Timing Chain Inspection and Replacement
- Thread starter Tynan918
- Start date
scoti ... Another thing I noticed, on TDC Compression Stroke, the distributor rotor is pointing directly in the opposite position that it should be...points at 11:00, towards the firewall, passenger seat/door area.
I know it's on TDC Compression stroke:
1. My brother felt air being pushed out of cylinder 1 spark plug hole as I was lining up the timing gears dots.
2. With the dots lined up, cylinder 1 valves are up and closed.
and
3. I am not able to install the cylinder stop tool into the cylinder 1 spark plug hole, because of the cylinder being up all the way.
That all indicates the motor is at TDC... but instead of the rotor pointing at cylinder 1 (5:00), its pointed in the opposite direction (11:00).
Could I be 180° out by not installing the distributor correctly, which is why it's pointing in that direction on TDC ?
I know it's on TDC Compression stroke:
1. My brother felt air being pushed out of cylinder 1 spark plug hole as I was lining up the timing gears dots.
2. With the dots lined up, cylinder 1 valves are up and closed.
and
3. I am not able to install the cylinder stop tool into the cylinder 1 spark plug hole, because of the cylinder being up all the way.
That all indicates the motor is at TDC... but instead of the rotor pointing at cylinder 1 (5:00), its pointed in the opposite direction (11:00).
Could I be 180° out by not installing the distributor correctly, which is why it's pointing in that direction on TDC ?
Noticed something awkward about the position my camshaft timing gear is faced on TDC...(how it looked when I pulled off the camshaft gear.)
According to this manual, my bolts are facing the opposite direction the manual says it should be... I have an '83-84...
The direction mine faces, is that of a '63-79 SBC...
But yet my cylinder 1 intake and exhaust valves are closed (up), showing TDC on compression stroke...
According to this manual, my bolts are facing the opposite direction the manual says it should be... I have an '83-84...
The direction mine faces, is that of a '63-79 SBC...
But yet my cylinder 1 intake and exhaust valves are closed (up), showing TDC on compression stroke...
Look at pics again, the lower one is aligned to #6 TDC...see where the dowel is?
Ok, I finally got the new timing chain installed.
As required, I set the camshaft gear at 6 o'clock and the crankshaft at 12 o'clock (Cylinder 6 TDC) and then installed the timing chain set.
Once the timing chain was installed I turned the crankshaft 1 rotation clockwise and lined the dots up, the camshaft gear was at 12 o'clock and the timing gear was at 12 o'clock (Cylinder 1 TDC), which is where it is set currently.
I also bought a new 6.75" balancer and put it on to see the timing mark line up, and it points to 12 o'clock... Everything is up at 12 o'clock and the rotor points at Cylinder 1, valves closed...
My timing is correctly set in this area..
As required, I set the camshaft gear at 6 o'clock and the crankshaft at 12 o'clock (Cylinder 6 TDC) and then installed the timing chain set.
Once the timing chain was installed I turned the crankshaft 1 rotation clockwise and lined the dots up, the camshaft gear was at 12 o'clock and the timing gear was at 12 o'clock (Cylinder 1 TDC), which is where it is set currently.
I also bought a new 6.75" balancer and put it on to see the timing mark line up, and it points to 12 o'clock... Everything is up at 12 o'clock and the rotor points at Cylinder 1, valves closed...
My timing is correctly set in this area..
Now... Installing the new timing cover...
I've been watching a few techniques on how to do this without removing or lifting the engine.
Seen one where this kid removed his oil pan by putting the crankshaft on TDC.
But a lot of other guys are wedging two screwdrivers at each end of the front of oil pan and prying it down a small bit to slip the timing cover gasket on correctly...
I've been watching a few techniques on how to do this without removing or lifting the engine.
Seen one where this kid removed his oil pan by putting the crankshaft on TDC.
But a lot of other guys are wedging two screwdrivers at each end of the front of oil pan and prying it down a small bit to slip the timing cover gasket on correctly...
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