J258RFJ: an expensive update

I just thought I’d share an update on all the work the Jag has had in recent months. I’d booked for it to come off the road at the start of April to have all of its bushes replaced as there was some creaking and groaning over bumps and the car wasn’t driving quite as we as it should. But just like when a dog knows its going to the vets and starts playing up, the day before the Jag was due to go into the workshop it started misfiring. As it turned out later the head gasket had blown (a pattern part that wasn’t as good as it needed to be).

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The blown head gasket

I had been hoping to avoid any engine work until passing the 200,000 mile barrier but obviously this development blew any chance of that and simultaneously increased the amount of time the car would be spending in the workshop. The head went away to be skimmed, as did the exhaust manifold, and the other work continued in the meantime. There was a small oil leak to take care of, and the front brake pads were also replaced, and of course all of those bushes needed to be replaced. This all adds up to quite an expensive bill reaching easily into four figures, but all of the work was necessary and none of it is altogether unusual for a car of this age and mileage. With a few parts supplier problems and other issues it was more than a month and a half before J258 was back on the road and I was certainly impatient to have it back by that time.

Getting the car back on the road was very much a mood lifter and though I was being gentle on the old girl it was easy to see just how much a difference all of that work had made. One thing that I’ve found surprises people is just how responsive an XJS is to being hustled down a B-road. They’re certainly not the smallest or lightest cars (or sportiest, for that matter), but they are relatively narrow and they handle well. My XJS is now feeling much tighter with those new bushes really making their presence known.

This engine work also provided an interesting experiment in regards to the fuel economy. I’ve never expected an XJS to be frugal, but this particular car always seemed to have poorer economy than other 4.0 cars (mine was getting between 9-10mpg on average and others seem to reliably get into the low 20s). In the 1,500 miles I covered after all of this work 15mpg was achieved without too much trouble, which is nice for added range if nothing else. It also makes me curious to see what the actual fuel economy of the 6.5l XJ-S is…..and there is only one person to blame with what has become a new obsession in tracking that sort of thing.

There are no other plans for major overhauls in the next few months so hopefully any further updates will just include lots of driving, and maybe even cracking that 200,000 mile barrier too.

J258RFJ: an update

I thought I would continue writing some blog posts about my own XJS and all about owning one (both the good and the bad). At the moment the car is sat up in our workshop with a mystery fuel leak that will require the fuel tank to come out and the oil leak is also still present after the rocker cover gasket was replaced. I’ve also decided to have the car serviced since it doesn’t appear a service has been completed on the car since last 2015. The car is up on a ramp but waiting behind a few, more pressing jobs so it could take a while before it is back on the road. I did manage to break the mounting for one of the chrome trim pieces on the boot but that is all sorted now.

With the bad stuff out of the way, I can say that I’ve been enjoying using the car more and more, even if driving one of the V12s the other day did make me want a little more power. When the fuel level isn’t dropping like a stone because of a fuel leak the car doesn’t do too badly on fuel, 16-18mpg can be achieved easily. I know that doesn’t sound like a lot but it is the better part of 30 years old, heavy and with a big engine, so you couldn’t really expect much else. I also discovered that the ‘sport’ mode that I thought didn’t do anything actually does have an effect. It holds the gears until the needle goes right around the clock rather than stopping half way and helps to transform the car into a somewhat fast car. I spoke to an engine builder I know (before I bought the car) who told me that he used to supercharge 4.0 manual XJS when they were new and they produced as much as 420Nm, which is pretty impressive and I wish I could have a go in one. I wasn’t sure that I wanted an automatic car simply because I prefer a manual car and it adds to the driving experience in these especially, but I am actually enjoying the auto box in this one and is perfect for cruising around when you’re not really driving for driving’s sake. Hopefully the car will be back on the road soon and I can give you another update (before it probably develops another issue).