Check your trunions! - Page 4 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

JLE58 · 01-01-2013, 02:29 PM

How's everything else look? This set up is fairly new isn't it?

1Camaro2SS · 01-01-2013, 02:57 PM

Did you use any assembly lube for the first initial start up? I used a spray from Comp to ensure the springs and trunions were well lubed. As you most likely know it can take as long as 20 seconds for the oil pump to deliver oil to the parts.

Moreno1 · 01-01-2013, 03:45 PM

Quote:

Originally Posted by litle88

Gotcha! Reason I ask is because I emailed YT about their max spring pressures and they said 420 lbs is the max. Make sure you check how much those spring pressures of yours are. Just FYI bud.

I should have my YT next week. I will be replace my Comp trunnion. The engine hasn't been fired up yet, so they are brand new. I'm try now to eliminate as many week points as possible and YT has a great bolt on product. I

Here is a vib on them.

f anybody, is looking for rockers with brand new Comp trunnion already install, let me know.

lexlueger · 01-01-2013, 04:04 PM

GT-9/11 are murder on your valve train. Yella terras will fair no better with that cam. There actually weaker than stock. Jessel make a great rocker!

429 · 01-01-2013, 04:46 PM

Quote:

Originally Posted by JLE58

How's everything else look? This set up is fairly new isn't it?

It all looks brand new! (Rods,mains,cam,rocker tips, valve tips) Setup has around 4k on it. Yes on assembly lube

NC-V · 01-01-2013, 07:53 PM

What kind of rpms have you been turning? ~480lbs @ ~.670 lift is putting an awful lot of strain on a single pedestal mount rocker. That is asking quite a bit of a little 8x1.25 bolt into an aluminum head. Have you ever seen what your valve train looks like at high rpms? (like a bunch of wet noodles flopping around)
The wear is right in the load area of the bearings, and since everything else looks OK than I would say it isn't an oiling issue. Maybe a hardening issue on the trunion or just too much load on too small of a bearing surface.

Alvin@PCMofNC · 01-01-2013, 08:35 PM

Those trunions worry me.. Have you called comp about the issue? What type of oil? I wouldn't be worried about the missing piece of snap ring. It's not great but it would have to make it by the oil pickup tube, oil pump, then filter before it got to anything else.

Call Comp. See what they say.

Moreno1 · 01-02-2013, 08:04 AM

Quote:

Originally Posted by lexlueger

GT-9/11 are murder on your valve train. Yella terras will fair no better with that cam. There actually weaker than stock. Jessel make a great rocker!

Your absolutely right, Jessel makes some nice rockers! I also love their belt driving timing chain.

Below is a video from 2012 PRI that show the difference between stock rockers, YT and the competition. It is very insightful.

litle88 · 01-02-2013, 02:02 PM

Not starting anything Nathan but I've heard of more Yella Terra's breaking rockers than stock ones even . Don't forget to check your spring pressures as YT's have a max of 420lbs. Even on

litle88 · 01-02-2013, 02:03 PM

Not starting anything Nathan but I've heard of more Yella Terra's breaking rockers than stock ones even on the Ls1's. Don't forget to check your spring pressures as YT's have a max of 420lbs.

litle88 · 01-02-2013, 02:05 PM

Chris have you entertained the idea that you also have a .660 lift but you also have a 1.8 rocker ratio AND LsL lobes are not exactly lazy according to Comp.

Maybe on this next go round you switch to a better oil? Non syn Vr1 and a melling pump? Just saying bud.

JDP Motorsports · 01-02-2013, 02:30 PM

Quote:

Originally Posted by 429

One broke off completely, and rode through motor. One looks like this. Not sure if comp put out a bad batch of clips or what, but this is garbage. Take 30 minutes and pop off your valve covers to doublecheck your clips, if you've done a trunion upgrade recently.

We've never had an issue with a COMP trunion kit and the OEM rockers are the best option in my opinion. What heads are you running and who did the machine work?

Quote:

Originally Posted by Nathan Moreno

I should have my YT next week. I will be replace my Comp trunnion. The engine hasn't been fired up yet, so they are brand new. I'm try now to eliminate as many week points as possible and YT has a great bolt on product. I

Here is a vib on them.

f anybody, is looking for rockers with brand new Comp trunnion already install, let me know.

I've broken too many of those... I'd go with Jesel if I was going aftermarket..

Kind regards,

Jordan Priestley
888.308.6007

litle88 · 01-02-2013, 03:15 PM

JDP they are the TSP Ls7 small bore heads.

Yes I agree about the stock rockers being lighter and stronger with the YT's. sorry Nate I'd just hate for you to break something and I've know you have a nice build going bud. I know it's your build just bending your ear that's all.

willhe64 · 01-02-2013, 03:42 PM

Without trying to be a jerk. Those snap rings could have been abused during the install. Opening them up too much with the pliers.

