XJS inspection advice

Luckily the V12 is virtually indestructible and contrary to popular belief, not that bad to work on.

Its biggest weakness seems to be oil leaks and over heating, so make sure you have a really good luck underneath, particularly where the engine and gearbox meet as the rear crank seal wont be pleasant to change (Engine and Gearbox out).

Make sure it gets nice and hot and the temp gauge should stay in the Normal, anything going towards the top could spell radiator trouble - Nothing serious to change though.

With the engine cold the oil pressure should be about 50 lbs, and hot at idle about 15 - 20 lbs. Make sure that the gauge goes up when you rev the hot engine.

One of the other problems that I have heard of happening a lot is a sticking auxiliary air valve. The symptoms are the revs bounce between 400 and 1400 revs as the engine warms up, but it runs fine once warm. These are expensive at dealers but there are plenty around 2nd hand and they are really easy to change.

So in summary, make sure you start the engine from cold (Its a common scam to warm the engine up when a buyer comes), check for oil leaks, oil pressure and temperature.

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WayneC
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