as Frank said, there is no need to be obsessive, if you had a chance to
observe the car over a certain period of time - and did so! If it runs
and drives fine for one hour give city take motorway, it will do the
same thing for many hours. These cars were designed to cover large
distances. Your cat will feel a lot better with one 1000 km-trip than
with 1000 1 km rides to the letter box.
The stock XK engine design is probably not fully WOT proof, but it’ll
stand at least many minutes of full speed without anything discomforting
but the rapid decline of the fuel needle - I tested this;-). At anything
up to 140-160 kph the car can go for ages.
If you want to cross the Death Valley, double-checking the cooling makes
perfect sense, likewise if you have mountain ranges to cross, but had
the car only in city traffic so far, I’d go over the brakes as well. You
might wish to check the age of the brake fluid and change, if necessary.
For the trip take a full tool set, the ROM, duct tape, two coat hangers
with pliers and a full assortment of fuses with you. If you’re really
paranoid add a dizzy cap and a set of coolant hoses. Nothing will happen
Ah …, don’t forget AAA (or equivalent) membership card, cellphone and
a laptop computer
Good luck and keep us posted from your trip - are you going south from
75 XJ6L 4.2 auto (UK spec) - did the first trip over 400 km autobahn @
approx. 140 kph with four-year-old son on baby seatDate: Sat, 2 Jun 2012 16:08:30 -0700
From: "Adam XJ6"firstname.lastname@example.org
Subject: Re: [xj] Cooling System Pressure
In reply to a message from Frank Andersen sent Fri 1 Jun 2012:
Thanks Al and Frank!
I was hoping I would get this answer that all seems well.
I’m preparing for a long road trip in a few weeks since i’m
moving back home after many years abroad and of couse i’m
taking the XJ with me. Since its a 1,000 km (621 miles) I’m
double checking everything on the car before I set off.
I’m planning of starting a topic later with preparing 30
year old cars for a long drive. I’m starting to think that I
have a better check and knowledge of all the parts on my old
XJ compared to many friends 2 or 3 year old cars. Maybe its
an obsessive hobby but I wouldn’t want serious to go wrong
on the trip.
An infrared thermometer is on my wish list of tools but I
did use a high temperature thermometer last year which I
built into an old radiator cap and it confirmed that when
the needle is in the middle of the ‘‘normal’’ part of the
scale, the coolant is between 82 and 84 degrees Celsius.
Which corresponds to my thermostat.
The original message included these comments:
That depends on the hose, Adam - but most hoses will feel ‘softer’ when
As Al says, all correct and basically nothing really to worry about. Any
leaks will depressurize the system - best verified by regularely
checking expansion tank with the engine cold; any gradual drop in level
will then indicate a leak. One can also check for leaks with pressure
test equipent, but there is no ‘safe’ way of verifying that there is
pressure with the engine hot - opening the cap with a hot engine is a
As Al also says; an infrared thermometer is a valid investment - though
there are no indications you have a problem…time may come. But at
Jaguar XJ6 4.2 Series 2 Jessie
Den Haag, Netherlands
The archives and FAQ will answer many queries on the XJ series…
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