Generation IV External Engine - comp cams trunion upgrade kit

Can anyone advise what special tools are needed to install these other than standard sockets and wrenches? Also where can I get the correct torque numbers for bolts on rocker arms and valve covers? Thanks in advance!

There's a couple of YouTube videos on the exact procedure and tools needed.

I used a brass drift to knock out the old bearngs and used my bench vice to press in the new ones. They come with spacers to make it easy. Very simple.

There are instructions provided with the kit, it takes most guys about 30-40 minutes to install the upgrade. Very simple!

Is there a lift or spring pressure limit when exceeded one should consider upgrading their lifters? Example 400# spring pressure or around .600" lift.

Can anyone advise what special tools are needed to install these other than standard sockets and wrenches? Also where can I get the correct torque numbers for bolts on rocker arms and valve covers? Thanks in advance!

FSM has the torque. 22 ft/lbs for the rocker bolt and 106 in/lbs for the valve cover.

Best follow the CompCams's video, the other long 11 minutes Ytube video is dangerous, he punched out oem trunion with punch and hammer, then bangs rockers on metal table. His actions looks macho and might look good on TV but clearly, he lacks fineness. His actions indicates that he has no understanding that metal can get distorted when bang around! Never a good idea to bang internal engine components!

Keep in mind, to remove or install trunions, one needs to keep the process inline and perpendicular to avoid distortion. I made my .900 base and .005 drift as recommended by CompCams and used the combinations on my mill. But a drill press will do just fine. I'd found the stock bearings tighter during removal and the new trunion bearing reinstall not so much!

Take your time, its not how fast a person can do it, we are dealing with fitting precision bearings - remember "haste makes waste"!

Good luck!

Thanks to all! Good 411

I used a bench-mounted screw vise and taped aluminum strips on the jaws to avoid gouging the rocker arms. It was quick, easy, and didn't have any issues.

We can all justify with whatever used for the install - most choose alternatives due to lack of resource!

Keep in mind, the truer it is inline and perpendicular, the less variables we have to deal with and ends up with less complications down the line!

Summit has the proper tools to get this done

http://www.summitracing.com/parts/SME-906011/

http://static.summitracing.com/global/images/prod/large/SME-906011.jpg

Be very careful not to over-stretch the snap rings and check each one for cracks/fractures after it's installed.

We have a tool similar to LFSADRG's picture, but on my personal vehicles I have used a bench vise or a small arbor press.

We have a tool similar to LFSADRG's picture, but on my personal vehicles I have used a bench vise or a small arbor press.

You ever notice how the acme thread on a vise draws on the jaws.

I would not consider a bench vise over a arbor press with its rack and pinion!

Even though my machinist bench vise is a high priced Wilton!

We can all justify with whatever used for the install - most choose alternatives due to lack of resource!

Keep in mind, the truer it is inline and perpendicular, the less variables we have to deal with and ends up with less complications down the line!

i chose the horizontal screw vise over my vertical hydraulic press because of the finer control and feedback I get with the handle. this way I could ensure each bearing went in with the same resistance and there were no issues.

i chose the horizontal screw vise over my vertical hydraulic press because of the finer control and feedback I get with the handle. this way I could ensure each bearing went in with the same resistance and there were no issues.

Using any sized hydraulic press is like using .50 caliber to kill a chicken in this case!

If vise is chosen for the feel, only the precision milling vise offers any sort of parallelism! But the short fall with precision milling vise is the movable portion of the jaw, it is designed to pull work down during the final lock down, which is outstanding for its intended design for secure work hold down! But if this type of vise is used as bearing press and you don't need to lock down, it should be more then sufficient to provide true in line closing and ensure perpendicularity for the bearing fit into the rocker's bore.

Normal bench vise has only acme thread - the good one that is. It doesn't have the machined, fitted, grounded and mated surface to slide on as the milling vise!

Oddly enough, I bought my arbor press just for doing trunion upgrades! Its simple, gives me total control (or at least a better feel of it), and is consistent.

How did the trunion upgrade work out for you?

Mike

Oddly enough, I bought my arbor press just for doing trunion upgrades! Its simple, gives me total control (or at least a better feel of it), and is consistent.

At Texas-Speed, your company doesn't have a simple drill press? Arbor press is great, but an drill press can do that plus many other duties!

I don't have a business nor a drill press! But I do have a mill and a lathe! I did my trunion upgrade with the mill but I can also do it with the lathe. But the mill is infinitely easier since I don't have to balance the parts other than centering it. Out of the two, mill is my favorite. Besides milling, I used it to compress recycle cans, breaking bead off motorcycle tires and such, terrific mechanical advantage.

Quote:

Originally Posted by Jake@Texas-Speed

Oddly enough, I bought my arbor press just for doing trunion upgrades! Its simple, gives me total control (or at least a better feel of it), and is consistent.

At Texas-Speed, your company doesn't have a simple drill press? Arbor press is great, but an drill press can do that plus many other duties!

I don't have a business nor a drill press! But I do have a mill and a lathe! I did my trunion upgrade with the mill but I can also do it with the lathe. But the mill is infinitely easier since I don't have to balance the parts other than centering it. Out of the two, mill is my favorite. Besides milling, I used it to compress recycle cans, breaking bead off motorcycle tires and such, terrific mechanical advantage.

he said he has the arbor press for his own personal use. my guess its at his house. haha



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he said he has the arbor press for his own personal use. my guess its at his house. haha



Posted from LS1Tech.com App for Android

He did not specify was for his own personal use, but he did say "just for doing trunion upgrades".

I did not want to make assumptions, but its all good!

At Texas-Speed, your company doesn't have a simple drill press? Arbor press is great, but an drill press can do that plus many other duties!

LOL

Are you trying to give him a hard time for using the right tools to do a job? Sure a mill or drill press could be used for light press duty, but if you have the right tool available, why not use it?

I have a small arbor press at home. How much force is required to do this?

"if you have the right tool available, why not use it?"

Exactly.

it should be noted that the Comp Cams trunnion bearing instruction manual does not specify the type of press to be used.

I have a small arbor press at home. How much force is required to do this?

Very little force is required for this installation; I used a quite small arbor press while installing mine and had no issues at all. Short money, easy installation with the included tools (plus a deep socket or other random piece hanging around your cellar).

C

At Texas-Speed, your company doesn't have a simple drill press? Arbor press is great, but an drill press can do that plus many other duties!

I don't have a business nor a drill press! But I do have a mill and a lathe! I did my trunion upgrade with the mill but I can also do it with the lathe. But the mill is infinitely easier since I don't have to balance the parts other than centering it. Out of the two, mill is my favorite. Besides milling, I used it to compress recycle cans, breaking bead off motorcycle tires and such, terrific mechanical advantage.

He did not specify was for his own personal use, but he did say "just for doing trunion upgrades".

I did not want to make assumptions, but its all good!

I bought my arbor press for personal use. Although, I can assure you that Texas Speed does have a drill press!

I bought my arbor press for personal use. Although, I can assure you that Texas Speed does have a drill press!

Right on Jake!

No disrespect intended, just discussing about the tools used, as others are on subject and made clear their view with tool/technique choice! I always hope to learn something from discussions or hope I have contributed something also.

Naturally, we have to make do with whatever our resource and experience!

I hope I have not come across as giving you or anyone a hard time!