Hello to you in Vancouver.
Not long ago on Vacation from England I drove from Calgary to Vancouver taking in Jasper and Banff in a Chevvy trail blazer then sailed the inner passage stopping at Jenau and Skagway and many more on the NCL norwegian sun. Happy times.
Anyway, I digress,....Has he got the belt 1 tooth out? if so your in big trouble matey as the noise may well be the pistons contacting the valves. Its been done before MANY TIMES. Does the vehicle seem to have more or less power than it did? Another sure sign of being 1 tooth out as valves are not closing opening when they should in relation to crank position.
I hope its not this but, only other explanation is he has not fitted a cover or something back properly and its fouling on some rotating part
Gool Luck
Al.
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