Knocks on Start-Up but Only Lasts a Few Seconds for Chevrolet S10 Pickup - 4WD 1997
| • | Improper oil viscosity. Install recommended oil viscosity for
expected temperatures. |
| • | Excessive piston to bore clearance. |
| • | Excessive piston pin to piston clearance. |
| • | Excessive crankshaft end clearance. |
| • | Excessive crankshaft bearing clearance. |
Some engine noise may be normal for 1-3 seconds at start-up. Be
sure that any noise that is identified is really coming from the engine. (i.e.
ABS initialization noise)
