11-11-2010, 09:20 AM | #29 | |
Drives: Camaro RJT 2SS/RS Join Date: Aug 2009
Location: Frederick,Maryland
Posts: 271
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That's My thinking..
Quote:
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2010 RJT SS
Port and Polished, Milled .005 Heads Patriot Valve Springs, Titanium Retainers&locks Manley Race Valves Comp Chromoly push-rods Ported T/B DT Headers, JBA H/F Catted mid pipes Magna Flow Comp series exhaust w/ Xpipe Comp Custom grind Cam Tune and Machine work done by MPC CAI Intake |
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11-11-2010, 09:40 AM | #30 |
Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009
Location: Mich
Posts: 4,482
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I would think if the chain jumped that far to not allow any running or even firing or backfiring, that some of the valves would have hit the pistons. If they are all closing normally now, seems like they didn't hit the pistons.
Check the oil, is it really stinky with gas? Like you mentioned before, the cylinders could be washed down with gas and showing little compression. If you find the timing marks still lined up, I'd look at some of the wiring and connectors. I've seen the cam sensor cause very strange no start problems without a trouble code. If they messed with one of the main harness/connectors before, that would be an area of suspicion. |
11-11-2010, 09:49 AM | #31 |
Senior Camaro Fanatic
Drives: 2011 SS/RS manual - White Join Date: Aug 2010
Location: aiken, sc
Posts: 1,980
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I am having a hard time understanding this. The LS engine must be really unlike the old small blocks. You would never even turn the engine over if the cam was not moving in correct unison with the crank.
Just like if you had just built the engine and were hand adjusting the valves and hand turning the crank for the first time, you would find out in a heartbeat if you had screwed anything up |
11-11-2010, 09:55 AM | #32 | |
Drives: Camaro RJT 2SS/RS Join Date: Aug 2009
Location: Frederick,Maryland
Posts: 271
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Checkin it out...
Quote:
So I checked the oil last night.. there's no sign of any gas in the oil pan which is good... I'm going to be dropping it anyway to get the oil pump off and replace the chain with something better. Once i verify or don't that the timing of the motor is correct, I'll do another compression test which will then tell me if any of the valves are bent or not, which i not believe they are because when the rockers are off of lobe lift, there is play in the rocker arms (remember they hydrolic lifters) which tells me they are fully seated. I"M TRYING TO STAY POSITIVE HERE haha. However if the valves are bent, I guess I'll just be getting both heads port and polished while there off, no point in not i guess.
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2010 RJT SS
Port and Polished, Milled .005 Heads Patriot Valve Springs, Titanium Retainers&locks Manley Race Valves Comp Chromoly push-rods Ported T/B DT Headers, JBA H/F Catted mid pipes Magna Flow Comp series exhaust w/ Xpipe Comp Custom grind Cam Tune and Machine work done by MPC CAI Intake |
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11-11-2010, 09:58 AM | #33 | |
Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009
Location: Mich
Posts: 4,482
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Quote:
Did you happen to notice if it has oil pressure while cranking? Last edited by Russell James; 11-11-2010 at 10:28 AM. |
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11-11-2010, 10:26 AM | #34 |
Senior Camaro Fanatic
Drives: 2011 SS/RS manual - White Join Date: Aug 2010
Location: aiken, sc
Posts: 1,980
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This would be a real lesson if the posted who mentioned Onstar disable turns out to be right
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11-11-2010, 10:47 AM | #35 |
Serious Sleeper
Drives: 2010 CGM 2SS/RS M6 Join Date: Nov 2008
Location: Lexington,SC
Posts: 3,129
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Drive-by Fact of Life: After Monday and Tuesday even the calendar reads... W T F *************************************** |
11-11-2010, 11:15 AM | #36 |
Drives: Camaro RJT 2SS/RS Join Date: Aug 2009
Location: Frederick,Maryland
Posts: 271
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ONSTAR....
We'll see... I just called Onstar and verified again that the disable feature WAS NOT engaged and they confirmed. Wish it was that easy....
