In message <email@example.com>
"Hugh Hogan" <firstname.lastname@example.org> wrote:
> Hi all
> I have a 98 Discovery with a 300 TDi engine in it. It has 111000 miles
> on it and was well serviced by reputable main dealer. Today having
> driven 200 Motorway miles at 60 70ish I noticed that there was a
> distinct ticking noise that varied with the engine speed coming from
> what I think is the rear of the block. It sounds like what the tappets
> on the old OHC Cortina would sound like if it had cam problems. It is
> much more pronounced when the engine is cold and not bad at all when
> Any suggestions and are there any web sites that might teach me how
> diesel engines work so as i dont need to ask silly questions like this
Obvously remote diagnosis is difficult, but a distinct "tick tick"
in time with the engine could be the head gasket, but then it could
be the vacuum pump, or an injector, or etc etc.
Run the engine with the oil filler cap off - does it "chuff" a bit?
That would indicate head gasket. You can often see soot marks
where it is blowing (if it is). An oily air filter is also another
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