Comp Cams Rocker Trunion upgrade tutorial
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Comp Cams Rocker Trunion upgrade tutorial This tutorial is for installing Comp Cams 13702-KIT trunion upgrade without a hydraulic press.
What you will need:
A 6"+ C Clamp
A large socket that is larger on the inside than the trunion bearing's outer race.
A socket that is slightly smaller on the outside than the trunion bearing's outer race.
A very small circlip pliar, or alternatively a sharp pick (what I used)
Optional:
A 3 jaw puller and a thick washer/socket that is slightly larger on the inside than the trunion bearing's outer race.
This side of the rocker is where you will need to put the larger socket/washer as the anvil.
This side of the rocker is where you will put the smaller socket to press on the bearing.
Assemble your puller like this.
And use the puller/C Clamp to push the trunion out. It should press out fairly easily. You only have to move the bearings about 1/2" and the whole thing will fall apart. Make sure you have a trash can under it or you'll have needle bearings everywhere.
After about 20 minutes of pressing out stock trunions, you'll end up with this.
What you will need:
A 6"+ C Clamp
A large socket that is larger on the inside than the trunion bearing's outer race.
A socket that is slightly smaller on the outside than the trunion bearing's outer race.
A very small circlip pliar, or alternatively a sharp pick (what I used)
Optional:
A 3 jaw puller and a thick washer/socket that is slightly larger on the inside than the trunion bearing's outer race.
This side of the rocker is where you will need to put the larger socket/washer as the anvil.
This side of the rocker is where you will put the smaller socket to press on the bearing.
Assemble your puller like this.
And use the puller/C Clamp to push the trunion out. It should press out fairly easily. You only have to move the bearings about 1/2" and the whole thing will fall apart. Make sure you have a trash can under it or you'll have needle bearings everywhere.
After about 20 minutes of pressing out stock trunions, you'll end up with this.
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Set up a nice clean area for reassembly.
Assemble your C clamp with the washers on both sides of the bearings and the new trunion shaft in between the bearings. Make sure the text on the bearing race faces outward. I clamped my C clamp to my work bench with another C clamp.
Press them in, they should slide in pretty easy. Press them until the washers are flush with the rocker itself. The trunion shaft will have slight side to side play.
When everything is pressed together, use your circlip pliars to install the circlips on the trunion shafts. I used a pick because my circlip pliars were too large to fit into the holes of the circlip. If you do it this way, put a bolt through the trunion shaft to keep it from spinning and use the pick to stretch the side of the circlip over the trunion shaft. Once you get the technique right, you can do this in about 10 seconds.
Admire your finished rockers! This took me about 45 minutes to do.
Assemble your C clamp with the washers on both sides of the bearings and the new trunion shaft in between the bearings. Make sure the text on the bearing race faces outward. I clamped my C clamp to my work bench with another C clamp.
Press them in, they should slide in pretty easy. Press them until the washers are flush with the rocker itself. The trunion shaft will have slight side to side play.
When everything is pressed together, use your circlip pliars to install the circlips on the trunion shafts. I used a pick because my circlip pliars were too large to fit into the holes of the circlip. If you do it this way, put a bolt through the trunion shaft to keep it from spinning and use the pick to stretch the side of the circlip over the trunion shaft. Once you get the technique right, you can do this in about 10 seconds.
Admire your finished rockers! This took me about 45 minutes to do.
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TECH Enthusiast
Joined: May 2010
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I did this because my motor has 130k on it and I wanted to upgrade the reliability without losing the lightweight attributes of the stock rockers. The car is getting a brutespeed blower cam (.608 lift on the exhaust, .595 intake) and patriot gold springs and eventually different heads all together. The V will be turboed eventually, hence the cam selection.
