That means the timing chain and gears are worn out / to loose.
Thay all did in the 80s
line up timing marks from harmonic balancer and timing tab on timing cover
how do i set the timing for a chevy 350 small block?
the one on the back side of them block is for firing the ignition module and the one behind the balancer is for fine tuning the timing curve
This is a good question. Yes, the keyway, is accurate. What is not, is the balancer. After 74, the balancer keyway is offset, from the timing mark. Any harmonic balancer you use, look to see where the keyway is, compared to the hash mark on it. Make sure they line up.
Have you tried looking on the engine block and on the harmonic balancer?
where are timing marks on a 4.3l on the block
It is located on the left-hand side of the engine block near the harmonic balancer.
16* bdc
Everything is different in that motor.
I'd just set it by ear and how easy it starts once it's set.
BTDC stands for "Before Top Dead Center," indicating the position of the crankshaft in relation to the piston at the top of its stroke. On a harmonic balancer, BTDC is usually marked with a timing indicator or notch. This mark helps in timing the ignition to ensure the engine runs smoothly. To find it, look for a line or notch on the balancer that aligns with a timing scale typically located on the engine block.