My first attempt at timing the LT5 camshafts - ZR-1 Net Registry Forums

HAWAIIZR-1 · 07-27-2010

Well, after installing the camshafts to factory settings and determining TDC, getting a degree wheel mounted, making a metal bar to bolt on magnetic base, a dial indicator with homemade extension tip, and installing a indicator on the block I was ready. I screwed up drilling the hole in the plate and had to end up on top of the camshaft hold down and not ideal. I don't have a drill press and it would have meant going back to the auto craft shop on the post to drill another hole and it worked anyway.

Thanks Pete for the late night call I had to make when I initally got the camshafts and forgot that since I don't have stock camshafts it was not going to line up so easily like the factory manual and CPT video indicated.

I probably should have waited and not installed the front cover, but I did not have the heads or camshafts then and wanted to keep moving on this. So after establishing TDC before installing the heads I set up the locations on the torsional damper with the timing tab and locked everything down so I would not have to find TDC with the heads on. By the way, the tape was removed from the intake and exhaust ports during the process.

So there are many ways to do this and just threaded some welding rod that I found at the local hardware store with a 4-48 UNF die and cut to length. I was going to do the curve around the camshaft but found I did not need to by catching an area to the immediate side of the camshaft lobe.

It took me awhile intially in the learning process of this and special thanks to information from Marc Haibeck's site to give me the basic idea and more importantly the details from Jim Milstead off this Registry site that explained how to make the adjustments once I found the factory setting was 2 degrees off where I wanted to be for the intake cam.

I went around and around to get the feel and figure out the MOP (maximum opening position) and then got it down to where I feel comfortable and the other three will go much quicker. The bottom line is it was not as difficult as I thought it was going to be or maybe I am more capable than I think I am. I can see why shops would charge quite of bit of labor to do this.

I'm not done with the first cam (left intake) even though I have it adjusted and checked/confirmed a few times. I need to wait until I get help to have to back of the camshaft held for my final torque with new bolt and lots of loctite (not too much of course). Hopefully we can do the final torquing without moving the setting or will be doing it all over again. I did this by myself so it took longer. I know if I had help when making the adjustments it would have been much easier since it does not take much to move the setting once the bolt is loosened and I had to do it more than once to get the right setting and then lock it down with one arm holding the back end and the other tightening the sprocket bolt. The bottom line is get someone to help you......period. I just did it myself to get used to before having my friend come over and went farther than I had planned to; I was just going to set it up and check where the factory setting were at.

Well, I just thought I would share my novice point of view on my attempt with timing the LT5 camshafts. I'm going learn more about this over the next few days and figure out better ways of doing everthing.

Craig

Paul Workman · 07-27-2010

Quote:

Originally Posted by HAWAIIZR-1

Well, I just thought I would share my novice point of view on my attempt with timing the LT5 camshafts. I'm going learn more about this over the next few days and figure out better ways of doing everthing.

Craig

You go dude!

Serendipity...a marvelous teacher! And, you'll get the satisfaction of knowing the LT5 pretty well.

Do you have a target date for turning the key???

P.

HIZNHRZ · 07-27-2010

Quote:

Originally Posted by HAWAIIZR-1

The bottom line is it was not as difficult as I thought it was going to be or maybe I am more capable than I think I am.
Craig

I think the latter...you don't give yourself enough credit dude. There are guys who work their entire careers around engines and cars who have never been this deep inside an engine much less an LT5. Your car will be back on the road because YOU are making it happen. Once you get the cams set up I have to believe the rest is all down hill. Great job!

Scrrem · 07-27-2010

Awsome Craig!! Great documentation. Keep'm coming!!
Rich

HAWAIIZR-1 · 07-27-2010

P, Scott and Rich,

Thanks for the comments and vote of confidence. It sure is a good feeling to build one of these motors even though there were many times filled with frustration (mostly trying to get the parts and the cost). It is kind of crazy when I think about it but not much choice with the cost and logisitics of shipping it to a builder on the mainland.

I'm not sure when I will be able to turn the key, but my target is before the end of August. I still don't have the plenum, IHs and TB back yet so hopefully that does not hold me up. I would like to drop the motor back in by next week at the latest so we'll see.

I'll keep you folks posted as I make progress.

Aloha,
Craig

93 ZR1 Barcelona · 07-27-2010

I will be doing the same in mine in about two months. Just have finished to clean all parts and will send the block & heads to the machine shop maybe next week.

Were did you get those bridges to clamp the camshafts adjusted to the head bores? Custom made? Or are from the Kent Moore tooling?

Good luck with the assembly, nice job.

Regards,

Ramon.

HAWAIIZR-1 · 07-27-2010

Quote:

Originally Posted by 93 ZR1 Barcelona

I will be doing the same in mine in about two months. Just have finished to clean all parts and will send the block & heads to the machine shop maybe next week.

Were did you get those bridges to clamp the camshafts adjusted to the head bores? Custom made? Or are from the Kent Moore tooling?

Good luck with the assembly, nice job.

Regards,

Ramon.

Hello Ramon,

Great to hear from Spain and I know you have more challenges than I do with the logistics end.

I bought the camshaft temporary retainers from Bill Kirchoffer here:

http://www.zr1netregistry.com/ZR1_parts.htm

I'm not sure if he is still doing it or not as I tried to call and email some time ago with no reply to get more tools. A set with other items were on Ebay so they come up sometimes but not sure if anyone else is making them. Someone should if Bill K has stopped making them. I can't afford the real deal and all his tools worked fine for my rebuild.

I bought some tools from SPX but a little price; they have these retainers as well as some of the others:

http://gmspecialservicetools.spx.com/

Best wishes on your build too.

