05-12-2021, 07:40 PM | #1 |
Trunnions Failing
So today with my valve covers off, I noticed that some of my rockers appeared to be sitting oddly. Any ideas? Appears trunnions are going bad. These are BTR trunnion upgrades with dual platinum valve springs (BTR).
Just want to know why this happens? Installation error? Bad Trunnions? Weak Springs? Thanks in advance. https://ibb.co/MRWc9W0 https://ibb.co/dbgTBnM https://ibb.co/zSC9bZ4
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2010 Inferno Orange Metallic 2SS/RS - 6 Speed Manual
-BTR Stage 4 Cam, ID850 Injectors, E-85 Tuned, Corsa Xtreme Exhaust , Kooks 1 7/8 Headers, Melling Performance Oil Pump, ATI Super Damper, BMR Suspension: Sway Bars, Trailing Arms, 1” Lowering Springs, Differential Bushings, Rx Ported and Polished Throttle Body, VIS Racing Carbon Fiber Hood, Custom Painted - Body Kit, Entire Vehicle, ZL1 Addons Wicker Bill, MRR 20” Wheels, Powerstop Brakes, Koni SRT.T Shocks and Struts |
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05-12-2021, 08:57 PM | #2 |
fo'shizZL1
Drives: 2017 ZL1 Join Date: Aug 2017
Location: ATL
Posts: 1,281
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Yes, I'd swap those out for brass bushings (C.H.E., Smith bros, etc.) That first picture looks like you have already lost some rollers. Hopefully they are still sitting on the top side of the head down in some nook or cranny. Most people go with the brass because this tends to happen with the rollers under higher spring loads.
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2017 ZL1 M6 Black | Maggie 2650 // 103TB // Big Gulp
Past Rides- 2014 ZL1 M6 Red Hot | Tons of mods 2004 CTS-V M6 Silver | Many mods 1995 Corvette M6 Torch Red | A few more mods 1992 Camaro M5 White | A few mods |
05-12-2021, 09:01 PM | #3 | |
Quote:
I’ve been sitting here reading post after post with the endless ( I mean ENDLESS! ) debate of needle bearing style vs. bushings. Something about the CHE bushings seems to be the ticket.
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2010 Inferno Orange Metallic 2SS/RS - 6 Speed Manual
-BTR Stage 4 Cam, ID850 Injectors, E-85 Tuned, Corsa Xtreme Exhaust , Kooks 1 7/8 Headers, Melling Performance Oil Pump, ATI Super Damper, BMR Suspension: Sway Bars, Trailing Arms, 1” Lowering Springs, Differential Bushings, Rx Ported and Polished Throttle Body, VIS Racing Carbon Fiber Hood, Custom Painted - Body Kit, Entire Vehicle, ZL1 Addons Wicker Bill, MRR 20” Wheels, Powerstop Brakes, Koni SRT.T Shocks and Struts |
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05-12-2021, 09:28 PM | #4 | |
fo'shizZL1
Drives: 2017 ZL1 Join Date: Aug 2017
Location: ATL
Posts: 1,281
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Quote:
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2017 ZL1 M6 Black | Maggie 2650 // 103TB // Big Gulp
Past Rides- 2014 ZL1 M6 Red Hot | Tons of mods 2004 CTS-V M6 Silver | Many mods 1995 Corvette M6 Torch Red | A few more mods 1992 Camaro M5 White | A few mods |
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05-13-2021, 09:59 AM | #5 |
Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020
Location: Austin, TX
Posts: 2,049
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I'm using the comp cams needle bearings. I wonder if this is going to happen to mine. I mean their good enough for Nascar.
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Build Thread https://www.camaro5.com/forums/showthread.php?t=609817 |
05-13-2021, 11:19 AM | #6 |
Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017
Location: Huntsville, AL
Posts: 2,129
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05-13-2021, 11:30 AM | #7 | |
Quote:
I also called Comp Cams (which is what I have now) and they basically said sorry not sorry in the nicest way possible. With 40% of my trunnions failing after 2 years I’m a little upset they weren’t interested in more details but, that’s what happens when companies get too big these days. The customer service takes a hit. Brian Tooley Racing (Paul) was more than willing to talk with me for 10-15 minutes about an issue concerning me and my car. Definitely speaks volumes about them already.
