Sunday 10 April 2011

john daniel 4843

What is the purpose of the crankshaft,camshaft,valves collects(keepers),valve stem seals,head gasket,pistons,piston rings name them all, cam belt,flywheel?


Crankshaft - This is the heart of the engine. This is what spins and provides the motion for all the other parts in the engine con-rods, pistons, transmission, etc. All other parts in the engine work toward getting the crankshaft to turn fast and powerful.

Camshaft - A part of the short block, the cam is responsible for timing the opening and closing of the valves as well as determining how far they open up.

Keeper - These are little tapered half-round parts which lock onto the valve stem by the grooves. The outer diameter of the keeper is tapered. This in turn locks into the retainer which holds the valve spring in place.

Piston - The part which compresses the combustion fuel/air mixture in the cylinder on the compression stroke. Pistons come in 3 basic flavors; domed top (high CR), flat top (standard CR) and dished top (low CR).

Piston Rings - These provide a good seal between the piston and the cylinders wall. There are 2 top rings, or compression rings. The bottom ring is actually in 3 pieces (2 rings and a spacer). This is your oil control ring.


Head Gasket - A round copper ring that fits between the tops of the cylinders and the heads.

Flywheel - The large, heavy round plate which is held on the front of the engine with the gland nut. This is part of what couples the transmission to the engine. The clutch pressure plate mounts to the flywheel. The gear teeth on the outer edge are what the starter engages to start the engine.



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