Aloha,

Craig

HIZNHRZ · 07-28-2010

Congrats on joining the TLC (Timed LT5 Camshafts) Club! Hopefully it is clear sailing from here to the finish line. Enjoy the ride.

HAWAIIZR-1 · 07-28-2010

Quote:

Originally Posted by HIZNHRZ

Congrats on joining the TLC (Timed LT5 Camshafts) Club! Hopefully it is clear sailing from here to the finish line. Enjoy the ride.

Thanks Scott. I think all will go well from here and I imagine a few small snags like anything else, but I can't wait to fire it up and hear the Beast come alive.

carter200 · 07-29-2010

Quote:

Originally Posted by HAWAIIZR-1

I can't wait to fire it up and hear the Beast come alive.

Craig,
You can't fire her up till you get the IH's and Plenum. Did GVD say when he'll be done? He's had them for what seems a lifetime

07-27-2010	#1
HAWAIIZR-1 Join Date: May 2010 Location: Japan Posts: 3,586	My first attempt at timing the LT5 camshafts Well, after installing the camshafts to factory settings and determining TDC, getting a degree wheel mounted, making a metal bar to bolt on magnetic base, a dial indicator with homemade extension tip, and installing a indicator on the block I was ready. I screwed up drilling the hole in the plate and had to end up on top of the camshaft hold down and not ideal. I don't have a drill press and it would have meant going back to the auto craft shop on the post to drill another hole and it worked anyway. Thanks Pete for the late night call I had to make when I initally got the camshafts and forgot that since I don't have stock camshafts it was not going to line up so easily like the factory manual and CPT video indicated. I probably should have waited and not installed the front cover, but I did not have the heads or camshafts then and wanted to keep moving on this. So after establishing TDC before installing the heads I set up the locations on the torsional damper with the timing tab and locked everything down so I would not have to find TDC with the heads on. By the way, the tape was removed from the intake and exhaust ports during the process. So there are many ways to do this and just threaded some welding rod that I found at the local hardware store with a 4-48 UNF die and cut to length. I was going to do the curve around the camshaft but found I did not need to by catching an area to the immediate side of the camshaft lobe. It took me awhile intially in the learning process of this and special thanks to information from Marc Haibeck's site to give me the basic idea and more importantly the details from Jim Milstead off this Registry site that explained how to make the adjustments once I found the factory setting was 2 degrees off where I wanted to be for the intake cam. I went around and around to get the feel and figure out the MOP (maximum opening position) and then got it down to where I feel comfortable and the other three will go much quicker. The bottom line is it was not as difficult as I thought it was going to be or maybe I am more capable than I think I am. I can see why shops would charge quite of bit of labor to do this. I'm not done with the first cam (left intake) even though I have it adjusted and checked/confirmed a few times. I need to wait until I get help to have to back of the camshaft held for my final torque with new bolt and lots of loctite (not too much of course). Hopefully we can do the final torquing without moving the setting or will be doing it all over again. I did this by myself so it took longer. I know if I had help when making the adjustments it would have been much easier since it does not take much to move the setting once the bolt is loosened and I had to do it more than once to get the right setting and then lock it down with one arm holding the back end and the other tightening the sprocket bolt. The bottom line is get someone to help you......period. I just did it myself to get used to before having my friend come over and went farther than I had planned to; I was just going to set it up and check where the factory setting were at. Well, I just thought I would share my novice point of view on my attempt with timing the LT5 camshafts. I'm going learn more about this over the next few days and figure out better ways of doing everthing. Craig __________________ Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048 Last edited by HAWAIIZR-1; 07-27-2010 at 02:44 AM.

07-27-2010	#4
Scrrem Join Date: Feb 2009 Location: Alexandria, Virginia Posts: 1,467	Re: My first attempt at timing the LT5 camshafts Awsome Craig!! Great documentation. Keep'm coming!! Rich __________________ 1990 Bright Red Coupe #608 380 Stroker, Ported Heads/Intake/Housings/TB Haibeck Secondary Delete Chip / Pete's Cams George Braml Intake / FIC Injectors Coated SW Headers / Corsa Bill Boudreau B/B ZF6 / Viper 4.10 gears Ron Davis Radiator Pioneer AVIC-Z140BH NAV Fikse FM5's 285 / 335 / C6 Brakes WAZOO Member

07-27-2010	#5
HAWAIIZR-1 Join Date: May 2010 Location: Japan Posts: 3,586	Re: My first attempt at timing the LT5 camshafts P, Scott and Rich, Thanks for the comments and vote of confidence. It sure is a good feeling to build one of these motors even though there were many times filled with frustration (mostly trying to get the parts and the cost). It is kind of crazy when I think about it but not much choice with the cost and logisitics of shipping it to a builder on the mainland. I'm not sure when I will be able to turn the key, but my target is before the end of August. I still don't have the plenum, IHs and TB back yet so hopefully that does not hold me up. I would like to drop the motor back in by next week at the latest so we'll see. I'll keep you folks posted as I make progress. Aloha, Craig __________________ Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048

07-27-2010	#6
93 ZR1 Barcelona Join Date: Aug 2007 Location: Barcelona, SPAIN Posts: 41	Re: My first attempt at timing the LT5 camshafts I will be doing the same in mine in about two months. Just have finished to clean all parts and will send the block & heads to the machine shop maybe next week. Were did you get those bridges to clamp the camshafts adjusted to the head bores? Custom made? Or are from the Kent Moore tooling? Good luck with the assembly, nice job. Regards, Ramon.

07-28-2010	#8
HIZNHRZ Join Date: Apr 2004 Location: Germantown, MD Posts: 738	Re: My first attempt at timing the LT5 camshafts Congrats on joining the TLC (Timed LT5 Camshafts) Club! Hopefully it is clear sailing from here to the finish line. Enjoy the ride.