2003 Jaguar XJ8 over heating

2003 JAGUAR XJ8
21,748 MILES • V8 • AWD • AUTOMATIC
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ABJAGUAR
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Jaguar 2003 xj8 used only 21700 mile get over heated , it was suposed to use unleaded feul but we use leaded feul , now the engine get over heated after 7miles drive
water collant is full, and one mechanic advice to change the exhust and I did but the problim still as its , when I change from low speed to high speed at ones blue smoke go out (( is this normal)) any advice what I can do for it
Sep 11, 2008 at 3:45 PM
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DAVE H
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have the cylinders compression tested
Dec 31, 2009 at 9:17 AM