4D95 - 5 Diesel Used Engine Heads For Excavator PC130 - 8 6271 - 31
- 1110
Specification
| Item: Engine cylinder head |
| Engine Type: Diesel |
| Application: Excavator |
| Injection: Electric |
| valve: 8 valve |
| Cooling: Water Cooling |
| Number of Cylinders: 4 |
| Model: 4D95 - 5 |
Description
What Causes a Cracked Cylinder Head?
Overheating
Internal combustion engines heat up very quickly. As the name
implies, they are designed to contain small, controlled explosions.
Much of the energy in the combustion process is actually lost to
thermal energy, instead of being converted into kinetic energy to
power the vehicle. This is a byproduct of their design that can be
mitigated, but never eliminated entirely.
The number one cause of a cracked cylinder head is overheating.
When an engine overheats, its components may be stressed far beyond
the heat threshold it was designed to withstand.
Since most heads are made out of aluminum, they may warp or crack
when the engine gets hot enough.
An engine may overheat from a number of reasons, most of which are
due to a failed component in the cooling system. Some possible
causes are outlined below.
Coolant Leak
If too much coolant leaks out, eventually you won’t have enough to
properly cool the engine. You can lose a decent amount of coolant
before overheating, but it’s a good idea to regularly check the
overflow reservoir and radiator to make sure you’re topped off.
If you notice a coolant leak, it’s a great idea to check your
radiator cap. It’s a cheap part with some serious repercussions if
it fails. Keep in mind that not all coolant leaks are visible.
Cracked Cylinder Head Symptoms
Oil Leak
A cylinder head contains oil in it. If you have a cracked head, you
can expect oil to leak out of it. You should notice the oil light
on your dashboard turning on when this happens indicating a low oil
pressure.
If you see this light on, open your hood and try to see if there’s
engine oil near the cylinder head.
Sometimes oil will leak internally. When this happens, you won’t
notice a puddle of oil, but may see blue smoke out the exhaust.