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2010 Inferno Orange Metallic 2SS/RS - 6 Speed Manual
-BTR Stage 4 Cam, ID850 Injectors, E-85 Tuned, Corsa Xtreme Exhaust , Kooks 1 7/8 Headers, Melling Performance Oil Pump, ATI Super Damper, BMR Suspension: Sway Bars, Trailing Arms, 1” Lowering Springs, Differential Bushings, Rx Ported and Polished Throttle Body, VIS Racing Carbon Fiber Hood, Custom Painted - Body Kit, Entire Vehicle, ZL1 Addons Wicker Bill, MRR 20” Wheels, Powerstop Brakes, Koni SRT.T Shocks and Struts |
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05-13-2021, 12:20 PM | #8 |
Drives: Nickey Super Camaro Join Date: Nov 2008
Location: Loves Park, Illinois
Posts: 1,666
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Comp Cams has revised and upgraded their trunion at least three times. Does your bearing cage say made in the USA on the side or USA? I can see that you have the oil chamfers on top so they are not a first gen set. We have had issues with all of the "off shore" bearings.
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05-13-2021, 12:24 PM | #9 | |
Quote:
https://ibb.co/NyMfMKx
__________________
2010 Inferno Orange Metallic 2SS/RS - 6 Speed Manual
-BTR Stage 4 Cam, ID850 Injectors, E-85 Tuned, Corsa Xtreme Exhaust , Kooks 1 7/8 Headers, Melling Performance Oil Pump, ATI Super Damper, BMR Suspension: Sway Bars, Trailing Arms, 1” Lowering Springs, Differential Bushings, Rx Ported and Polished Throttle Body, VIS Racing Carbon Fiber Hood, Custom Painted - Body Kit, Entire Vehicle, ZL1 Addons Wicker Bill, MRR 20” Wheels, Powerstop Brakes, Koni SRT.T Shocks and Struts |
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05-13-2021, 12:47 PM | #10 |
Drives: 2000 Camaro SS, 1966 Mustang Join Date: Jan 2021
Location: Louisiana
Posts: 81
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I’d highly recommend the CHE kit. It’s hard to see but did the bearing retaining clips come off?
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05-13-2021, 12:58 PM | #11 |
I see the snap rings if that’s what you mean. But this is how they were installed.
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2010 Inferno Orange Metallic 2SS/RS - 6 Speed Manual
-BTR Stage 4 Cam, ID850 Injectors, E-85 Tuned, Corsa Xtreme Exhaust , Kooks 1 7/8 Headers, Melling Performance Oil Pump, ATI Super Damper, BMR Suspension: Sway Bars, Trailing Arms, 1” Lowering Springs, Differential Bushings, Rx Ported and Polished Throttle Body, VIS Racing Carbon Fiber Hood, Custom Painted - Body Kit, Entire Vehicle, ZL1 Addons Wicker Bill, MRR 20” Wheels, Powerstop Brakes, Koni SRT.T Shocks and Struts |
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05-13-2021, 03:28 PM | #12 | |
Drives: 2000 Camaro SS, 1966 Mustang Join Date: Jan 2021
Location: Louisiana
Posts: 81
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Quote:
The angles on the pics, I can only see one side of the rocker.
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LS3 Block (427CI) Forged Manley 4.1" crank T-Rod modded LS3 intake (by me) Ported 821 heads (by me) TSP cam 243/255 .621/.619 111 LSA HP tuners pro (by me) https://www.smokingasphalt.com/ https://www.youtube.com/channel/UCR-...cEEQ4y_YaXMD6Q |
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05-13-2021, 03:30 PM | #13 |
That’s all I have for the time being. Is there something I should be looking for?
__________________
2010 Inferno Orange Metallic 2SS/RS - 6 Speed Manual
-BTR Stage 4 Cam, ID850 Injectors, E-85 Tuned, Corsa Xtreme Exhaust , Kooks 1 7/8 Headers, Melling Performance Oil Pump, ATI Super Damper, BMR Suspension: Sway Bars, Trailing Arms, 1” Lowering Springs, Differential Bushings, Rx Ported and Polished Throttle Body, VIS Racing Carbon Fiber Hood, Custom Painted - Body Kit, Entire Vehicle, ZL1 Addons Wicker Bill, MRR 20” Wheels, Powerstop Brakes, Koni SRT.T Shocks and Struts |
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05-13-2021, 03:59 PM | #14 |
Drives: 2000 Camaro SS, 1966 Mustang Join Date: Jan 2021
Location: Louisiana
Posts: 81
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No, I was just stating that it was hard to see if both retaining clips were still on the failed trunnions because I could only see one side of the rocker in each picture. Was curious to know if that may be the cause of the failures, broken retainers.
__________________
LS3 Block (427CI) Forged Manley 4.1" crank T-Rod modded LS3 intake (by me) Ported 821 heads (by me) TSP cam 243/255 .621/.619 111 LSA HP tuners pro (by me) https://www.smokingasphalt.com/ https://www.youtube.com/channel/UCR-...cEEQ4y_YaXMD6Q |
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