Questioni have a 5.7 engine that has a intermitent engine knock on cold start it sounds like the rod whants to come out of the block after it builds up oil preasure it sounds normal i pulled the oil pan down last year and inspected the rod bearings all but #2 rod bearing looked good for an engine with 90,000 miles on it i took a micrometer to the crank ans it looked good so i stuck a new rod bearing in it and stuck a gm oil filter back on it but still the same knock do you think the main thrust bearing could be my problem the previous owner used to tow a boat with the truck also could you tell me the cyl head tourqe for a 1994 5.7 roller motor thanks ,mike
Answer1 Inspect Knock Sensor Improperly connected or faulty knock sensor.
2 Inspect Point Dwell Point dwell not within specified range
3 Inspect Point Gap Incorrect point gap setting.
4 Inspect Point Set Burned, worn or incorrectly set ignition points.
5 Inspect Timing Specification Incorrectly adjusted engine timing.
6 Inspect Timing Set Slipped timing chain or worn timing gear(s)
7 Inspect Timing Chain Slipped or worn timing chain.
8 Inspect Timing Belt Slipped or broken timing belt.
9 Inspect Firing Order Spark plug wire(s) not connected in correct firing order sequence
10 Inspect EGR Position Sensor Loose or faulty egr position sensor or circuit.
11 Inspect EGR Time Delay Switch Loose or faulty egr time delay switch or circuit.
12 Inspect Distributor Cap Loose or cracked distributor cap
13 Inspect Coil - Ignition Damaged or faulty ignition coil or ignition coil circuit.
14 Inspect Choke Thermostat Stuck or improperly functioning choke thermostat.
15 Inspect Wireset Worn or damaged wireset ends are not completely connected and are arcing to engine.
Hope this helps
Bruce
