First: NEVER insert a screwdriver into the spark plug hole to find TDC. You can nick or scratch the top of the piston head, which will cause hot spots which in time will crack the piston head which in time will mean you will be paying for a major engine rebuild! Instead, use a plastic (not wire, not wood) coat-hanger cut along it's longest length. Second: You need to know more than just where TDC is for most applications. What most people really need to know is where is TDC on the COMPRESSION stroke. (The stroke where the spark plug fires, rather then the exhaust stroke where the piston pushes the waste gasses out of the combustion chamber at TDC). You do this by putting your thumb against the hole where spark plug # 1 goes. Then rotate the engine by hand (ALWAYS clockwise if you are standing in front of the vehicle, facing it) and wait until you feel a large puff of air escaping. THAT is TDC on the compression stroke. Pull off your Distributor Cap and look at where the rotor is pointing. It should be pointing to Cylinder #1. If not, you either mistook the small puff of air that happens on the exhaust stroke for the big puff of air that happens on compression, OR, your distributor is not seated right in the engine.
BTW: Cylinder #1 on a Chevy 350 V8 is on the front left (meaning driver's side of the engine closest to the front of the vehicle.)
Zero, tdc / top dead center
8 degrees before TDC
8 degress before TDC
0 TDC / Top dead center.
At zero. Tdc ( top dead center )
ZERO TDC / Top Dead Center
That year sets at ZERO TDC.
0 TDC / Top dead center.
0 degrees at TDC./ TOP DEAD CENTER.
if it has an automatic its 4 degrees before tdc, with the vaccuum advance off and plugged
4 BEFORE (ADVANCED) TDC A 800 RPM WITH THE VACUME ADVANCE DISCONNECTED AND PLUGGED.
No. When the timing mark is at tdc, #'s 1 & 6 are both up. One is up for compression, the other is up for exhaust.
I know the timing is 6 degrees Before TDC but I don't know what the idle RPM is.. I'm trying to find that myself right now...
When the engine is at #1 TDC, the dot on the crankshaft sprocket is at 12 o'clock, and the dot on the cam sprocket is at 6 o'clock.
what is the timing on a chevy 350 It depends on the compression ratio and the quality of the fuel, but 8 degrees before TDC is a good place to start. Then try increasing 1 or 2 degrees at a time until you notice pinging or it's hard to start when hot.
That would be to the left of the timing pointer Or left of ZERO TDC
0 degrees at TDC.
Is there a manual to rebuild a 350 turbo transmission on a 1977 Chevy Truck on line that I can order or down load for free I think if you got to Chevy truck parts .com you can find one
You can find a Chevy 350 engine for sale at a car parts shop. You may also look for the engine online. There are many different places in which one could find this item online.
Take the old one with you.