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Old 11-11-2010, 10:37 PM   #1
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Cam walk with 3 bolt conversions

Is anybody seeing any cam walk with the ls7 sprocket and a 3 bolt cam swap/conversion?
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Old 11-12-2010, 09:43 AM   #2
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Not sure what you mean about cam walk, but the 3 bolt cams are every bit as dependable as the single bolt camshafts. Remember every LS engine for the last 13+ years have run 3 bolt cams with great results.
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Old 11-12-2010, 10:13 AM   #3
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I had heard reports of the ls7 sprocket being overly soft metal in some cases, and allowing cam shafts to move up to 3/8". Then this "cam walk" was causing lifter to collapse. I was just looking for some more feedback from people who do the installs as to whether or not they had seen this issue in 3 bolt cam conversions with the ls7 sprocket.
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Old 11-12-2010, 11:45 AM   #4
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Hey I see your from St. Louis any shops up that way that are good at 2010 camaro and LS engines?
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Old 11-12-2010, 12:27 PM   #5
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Originally Posted by jsharp View Post
Hey I see your from St. Louis any shops up that way that are good at 2010 camaro and LS engines?

PBJ (Performance By Joe) on Hampton might be a good choice. He quite popular with the Vette and Viper guys. I know of one other guy here that is quite good with the LSx. He works out of his home, when not at his 8 - 5 job. But not sure how he likes to be contacted.
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Old 11-12-2010, 01:59 PM   #6
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Originally Posted by Jason 98 TA View Post
Not sure what you mean about cam walk, but the 3 bolt cams are every bit as dependable as the single bolt camshafts. Remember every LS engine for the last 13+ years have run 3 bolt cams with great results.
Apparently 3 bolt would be better according to this story.
http://www.camaro5.com/forums/showthread.php?t=114906
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Old 11-12-2010, 02:21 PM   #7
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That's news to me, I haven't had any come back for the gear wearing. 3/8" & the pistons would have hit the valves way way before that...
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Old 11-12-2010, 02:25 PM   #8
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There isn't any difference in metals that we have seen. We run more 3 bolt cams than anything and never had an issue with them. We have never had a problem with the single bolt cams that we have run as well. It is up to the installer to make sure it is installed correctly.

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Old 11-12-2010, 02:26 PM   #9
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Thanks guys
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Old 11-12-2010, 02:28 PM   #10
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Well, you cant actually use the "LS7" timing set with the Camaro, as the oil pump drive gear is to large. As for only using the upper gear, so that you can use the 4x reluctor, no there isnt an issue. Anyone who said their is, must have had an underlying issue. The timing gear, with the exception of the reluctor, is the exact same material as the other gears.

Secondly, the timing gear has nothing to do with "Cam Walk". Behind the timing gear, is a cam retaining plate. This plate is what locks the cam in place. The timing gear simply rides on the face of the cam itself. On some of the aftermarket timing sets, they use a torrington bearing that rides on the retaining plate, but even then, the retaining plate holds the cam in place.

HTH
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Old 11-12-2010, 04:01 PM   #11
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I thought of using the LS7 gear but ended up buying a set with the Torington bearing made by JP performance. No issues yet.
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Old 11-12-2010, 06:11 PM   #12
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I have not seen any issue with doing the conversion over to three bolt and we have been doing it for years as the Corvette's had the single bolt cam starting in 2007 so it isn't anything new to change them over.

Now what you may have heard, and I have seen a total of 2 cars here in the last 6 years do it, is the cam gear starts to wear and then lets the cam move. It can, if let go far enough eat a lifter. I have seen them eat into the cam retaining plate as well. From what I have seen there is no rhyme or reason on why it did it. One car had a cam, the other car was stock. Both were 3 bolt cam cars from the get go.
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Old 11-12-2010, 08:34 PM   #13
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Quote:
Originally Posted by Total_Perf_Eng View Post

Secondly, the timing gear has nothing to do with "Cam Walk". Behind the timing gear, is a cam retaining plate. This plate is what locks the cam in place. The timing gear simply rides on the face of the cam itself. On some of the aftermarket timing sets, they use a torrington bearing that rides on the retaining plate, but even then, the retaining plate holds the cam in place.

HTH
Most correct. The 3 bolt gear has nothing to do with it. Red loctite and proper torque specs are your friend
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Old 11-12-2010, 08:44 PM   #14
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cam gear

Quote:
Originally Posted by Anthony @ LG Motorsports View Post
I have not seen any issue with doing the conversion over to three bolt and we have been doing it for years as the Corvette's had the single bolt cam starting in 2007 so it isn't anything new to change them over.

Now what you may have heard, and I have seen a total of 2 cars here in the last 6 years do it, is the cam gear starts to wear and then lets the cam move. It can, if let go far enough eat a lifter. I have seen them eat into the cam retaining plate as well. From what I have seen there is no rhyme or reason on why it did it. One car had a cam, the other car was stock. Both were 3 bolt cam cars from the get go.

that is what happen he is talking about one of are camaros i will post pics to what he is talking about
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Old 11-13-2010, 10:09 AM   #15
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that is what happen he is talking about one of are camaros i will post pics to what he is talking about
I have some pictures here from the cars as well. Like I said one was bone stock and the other had a cam in it. I couldn't tell you what started it. Could be from lack of hardness on the cam gear itself, or lack of oil causing it to wear to quickly. Either way when the cam gear wears away it lets the cam walk backwards into the engine until it hits the rear plate, and if it goes far enough it can cause a lifter to go.
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Old 11-13-2010, 10:43 AM   #16
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Originally Posted by IPAINTBRIDGES31 View Post
Is anybody seeing any cam walk with the ls7 sprocket and a 3 bolt cam swap/conversion?
We have had a problem where the bolts supplied had a silicone or rubber backing on them, even from GM, even when you lock tite them and torque to spec, they may not hold, causing the bolts to start backing off, Lingenfelter has had the same issues, so we starting using a different bolt, and no further problems,
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