3TNE66 3TNE68 Used Engine Heads For Excavator PC15 PC18 119265 -
11700
Specification
| Type: Engine cylinder head | Model Number: 3TNE66 |
| Application: Excavator | Part number: 119265 - 11700 |
| Type: Eddy injection | valve: 6 valve |
| Car model: Yanmar | Number of Cylinders: 3 |
Description
Types Of Cylinder Heads
Flathead Cylinder Heads: These were the first type of cylinder
heads. Flathead cylinder heads simply protect the cylinder block
and have no moving parts. These cylinder heads do not allow for an
efficient air flow, and thereby provide a poor engine performance.
Overhead Valve Cylinder Heads: These cylinders heads are superior
to flathead cylinder heads. Overhead valve cylinder heads have the
camshafts above them. These heads have their pushrods and valves
connected to provide a smooth airflow.
Overhead Camshaft Cylinder Heads: These are the most advanced
designs of cylinder heads. Overhead camshaft cylinder heads have
the camshafts inside the cylinder head, eliminating the need of
pushrods. This provides a better airflow, and in turn, increases
the efficiency of the engine.
Why Do Cylinder Heads Fail?
The most common reason for cylinder head failure is overheating
caused by, for example, coolant loss, head gasket failure, or
restricted flow of coolant.
In extreme cases, a cracked or damaged cylinder head can result in
terminal damage to the entire engine! You must deal with any
problems as soon as possible to try and prevent this from
happening.
Cylinder heads can also warp because of the tremendous pressure
placed on them by extreme temperature changes. This means that it
is no longer providing a flat surface to hold the head gasket in
the right position, which can lead to expensive problems later on
in the form of major repairs or total engine replacement being
required.
Warping is a particular problem for cylinder heads made of
aluminum. Different engines have different levels of tolerance for
cylinder head warping – some can withstand a high amount of warping
while still working effectively. If your cylinder head does warp,
you may be able to take it to a mechanic who specializes in
realigning them – if not, you will probably need a replacement.
