo Kit |
04-22-2018, 03:10 PM | #7 | |
Drives: 2014 1SS/1LE Join Date: Nov 2015
Location: Louisville, KY
Posts: 826
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Quote:
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04-28-2018, 10:46 PM | #8 |
Drives: 2020 ZL1 1LE Join Date: Sep 2012
Location: Austin, Texas
Posts: 1,335
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21mm rear facing bolt holding arm to bushing. You can get in there with a breaker bar + socket. I used a 22mm socket which allowed some latitude without rounding off the bolt. I did this with everything bolted up tight including solid bushings (so the cradle doesn't droop any) and exhaust. Reason: I had the wheels on to time the bushings. I could only move about a 1/4 turn at a time, really tests your patience.
To install I dropped the cradle a little to access the bushing to cradle bolts.
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2020 ZL1 1LE [Moroso SC Expansion Tank, otherwise stock]
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