* Harmonic Balancer: Look for a notch or a single pointer mark, often a line or small indentation. This is aligned with the timing pointer on the timing cover.
* Timing Chain Cover (or Cam Gear): This is where things get a bit more variable. You'll see either:
* A pointer on the cover: This pointer aligns with a mark (notch or line) on the crankshaft sprocket (the gear on the crankshaft connected to the timing chain).
* Marks directly on the cam gear itself: Some engines have marks *cast* directly into the camshaft gear which align with corresponding marks on the timing cover.
Important Considerations:
* Top Dead Center (TDC): You will likely need to find Top Dead Center (TDC) on the #1 cylinder using the spark plug hole (or a piston stop tool). The timing marks only become truly meaningful once you've established TDC. Your repair manual will detail the procedure for precisely finding TDC.
* Repair Manual: The most accurate and reliable information will be found in a repair manual specific to your 1994 Chevy C1500 with the 350 engine. A Haynes or Chilton manual, or a factory service manual, will show pictures and precise descriptions of the timing marks. Don't rely solely on online information, especially for something as critical as engine timing.
* Engine Variations: There's some variation between the specific TBI and early Vortec 350 engines; the exact markings may differ slightly. Therefore, a repair manual is crucial.
In short: You're looking for a single mark on the harmonic balancer and either a pointer on the timing cover that aligns with it, *or* marks on the cam gear itself that align with the timing cover. But you absolutely MUST use a repair manual to confirm the location and procedure for your specific engine.
