As I said elsewhere I was told yesterday that the old gal is "smoking" a bit on hard acceleration or sudden foot off the gas.
I popped the plugs out just now and bar just the one they all look perfect. Yesterday's trip was 76 miles and I really gave it a good thrashing at 70MPH on the Dual carriageways.

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1,2 & 4 are lovely and white and clean but #3 is a bit oily and dirty. I suspect we have some issue with Cyl #3.
I will do a compression test and go from there.
I tried revving up from a cold start to see if I got any smoke out the back, but there wasn't any.
Maybe when it gets hot the valve stem seals on #3 let by, who knows?
There is a burnt oil smell in the cab when you are really gunning it, but nothing is visible in the rear-view mirror.
 

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