Robbie said:
The 4.2l 6 cylinder cars got a borg warner 3 speed. the 12's got the th400 (but with a jag-specific bellhousing).
and of course I have pondered MS conversions and the like, but initially the goal would be to stay original as much as possible (remember not making it a project).
The fact that you are aware of those details puts you ahead of most. Indicates you might be a potentially good owner. The stock electrical parts are really reliable, much more so than their reputation, Switching to a MS system can only be justified if you don’t have a spare or want to race the car. Somehow having spares handy keeps the original reliable.
The number one item I see happen to those cars is the tank selector gets stuck on the empty side. It’s not difficult if you know what you’re looking for.
The second most common problem is loose or poor ground connections. Those can be a real nightmare to sort out if electric work bothers you. Often people start replacing the whole harness and never get it back together.
People talk about the difficulty of working on the rear brakes. I’ll admit it’s not for the faint at heart. The first time, however with experience it can be done in a morning.
Harder still is doing a valve adjustment. The right tools ( not expensive ) knowledge, and a great collection of shims makes it possible. I would strongly advise watching someone first. Very easy to make serious mistakes. Oh and don’t be obsessive around that period the factory’s equipment was well, tired. They’d been using it since the 1940’s
Ticking on turn over is common and not a matter that adjustment is likely to fix. However it is possible that the problem is the Iron sleeve the lifter slides up and down in is loose. That is a relatively simple repair. Don’t be afraid to remove the valve covers to check.
Do listen carefully to the timing chains. I have a stethoscope with a long pickup that is perfect to identify the sound of worn chains. I have used a long rod held against my ear with acceptable results. Running the engine low on oil wears chains quickly. Good likelihood if chains are worn so are the sprockets and now you are spending serious money for parts.
One honest bit of advice I always give potential owners is if you buy one,••••• buy a spares source. I watch the various sites like Insurance sales and Craigslist with a sharp eye for a wreck/ rusty/ not running that is $500 or less. In a relatively short period of time I can remove anything of value and bring the remaining hulk to the scrap yard for most of my money back.
That collection of parts proves well worth your time. ( and peace of mind). Transmission dies? No worries you’ve got a spare or two ( don’t worry that Borg Warner is plenty rugged ) the temptation once your spares pile gets a little low either through use or trading, is to buy another, just don’t use too much space to do so though.
Along those lines, join your local Jaguar Club. The meetings can be a pleasant way to spend an evening, plus they are always going on outings, garage tours, dinners, etc.
Its also good to know the few guys who really enjoy the hobby. Source of parts, knowledge which shops to work with and which to avoid etc.