minor or major
When overhauling an engine, you need to consider the condition of the engine block, heads, crank, and camshaft. Any of these may need resurfacing or replacing, and the cost may be high enough to look at a complete replacement engine.
It is required with some engines.
Take the engine apart. There is no reason to replace the chains unless you are overhauling the engine, normally.
Typically the two types of engines deployed in the modern hybrid car is a small gasoline engine combined with an electric engine.
There are basically two types of spark ignition engine. They are the diesel spark engines and the petrol spark engines.
internal and external combustion engine
The two types of mechanical engine are reciprocating and rotary. They can also be internal or external combustion. These can be further sub-divided.
A two stroke engine has half the strokes of an otto (or four stroke) engine, therefore it takes two crankshaft roatations to complete a cycle on a four stroke engine and only one revolution in a two stroke engine. There are several types of two stroke engines, the different types have to do with how the receive the air/fuel mixture, also you have two stroke diesel engines.
If I were overhauling this engine, I would replace the head bolts with new ones. Money well spent.
maybe bec. theres two types of i.c.e. the gasoline and diesel ingine
"Renovating" or perhaps "overhauling".