A while ago I asked for suggestions about what might have suddenly started
causing me trouble when starting my Disco 300Tdi from cold. (It started
perfectly when hot.)
Lots of helpful tips came in about ways to check the glow plug system,
including the relay.
Some people suggested we look more broadly and consider the fuel system.
I came to suspect the fuel system - and learned that sometimes the o-ring on
the sedimenter can twist, causing leaks, and that the fuel tank sender can
rust (along with the boot floor) allowing air in without neccessarily
showing fuel. [Mine had rusted a lot, but changing it didn't fix the
But it was none of these things. And I'm damn glad I finally found the
Turns out the back of the system holding the TIMING BELT is out of
alignment, and my belt - at just 45,000 miles old! - had almost broken up.
The timing was out by one or two teeth. I was amazed that this seemed to be
sensitive to whether the engine had recently been running - but it was.
Thought you'd like to know since it was the LAST thing I checked :(
Thanks again for all the advice previously.
(and hard-worked 300Tdi Disco)