Grandadbeard

Yes indeed;  actually the engine has been treated with the Forte engine flush, Oil drained, re-filled with new Oil with the Forte VVT special additive included.  But all to no avail - the problem remains.    Help please! 

I have a 2003 X350 4.2 V8 XJ.   It has done 99,000 miles.  When starting from cold, the engine emits a rattle, briefly.  Seems to be from the top of the engine, and lasts for only a second or two. It would appear to be caused by a shortage of Oil, because having run for even a short time, on next start-up it is perfectly ok.  Any experiences of this?  Any suggestions for cure?