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?
On a 2002 Chevy Express 1500, the timing mark is typically located on the harmonic balancer, which is situated at the front of the engine. You should see a mark or notch that aligns with a timing tab on the engine block. For precise timing adjustments, it's essential to refer to the vehicle’s service manual for specific details and alignment procedures.
where are timing marks on a 4.3l on the block
To adjust the timing on a 1992 Chevy 305, first ensure the engine is at operating temperature. Locate the timing mark on the harmonic balancer and the timing tab on the engine block. Use a timing light to check the current timing by connecting the light to the number one spark plug wire and pointing it at the timing mark. To adjust, loosen the distributor hold-down bolt and rotate the distributor slightly until you reach the desired timing, then retighten the bolt.
It is located on the left-hand side of the engine block near the harmonic balancer.
16* bdc
Everything is different in that motor.