What causes the XJ-S cooling system to overheat?
Check the radiator for blockage or sludge. Crud in the system will cause overheating under all conditions, but usually more at speed than at idle. Suspend the thermostats in a pan of water on the stove and bring them to a boil. Do not let them contact the bottom of the pan.
What causes a coolant leak in a Jaguar?
A coolant leak is a typical issue that can plague your car and cause all sorts of problems throughout your Jaguar if left unattended so it’s important to seek out the help of a Jaguar mechanic as soon as you begin to notice a potential leak.
What should I do if my Jaguar overheats?
A hard or expired rubber seal on the radiator caps or an under-rated (3 lb or 8 lb) pressure cap on the overflow tank.
How do you remove the radiator on a Jaguar XJ?
Use the drain cock to neatly drain the coolant into a container, and then remove the radiator hose to flush water through. Both the official Jaguar manual and the Haynes manual state that removing the radiator requires discharging the air conditioner freon circuit. They lie. In fact, as Jim Isbell reports,
What to do if your Jaguar radiator overheats?
Crud in the system will cause overheating under all conditions, but usually more at speed than at idle. Since Jaguar manuals recommend the use of Barrs Leaks, any radiator that has been maintained according to the manual is likely to be plugged. 2. Suspend the thermostats in a pan of water on the stove and bring them to a boil.
What happens when a Jaguar V12 engine overheats?
In any aluminum-block engine, severe overheating can result in a warped block or warped heads, which in turn normally call for an engine replacement. In the Jaguar V12, a more common symptom of an overheated engine is a dropped valve seat.
Can a Jaguar XJ-S have a cooling system?
In theory, leak sealers will not solidify until they come in contact with air; however, there is always a little air inside a cooling system, and in the case of the XJ-S there is apparently enough to cause trouble. Please, do not use any leak-sealing substance within the V12 cooling system.
A coolant leak is a typical issue that can plague your car and cause all sorts of problems throughout your Jaguar if left unattended so it’s important to seek out the help of a Jaguar mechanic as soon as you begin to notice a potential leak.