how f'ed am I
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On The Tree
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From: ill.
how f'ed am I Pulled motor off motor stand on to hoist, mounted trans tried bolting up
t-converter and motor will only turn 2/3 of a turn. Pulled trans off and still
only turn 2/3 turn. Put back on motor stand and pulled pan and windage
tray nothing on the bottom end hitting. I have not pulled anything off the
top end yet just looking for ideas of what the hell could be wrong. And yes
the plugs were out only when I was trying to turn it. The motor had been
sitting for a few months.
t-converter and motor will only turn 2/3 of a turn. Pulled trans off and still
only turn 2/3 turn. Put back on motor stand and pulled pan and windage
tray nothing on the bottom end hitting. I have not pulled anything off the
top end yet just looking for ideas of what the hell could be wrong. And yes
the plugs were out only when I was trying to turn it. The motor had been
sitting for a few months.
Did you do any work to the front? A cam swap? If so, start taking the bolts out for the retainer plate and then turn the motor. I've seen people use the wrong bolts and they will go all the way through and hit the crank.
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Thread Starter
On The Tree
Joined: Sep 2013
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From: ill.
Thanks Tex,
All I've done was put on a ls1 intake , a new oil pan and the front assy.
It's a 2001 lm7 untouched until I swap out the intake and pan. Is there any
bolt hole for the assy that go thought into the block, i.e. water pump,
alt, power steering & ect.? It feel like I'm hitting a bolt when it stops.
All I've done was put on a ls1 intake , a new oil pan and the front assy.
It's a 2001 lm7 untouched until I swap out the intake and pan. Is there any
bolt hole for the assy that go thought into the block, i.e. water pump,
alt, power steering & ect.? It feel like I'm hitting a bolt when it stops.
I was going to say the same thing. Are you certain that your child didn't put anything in the heads while it didn't have an intake on it?
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Thread Starter
On The Tree
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From: ill.
tonight's update: Pulled all front assy, and intake, still no smoking gun.
Stupid question how do you disconnect to plugs in the valley pan?
Next timing chain cover then heads, but that will have to be next week.
Stupid question how do you disconnect to plugs in the valley pan?
Next timing chain cover then heads, but that will have to be next week.
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Verdad Gallardo Have you been able to see the motor rotate full revolutions prior to the work you did to it? Not calling you a dummy either way, just trying to narrow down if this is for sure a new problem, or unknown?
Considering the engine is on a stand this should be pretty easy to pin point w/o a tear-down. If something wound up in a cylinder you should be able to identify it pretty easily (or rule it out) by rolling the motor to just before it locks and having a peek in all the plug holes.
Also, have you tried rotating the entire motor (block and all) on your engine stand to see if anything is rattling around?
Considering the engine is on a stand this should be pretty easy to pin point w/o a tear-down. If something wound up in a cylinder you should be able to identify it pretty easily (or rule it out) by rolling the motor to just before it locks and having a peek in all the plug holes.
Also, have you tried rotating the entire motor (block and all) on your engine stand to see if anything is rattling around?
Last edited by 74u; May 20, 2015 at 08:52 PM.
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From: Boston, MA
Use pliers to lightly compress the knock sensor plug, and pull straight up.
did you look down the intake runners with a flashlight to see if anything might be holding a valve open or sitting down in a runner? May save you having to pull the cylinder heads.
. 
Thread Starter
On The Tree
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From: ill.
No answer yet, pulled the heads last night. Cylinders full of what I think
is carbon that dried out and fell off filled the cylinder. going to vacuum it
out tonight and see if that was it.
is carbon that dried out and fell off filled the cylinder. going to vacuum it
out tonight and see if that was it.