__________________
2010 RJT SS
Port and Polished, Milled .005 Heads Patriot Valve Springs, Titanium Retainers&locks Manley Race Valves Comp Chromoly push-rods Ported T/B DT Headers, JBA H/F Catted mid pipes Magna Flow Comp series exhaust w/ Xpipe Comp Custom grind Cam Tune and Machine work done by MPC CAI Intake |
11-11-2010, 11:32 AM | #37 |
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Good luck. Sorry you had to be the Guinea pig in this situation but you may help other people out later on with their cam builds and repairs. I may have missed your answer but did you upgrade to the 3 bolt?
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11-11-2010, 12:01 PM | #38 |
Drives: Camaro RJT 2SS/RS Join Date: Aug 2009
Location: Frederick,Maryland
Posts: 271
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3 Bolt...
No i did not go with a three bolt, stayed with a single bolt...
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2010 RJT SS
Port and Polished, Milled .005 Heads Patriot Valve Springs, Titanium Retainers&locks Manley Race Valves Comp Chromoly push-rods Ported T/B DT Headers, JBA H/F Catted mid pipes Magna Flow Comp series exhaust w/ Xpipe Comp Custom grind Cam Tune and Machine work done by MPC CAI Intake |
11-11-2010, 01:13 PM | #39 | |
Not just any car!
Drives: Orange Krate DOB - 11/22/2010 Join Date: Oct 2009
Location: Simi Valley, CA
Posts: 1,848
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Quote:
PS-When I went to an industrial repair school (36 years ago) I learned that "90% of all mechanical problems are electrical".
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11-11-2010, 04:55 PM | #40 | |
Drives: Camaro RJT 2SS/RS Join Date: Aug 2009
Location: Frederick,Maryland
Posts: 271
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***UPDATE*** Are you guys ready for this....
Quote:
I got home and started the tear down.. I got off all the usual pieces (water pump, hoses, serpentine belt, moved the alternator out of the way, and FINALLY got all nervous and pulled the Timing Chain Cover. "What do my wondering eyes should appear a full and complete timing chain and gear" right? I stood back for a minute and thought to my self "Self" what in the world is going on here... And my mind went back to a previous thought i had to day while sitting at work. I WONDER.... I USED A SINGLE BOLT CAM, and the on those cams they have a pin that is formed into the cam that helps align the timing gear... are you getting where i'm going with this... Yep you guessed it.. the pin sheered completely off the cam and stayed stuck in the timing gear. The only reason the cam was spinning when i was cranking the motor over with the ratchet was because the cam bolt was holding the gear tight enough to actually spin over the cam and move the valves. So basically as soon as the pin broke the motor shut down because of a loss of compression on all cylinders because nothing was moving at all! except the pistons of course. THANK GOD I WAS AT IDLE and there is no piston to valve problems! And the pictures you all have been waiting for are below... Needless to say a three bolt camshaft, gear and LS2 tensioner is going back in there to solve that problem. All you single bolt cam thinkers... THINK AGAIN and don't do it.. go with the three bolt! Cam gear with PIN still in it inside of cam gear, pin still in it Cam with pin sheered off Let the questions/beatings begin
__________________
2010 RJT SS
Port and Polished, Milled .005 Heads Patriot Valve Springs, Titanium Retainers&locks Manley Race Valves Comp Chromoly push-rods Ported T/B DT Headers, JBA H/F Catted mid pipes Magna Flow Comp series exhaust w/ Xpipe Comp Custom grind Cam Tune and Machine work done by MPC CAI Intake |
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11-11-2010, 05:09 PM | #41 |
Drives: 2010 Transformer 1SS Camaro Join Date: Nov 2009
Location: Kingsland, Ga
Posts: 2,553
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What would have been the best way to prevent this from happening? I am looking into getting a cam here in about 6 months and figuring what all should I get done with the cam job instead of just springs and rods to get the build right?
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11-11-2010, 05:13 PM | #42 |
Drives: 2011 Victory Red Auto 2SS Join Date: Aug 2010
Location: West Tn
Posts: 628
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Sounds like u may have dodged the bullet! Congratulations!
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