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John, Master A.S.E Automotive technician
Category: Chevy
Satisfied Customers: 9176
Experience:  A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
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How do i check to see if timing chain is bad on 350 chevy truck 1997.

Customer Question

how do i check to see if timing chain is bad on 350 chevy truck 1997. truck will not start and it has 220 thousand miles on engine
Submitted: 9 years ago.
Category: Chevy
Expert:  John replied 9 years ago.

Hello rdharvard,

What is the 8th digit in teh VIN# ?

Customer: replied 9 years ago.
vin#2gcec19rxv1246909 c1500 extended cab 2d
Expert:  John replied 9 years ago.
Ok,pull #1 spark plug & rotate the engine over (by hand,breaker bar on crank) till you get the #1 piston at top dead center.Look at the balancer on the crankshaft & see if it aligns with the mark on the timing cover.Also you can test the compression of any two cylinders of your choice & if you do not have 150 lbs or better,there is mechanical problems.
John and 6 other Chevy Specialists are ready to help you
Customer: replied 9 years ago.
should the rotor cap inthe distributor be on #1 plug also
Expert:  John replied 9 years ago.
Yes,it should align up with #1 cylinder.You can also look at the slack in the chain,by using a breaker bar to move crankshaft & watch the distributor rotor.There should be a little for a 200,000 mile engine,but not a bunch.Think of the breaker on the crank as a dial on a 360 degrees scale.5 degrees is ok 10 degrees or more it too much.
Customer: replied 9 years ago.
what else should be checked if all this is ok i do not wont to tear into the engine if their is something else that can be eassley fixed causeing it not to start.
Expert:  John replied 9 years ago.
Check to see if you are getting spark to the plugs when the engine is cranking.Check the fuel pressure(50 -60 psi for port injection & 10 -16 psi for throttle body).All pressures should for 4 minutes.Scan computer system for failure codes & data from sensors.
Customer: replied 9 years ago.
i had sent you info stating that i had checked for fule and spark.
Expert:  John replied 9 years ago.
Ok,have you scanned the computer system ?
Customer: replied 9 years ago.
no i do not have that kind of tools.
Expert:  John replied 9 years ago.
To diagnose this problem a scan tool & the knowledge is needed.Check & see if you have injector pulse at the injectors.Check to see if the vehicle will fire off on carb spray or ether.