What is the Top End? The Top End is where the chemical energy of the fuel (gasoline) is converted into the kinetic energy that drives the motorcycle. The Top End contains two main parts, the engine head and the barrel.
What does top end and bottom end mean?
The top end refers to the “top” of the engine. Typically that means putting a new piston in and cleaning everything up. This is less work and is done more often, whereas a bottom end job tears the engine down to the crankshaft and inspects the entire engine.
What does rebuilding top end mean?
Top end rebuild means just the heads. It means valve guides, check/replace valves, and valve springs. There are Piston, cylinders, rings, crank bearings and so on. … The passages in the head and the cylinder head housing are usually cleared out on the 993.
How much does it cost to rebuild an engine top end?
A typical engine rebuild is between $2,500 and $4,000 in parts and labor costs. This type of engine repair might include simply replacing bearings and seals, and obviously taking the engine out and re-installing it. It could be much higher too.
What is the difference between top end and bottom end power?
Bottem end power is the motors capability to produce power at a low rpm or the torque the motors putting out. Then the top end is pretty much how much power the motor can still make at the red line or if the motor is still producing horse power while it’s screaming.
How do I know if my engine needs to be rebuilt?
3 Signs you may need an Engine Rebuild
- Banging or Knocking Sound. An engine’s moving parts rest on engine bearings. …
- White Exhaust. If oil burns with gasoline it will cause your exhaust smoke to be a very white color. …
- Metal Flakes in Engine Oil.
How do you tell if you need a top end rebuild?
When you see dirt in the intake, you’ll need to tear down the top end to check for damage. A damaged cylinder may need reconditioning or replating. The same goes for when you find your intake boot and airbox was not sealed properly. Anytime you find leaks, you’ll want to tear down and inspect for damage.
How do you know when you need a bottom end rebuild?
Engine vibration is an indicator that the bottom end needs to be rebuilt. Checking for excess “play” in the crank with the top-end off is a sure way to tell. If there’s up and down play or a lot of side to side play, the crank bearings are more than likely worn out at a minimum.
What is the top half of an engine called?
Essentially the top-end is comprised of the cylinder head, or heads, with the valve train and the camshaft/s. We will break down the internal components of the cylinder head assembly, as well as explain two different cylinder head designs; the overhead valve and the overhead cam.
What is the front end of an engine?
the “rear” of the engine? On my vehicle, from the context of part names, the “front” is the side with the timing belt and the other belts, the alternator, compressor, p/s pump. The “rear” is the side with the flywheel, clutch, transmission, VTEC solenoid (it’s a Honda).