Driving to town today, my beloved 'trak was, I noticed, running a wee bit hotter than normal, but I wasn't too concerned as the weather's been warm of late. Soon after she gave a sort of cough & started to run "unhappily". I pulled over, stopped the engine, waited a few seconds then started up again. Started fine, ran fine applying a bit of throttle...foot off the gas & the idle speed dropped below normal & she ran rough & spluttered.
Started again, & this time an ominous rattling from somewhere below.
At this point I phoned my mate who's a mechanic & he came out & listened. Couldn't discern what the problem was, as there was plenty of oil, no lack of water, no oil in the water, no visible leaks from the block, etc, etc.
Started her up one more time, only to hear the ominous rattle again, after which she shuddered to a stop & wouldn't start again.
I'm stumped; he's stumped; any thoughts?