Can a sae-4340 crankshaft survive a cup engine?

More than one crankshaft manufacturer has told me that there is no way that a forging from the commonly used steel alloy SAE-4340 (AMS-6414) would survive in one of today’s Cup engines.

How are gears connected to the timing chain?

Locate marks on your crankshaft and camshaft gears. These gears are connected by the timing chain so that the position of the piston (connected to the crankshaft) correlates directly to the opening of the fuel and exhaust valves (operated by the camshaft) to keep your engine running smoothly.

Do you need an owner’s manual to change a timing chain?

Locate your owner’s manual. You will most likely need it to disassemble and reassemble various parts. Also verify that your model is equipped with a timing chain and not a timing belt. These two parts perform the same task, but replacing them can be quite different. This procedure is only for replacing a timing chain.

Where are the counterweights on a V8 crankshaft?

Figure 2 shows a single-plane V8 crankshaft, in which the counterweights are directly opposite their associated rod journal. A fully-counterweighted inline-4 cylinder engine has a similar layout. However, the counterweights are not always directly opposite the rod journals.

What happens to a crankshaft when the belt is off?

When the belt is off, there is no defined stroke. A stroke is defined by the direction of movement of the crankshaft in relation to the position of the valves. Since the valves are not being actuated because the belt has been removed, the stroke is not defined. You can remove the spark plugs, that will make rotating the crankshaft pretty easy.

How often do crankshafts need to be lined up?

The crankshaft turns two times for every one turn of the camshafts. However, both camshafts need to be lined up with the timing marks as well as the crankshaft turned to TDC before you install the belt to keep everything lined up correctly.

How many times does the crankshaft turn for each stroke?

I.e. go through each stroke for each piston until the camshaft timing markings align. Remember belt is already removed. If that isn’t the case it seems I must simply force the camshafts to move past the spring resistance. As Caddyman said, there is not ‘wrong stroke’. The crankshaft turns two times for every one turn of the camshafts.

When to set the cams on a crankshaft?

I would suggest at this point in time that you start with the crankshaft at 30° before top dead center and set the cams. At this point, there will be plenty of clearance for valve in every cylinder. When the cams are in position, then rotate the crankshaft to TDC and install the belt.