Cabeçotes e peças para Jaguar S-Type

Cylinder Heads & Parts for Jaguar S-Type

Cylinder heads are an integral part of your Jaguar S-Type vehicle; without properly functioning heads, your car will not achieve the performance or fuel economy that it should. Like all other parts of an engine, heads are under a great deal of stress, and this stress can sometimes lead to damage, such as cracking, warping, or even penetration of the head by moving engine components. Keeping the heads on your Jaguar S -Type in optimal working order at all times is important for its smooth functioning and good performance.

Will one set of heads fit all Jaguar S-Types?

Jaguar S-Types came with a wide range of motors. Because every motor with different displacement is a different size, even those with the same number of cylinders will have different heads that are specific to that model of engine. Here are some of the engines that were routinely put into Jaguar S-Types.

  • The 2.5-liter V6.
  • The 2.7-liter turbo diesel.
  • The 3.0-liter V6.
  • The 4.0-liter V8.
  • The 4.2-liter turbocharged V8.

It is essential that you identify which one of these motors is installed in your Jaguar S-Type. Heads will fit only the motor for which they were designed.

Will replacing the heads on your Jaguar S-Type improve performance?

If you are currently driving a Jaguar with compromised or cracked heads, it is likely that the performance of your car is being significantly affected. Some models of the S-Type are rated at up to 26 mpg on the highway. It is possible that even a hairline crack in a head could diminish the fuel economy by 10 miles per gallon or more. This is especially true on a modern Jaguar, which is heavily controlled by computers. The car will automatically switch into whats referred to as limp mode, often dramatically reducing gas mileage to put as little strain as possible on the motor until it can be serviced.

Another serious problem with compromised Jaguar heads is the loss of horsepower. Even the North American base model S-Type has 243 horsepower. This number will likely be sharply reduced if only one of the heads is compromised. As a result of these considerations, it is very likely that you will notice a significant performance increase when swapping out a bad head for a good one.

How do you know if the head needs replacement?

Knowing if a head is bad is a tricky thing to ascertain. If you are mechanically competent enough to swap out your own heads — a job that requires considerable skill — you probably already have the expertise to know if it is bad. Nevertheless, some signs of a bad head may include:

  • A stumbling or vibrating motor, especially at idle.
  • Heavy, white smoke exiting the tailpipe.
  • Overheating.
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