1979 Jaguar XJ6 Series 3 4.2 litre FI 6 cylinder from North America
Lovely car - we've owned it for 31 years of reliable motoring, and are not planning to sell it
At about 245,000 miles, the oil pressure was starting to fade. I dropped the sump off the engine, mic'd the big end journals, found about one-quarter thou wear from factory specs. Put in new standard main and rod bearing shells, plus a new oil pump. Oil pressure has been factory+ since then.
Had the radiator re-cored at about 255,000 miles - used a 'dimple tube' core, which has proven incredibly effective. Rock steady coolant temperature on 100+ degree F days in traffic.
Replaced the water pump at about 280,000 miles.
As far as I know, the head has never been off the engine, but valve clearances are checked regularly.
Maintenance would appear to be the key - regular oil changes with good quality oil - used to use Castrol GTX, but am worried now about lack of ZDDP additive. I have found that every 5,000 miles oil and filter works - witness the miles. If a little something goes wrong, attend to it at once - you will be much happier.
The car is a delight to drive with a smooth ride, excellent predictable handling for its size and not unreasonable fuel consumption for its weight. (We have an E-Type and a Lotus Elan in our fleet, and I used to race Formula Fords, so appreciate handling.) Great on open country roads - a bit wasted on freeways, but still very comfortable.
Incredible value for money, especially if you don't mind working on the car yourself. It has quite a lot of components, but the design is not really complex and parts are surprisingly affordable and available.
Next major job: it is getting a Jaguar 4 speed overdrive manual transmission.
Would you buy another car from this manufacturer? Yes
Review Date: 4th April, 2010