01-01-2013, 02:57 PM	#44
1Camaro2SS Drives: 2010 2SS/RS L99 Join Date: Sep 2010 Location: Grand Rapids, MI Posts: 1,430 View My Garage	Did you use any assembly lube for the first initial start up? I used a spray from Comp to ensure the springs and trunions were well lubed. As you most likely know it can take as long as 20 seconds for the oil pump to deliver oil to the parts. __________________ 432 RWHP 391 RWTQ 12.37 1/4 mile on stock tires

01-01-2013, 04:04 PM	#46
lexlueger Drives: V10 BMW M5, Supercharged 2SS/RS Join Date: Jun 2010 Location: Charlotte NC /Brooklyn NY Posts: 2,305	GT-9/11 are murder on your valve train. Yella terras will fair no better with that cam. There actually weaker than stock. Jessel make a great rocker! __________________ MAST 416 STROKER: STAGE 3 TVS 2300 CUSTOM CAM TPIS 102 TB IW 8 RIB PULLEY W/ OD COG REARS NX EXPRESS/NANO KIT KDI HEAT EXCHANGER/ROTOFAB RESERVOIR CIRCLE D 2800 TC/FLEX PLATE/ADM TRANS COOLER DSS DRIVESHAFT/1400 HP AXLES EATON TRUETRAC -LPE 3.27 GEARS DYNATECH HEADERS/MAGNAFLOW EXHAUST SQUASH RETURN STYLE FS ID 850's E85/ FLEXFUEL BMR/EIBACH SUSPENSION KILL MODE, ON.

01-02-2013, 02:02 PM	#51
litle88 V8 Lounge member #2 Drives: 2001 Ws6 Join Date: Sep 2009 Location: Burbank,IL Posts: 6,373	Not starting anything Nathan but I've heard of more Yella Terra's breaking rockers than stock ones even . Don't forget to check your spring pressures as YT's have a max of 420lbs. Even on __________________ 2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.

01-02-2013, 02:03 PM	#52
litle88 V8 Lounge member #2 Drives: 2001 Ws6 Join Date: Sep 2009 Location: Burbank,IL Posts: 6,373	Not starting anything Nathan but I've heard of more Yella Terra's breaking rockers than stock ones even on the Ls1's. Don't forget to check your spring pressures as YT's have a max of 420lbs. __________________ 2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.

01-02-2013, 02:05 PM	#53
litle88 V8 Lounge member #2 Drives: 2001 Ws6 Join Date: Sep 2009 Location: Burbank,IL Posts: 6,373	Chris have you entertained the idea that you also have a .660 lift but you also have a 1.8 rocker ratio AND LsL lobes are not exactly lazy according to Comp. Maybe on this next go round you switch to a better oil? Non syn Vr1 and a melling pump? Just saying bud. __________________ 2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.

01-01-2013, 02:29 PM	#43
JLE58 Drives: CGM,twin turbo, cam 2010 SS/RS Join Date: Mar 2011 Location: ROCKMART, GA Posts: 2,185	How's everything else look? This set up is fairly new isn't it?

01-01-2013, 07:53 PM	#48
NC-V Drives: cts-v Join Date: Dec 2011 Location: Mooresville, NC Posts: 506	What kind of rpms have you been turning? ~480lbs @ ~.670 lift is putting an awful lot of strain on a single pedestal mount rocker. That is asking quite a bit of a little 8x1.25 bolt into an aluminum head. Have you ever seen what your valve train looks like at high rpms? (like a bunch of wet noodles flopping around) The wear is right in the load area of the bearings, and since everything else looks OK than I would say it isn't an oiling issue. Maybe a hardening issue on the trunion or just too much load on too small of a bearing surface.

01-01-2013, 08:35 PM	#49
Alvin@PCMofNC Drives: 2010 IOM RSS Join Date: May 2009 Location: Mooresville Posts: 363	Those trunions worry me.. Have you called comp about the issue? What type of oil? I wouldn't be worried about the missing piece of snap ring. It's not great but it would have to make it by the oil pickup tube, oil pump, then filter before it got to anything else. Call Comp. See what they say.

01-02-2013, 03:15 PM	#55
litle88 V8 Lounge member #2 Drives: 2001 Ws6 Join Date: Sep 2009 Location: Burbank,IL Posts: 6,373	JDP they are the TSP Ls7 small bore heads. Yes I agree about the stock rockers being lighter and stronger with the YT's. sorry Nate I'd just hate for you to break something and I've know you have a nice build going bud. I know it's your build just bending your ear that's all. __________________ 2001 ws6, 40k miles, Ls3 416 stroker, short block built by PER the rest by me. LPE Ls3 heads milled to 12-1 comp, FAST 102, NW 102, kooks 2", dual DMH cutouts, Magnaflow C/B, BTR cam + springs. Full UMI suspension.

01-02-2013, 03:42 PM	#56
willhe64 Drives: 2012 45th Vert, 2011 4x4, 9sec Vega Join Date: Mar 2012 Location: Canada Posts: 2,188	Without trying to be a jerk. Those snap rings could have been abused during the install. Opening them up too much with the pliers. __________________ I feel it only fair to warn you, I have a black belt in CAPS LOCK.