Citroen ZX refrigeration

Thanks for answering.
How can I check the compression?

With a compression meter it would be ideal, if you do not take it to be checked in a workshop, there is another way but you need experience to be able to differ between the good compression and the one that is not, lifts a wheel of the vehicle, front if it is front traction tracer if it is a breast traction, remove all the spark plugs and put the cables where they should go, turn the wheel with the wheel with the wheel. You must save a bit to determine which are well and which are not.

To look at compression in a diesel engine, you take out an injector, place a pressure gauge in its place and give it to start. You will check the maximum pressure peak and you would only have to compare that data with that of the manufacturer.

Greetings.