LT1 timing question
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 4,871
Likes: 15
From: Detroit's West Side MI
LT1 timing question
Can someone with an LT1/4 please do me a favor? Check the location of the mark on the harmonic balancer with piston #1 at tdc?
I have a timing issue, and before I pull the front of the damn motor off and check my opti rotor position I was hoping I could at least tell how close it is this way. If memory serves, the HB pulley can go on different ways, but the balancer itself is keyed, therefore the mark on it should be in the same place for all of us at that position...
Of course if anyone already knows the answer that's fine, too
I have a timing issue, and before I pull the front of the damn motor off and check my opti rotor position I was hoping I could at least tell how close it is this way. If memory serves, the HB pulley can go on different ways, but the balancer itself is keyed, therefore the mark on it should be in the same place for all of us at that position...
Of course if anyone already knows the answer that's fine, too
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Originally Posted by fredk
#1 at TDC should have the arrow at 12:00 on compression stroke.
Fred
Fred
Le Mans Master
Joined: Dec 2004
Posts: 5,789
Likes: 8
From: Myrtle Beach SC
St. Jude Donor '05-'06
Originally Posted by MikeC4
but the HB is not keyed, so even if there is an arrow, there is no guarantee that it wasn't shifted somewhere down the line....
Thread Starter
Safety Car
Joined: Jul 2001
Posts: 4,871
Likes: 15
From: Detroit's West Side MI
I took a closer look at my old block and realized i'm backwards. The pulley only goes on one way, the balancer itself can go on any way. THerefore I don't see how it can be used to check positioning.
Damn internally balanced engines.
Guess I'll have to put some degree tape on it and check with a timing light.
Damn internally balanced engines.
Guess I'll have to put some degree tape on it and check with a timing light.
Le Mans Master
Joined: Apr 2001
Posts: 7,411
Likes: 253
From: Little Elm TX
The front hub and pully is 0 balanced from the factory. It doesn't make a difference how it's installed as to a balancing issue. I've had mine apart recently and I don't even remember any timing marks on it. I know the main hub that bolts to the crank was not set a TDC (the arrow on it) when I took it off. I tried to get it on that way, but I really don't know that it makes any difference. Timing on a LT is set by the computer. You just have to make sure everything is lined up when you put the motor together. I check my timing by laptop and Data Master.
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Joined: Apr 2001
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From: Little Elm TX
Originally Posted by ScaryFast
I'm trying in vain to do this...see the multiple threads in the scan and tune section...