yea i just did mine in about an hour flat, propped the car up so the drivers wheel was off the ground, and my engine sounds brand new. well, it is, but now at least it doesnt sound like a diesel. as long as you rotate the crank so every piston is TDC and go in the 1-3-4-2 firing order, youll be fine. but if you didnt know that stuff, like dave said, get a professional