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Old 09-20-2010, 11:17 PM
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Question please help

i have been helping a buddy do a 6.0 swap on his truck. 99 silverado, LQ4, MS3, slightly worked heads. anyways, we were bolting the trans back up last night and i was turning the engine with a breaker bar so he could tighten the torque converter bolts and suddenly, it bound up. i went back the other way about 1/8th turn and went forward again and it went past the previous bind and kept spinning until it bound up again. i continued to turn back 1/8th turn, followed by the full rotation and the same thing kept happening.


fast forward to today. he puts the entire driveline back together and when i stopped by his shop after work, i try it again, but this time, when it binds up, i cant do like i had previously done to get past the bind, but i can turn the motor the opposite way (counterclockwise if facing towards front of motor while in front) and it does not bind up, but there is a faint "click" every 1/8th of a turn or so. i know for a fact it is not the torque converter binding because i stabbed it all the way (3 clicks). what do yall think?
Old 09-20-2010, 11:29 PM
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Flywheel bolts??
Old 09-20-2010, 11:31 PM
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they are torqued down

his truck is a 99 and this is an 05 motor i believe
Old 09-20-2010, 11:44 PM
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How bound up are we talking? Like as hard as you can pull?
Seems kind of weird it would go away if it was something really wrong.
Were the spark plugs in?
Old 09-21-2010, 12:07 AM
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Originally Posted by brent5631
How bound up are we talking? Like as hard as you can pull?
Seems kind of weird it would go away if it was something really wrong.
Were the spark plugs in?
Exactly what I was gonna ask! If the spark plugs are in you would be building compression, and it would be hard to move past until you let it bleed down a little. If not, then I don't know. Hope you get it worked out!
Old 09-21-2010, 12:12 AM
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no plugs. even pulling as hard as i can, it wont turn
Old 09-21-2010, 12:20 AM
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PTVC ok? (piston to valve clearance) What was done to the heads?
Old 09-21-2010, 12:39 AM
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Any internal cam clearance issues?
Old 09-21-2010, 07:09 AM
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They're 317 heads that have not been milled with an MS3, dished LQ4 pistons. And that still wouldn't explain why it'd turn one way but not the other...
Old 09-21-2010, 07:32 AM
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timing set f'd?



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