What are the piston numbers on a 2001 3.3 liter engine? Want to know where #1 is etc.

Number 1 is closest to the front of the engine. The front has all the pulleys and the serpentine belt.

You need to lower subframe and pull motor from top. Not easy job I done a few and I hate working on that car. I suggest selling car

number 1 piston should be at top dead center. remove the number 1 plug and insert a straw, or a soft object in hole on top of piston. this way when it is all the way up and just before it starts to go down you will know. if it has a dist. make sure rotor button is facing number 1 plug wire. good-day !

The left (drivers) side cylinder head is numbered from front (radiator)
1-3-5-7

The right (passenger) side cylinder head is numbered from front
2-4-6-8

per 2001 Toyota repair manual page EM-103 and 105. The numbers are not on the engine, from what I can see, but the manual is very specific on this info.
2001 Toyota Tundra Access Cab SR5 2WD
4.7 liter DOHC V-8 (2UZ-FE) 2001 Toyota Tundra Access Cab SR5 2WD
3.4 liter DOHC V-6 (5VZ-FE)
http://autorepair.about.com/library/firing_orders/bl-toyota-firing-01.htm

remove No. 4 plug add teaspoon of engine oil, compression test if compression rises 120 psi plus, points to broken piston rings, below 90 psi burnt or stuck exhaust valve.

4.3 liter, right? I think you have it right--see pic below. So it cranks but no fire happening? Did you check firing order, etc.? Getting sparks? Fuel pump coming on? Injectors firing? If you had the engine out of the car, make sure you got all the ground wires back in place, etc.

Your number one cylinder is always the front most piston, usually left front of the engine. If you follow the wire back to the coil pack or dist, whatever you have, you will have the number one, then you know the order, just go by it, and it should give you the rest of the pistons. A V6 sometimes goes, 123 on the left, and 456 on the right, but not always. They can cross over, left, right, etc. The 4 cylinder overhead cam engine is 1234, the firing order is cast into the engine block on all engines. I don't know what engine you have , but hope this helps.

firing order piston number (1-2-4-3) clockwise at distributor
at the engine from right 1st piston =piston number one
the engine from right second piston =piston number two
the engine from right 3rd =piston number three
the engine from right 4 =piston number four

2001 Mercury Grand Marquis 4.6 liter V-8 VIN "9"



2001 Mercury Grand Marquis 4.6 liter V-8 VIN "W"



Hope helped (remember rated this).

The engine number location depends on engine type.
1. For 2001 VW Golf 1.6 liters 16V engine:

2. For 2001 VW Golf 1.8 liters 20V engine:

3. For 2001 VW Golf 2.0 liters engine:

4. For 2001 VW Golf 2.3 liters engine:

5. For 2001 VW Golf 1.9 TDI-PD engine: