Write-Up needed! Trunion Upgrade
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ЯєŧąяĐ Єl¡m¡иąŧøя ™
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From: Justin, TX
I also just pasted the link to this thread in an existing sticky (because someone was bound to ask about it sooner or later) here:
https://ls1tech.com/forums/generatio...-me-first.html
https://ls1tech.com/forums/generatio...-me-first.html
Thread Starter
ЯєŧąяĐ Єl¡m¡иąŧøя ™
iTrader: (18)
Joined: Nov 2004
Posts: 16,083
Likes: 4
From: Justin, TX
Why does everyone want to put parts in the oven?! Rockers, crank pulleys, headlights...LOL Set those things outside on the pavement in N. Texas and you can save the electric/gas bill a few bucks.
Last edited by orangeapeel; Aug 30, 2010 at 05:13 AM.
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I'm installing the trunions now. Had 3 that felt like crap. Notchy and just rough feeling. Swapped the bearings between the 3 and now I have 14 rockers that are smooth and 2 are just plain bad and can barely get the trunion into the bearings of the bad ones.
Pm me if you have any other tips or need to do to fix this.
Pm me if you have any other tips or need to do to fix this.
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Joined: Jul 2011
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I measured the side-to-side play on the trunion after bearing installation per Comp Cam instructions and it comes out around 0.010" ~ 0.012". I had one that was about 0.022" and discovered the two flats on one side of the rocker arm (part of the casting) stuck up farther than the rest of the side plane of the rocker arm side where the bearing presses in. So when the bearing is pressed, it doesn't go down as far as if the two flats were even with the rest of the side of the rocker arm. I found a 15mm socket that fit nicely over the trunion and just contacted the race of the bearing and gave it a couple of taps with a small hammer to get the side-to-side play down to 0.010" ~ 0.012" as the others.
BTW ... before I disassembled the OEM rockers I measure the trunion side-to-side on them to be ~ 0.020" ... seemed kind of sloppy to me. Wonder if having less side-to-side with the new trunion kit will help quiet down the valve train at all?
I used a 1 ton arbor press (mounted to my workbench) I got at Harbor Freight for $45 to install the kit .... works great! See attached photos.
Last edited by ZeeOSix; Jul 10, 2011 at 10:24 PM.
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Joined: Jul 2011
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This is how I punched out the OEM bearings (see attached photos). Drilled a 7/8" hole through a "high tech" 2x4 and set the rocker arm over the hole ... then punch out the trunion with a flat punch as shown. Flip the rocker over and use the inner race without bearings over the end of the trunion and use that with a punch to pop out the other side bearing's outer race. Worked good and the OEM bearings where easy to remove. Use of the wood block ensured no damage to the rocker arm.
This is how I punched out the OEM bearings (see attached photos). Drilled a 7/8" hole through a "high tech" 2x4 and set the rocker arm over the hole ... then punch out the trunion with a flat punch as shown. Flip the rocker over and use the inner race without bearings over the end of the trunion and use that with a punch to pop out the other side bearing's outer race. Worked good and the OEM bearings where easy to remove. Use of the wood block ensured no damage to the rocker arm.
I'm in the process of installing the Comp Cam trunion kit right now ... got 1/2 of them done today. Taking my time to make sure everything is perfect and make some measurements along the way.
I measured the side-to-side play on the trunion after bearing installation per Comp Cam instructions and it comes out around 0.010" ~ 0.012". I had one that was about 0.022" and discovered the two flats on one side of the rocker arm (part of the casting) stuck up farther than the rest of the side plane of the rocker arm side where the bearing presses in. So when the bearing is pressed, it doesn't go down as far as if the two flats were even with the rest of the side of the rocker arm. I found a 15mm socket that fit nicely over the trunion and just contacted the race of the bearing and gave it a couple of taps with a small hammer to get the side-to-side play down to 0.010" ~ 0.012" as the others.
BTW ... before I disassembled the OEM rockers I measure the trunion side-to-side on them to be ~ 0.020" ... seemed kind of sloppy to me. Wonder if having less side-to-side with the new trunion kit will help quiet down the valve train at all?
I used a 1 ton arbor press (mounted to my workbench) I got at Harbor Freight for $45 to install the kit .... works great! See attached photos.
I measured the side-to-side play on the trunion after bearing installation per Comp Cam instructions and it comes out around 0.010" ~ 0.012". I had one that was about 0.022" and discovered the two flats on one side of the rocker arm (part of the casting) stuck up farther than the rest of the side plane of the rocker arm side where the bearing presses in. So when the bearing is pressed, it doesn't go down as far as if the two flats were even with the rest of the side of the rocker arm. I found a 15mm socket that fit nicely over the trunion and just contacted the race of the bearing and gave it a couple of taps with a small hammer to get the side-to-side play down to 0.010" ~ 0.012" as the others.
BTW ... before I disassembled the OEM rockers I measure the trunion side-to-side on them to be ~ 0.020" ... seemed kind of sloppy to me. Wonder if having less side-to-side with the new trunion kit will help quiet down the valve train at all?
I used a 1 ton arbor press (mounted to my workbench) I got at Harbor Freight for $45 to install the kit .... works great! See attached photos.