Citroen XM Forum

Good news.

What are you doing with the rest of the car. I'm hoping it was a battered Series 2.

Hello, Orga 5446, i.e. Oct/91 was the first ZPJ4 which got ceramic tappets. A Dutch experts gives Orga 5454.

ORGA 5446 is the date of completion of the first production car with a factory built ceramic tappet engine fitted.
Engine number of last non ceramic ex factory engine 10FV973434.
Engines from ORGA 5106 had been fitted with aluminum inlet rockers and modified cams.
The wear on the previous steel rockers was believed to be due to oil starvation during running in.
These modified camshafts are marked with "X" on the end.
First production car with this modified 1FV43 engine was completed on ORGA 5163.
Prior to this (engine 2364) smaller balance shaft bearings had been fitted.

Quite a few incompatible parts changes had been made, one Operation "NESTOR" involving car recall.
The rate of engine failures in the earlier cars put pressure on dealers.
An exchange engine programme was then started using new then factory rebuilt engines.
As a result many of these ailing early cars got engine swaps rather than dealer rebuilds.
So ORGA and engine number may well not indicated actual engine parts fitted.
These engines need careful examination to determine what is fitted.

John