Further planned modifications, such as new cylinder blocks, were not carried out.
The oil pressure switch was now located at the rear of the cylinder block.
So so what do you make the cylinder block out of?
The 198 gave better performance than the 170, and was less costly to make, since it used the same cylinder block as the 225.
The cylinder block was redesigned for use with a balance shaft.
In 1989 there was a redesign of the 2.5 to permit both it and the 2.2 to use a common cylinder block.
However the material of both cylinder block and head was now aluminium.
The water pump housing is cast integral with the cylinder block.
Engine output is taken from the rotation of one cylinder block.
At the very least, the cylinder block will be used, as may most other parts.