* Lifters (Hydraulic or Mechanical): This is a very common cause of clicking. Worn or failing lifters don't pump up properly, leading to a clicking sound as the valve train operates. This is often more pronounced when the engine is cold and can lessen as it warms up.
* Valves: A sticking or burnt valve can also produce a clicking noise.
* Pushrods (If applicable): Bent, worn, or loose pushrods are another potential source, especially in engines with a pushrod-operated valve train (which the Brougham's likely has).
* Timing Chain/Belt: A worn or loose timing chain or belt (depending on the engine) can cause a clicking, though this is often more of a rattling sound.
* Spark Plugs/Wires: A loose or faulty spark plug wire can sometimes create a clicking sound, though it's usually more of a snapping or crackling sound and often accompanied by misfiring.
* Fuel Injectors: While less common to present as a simple click, a failing injector might make a clicking sound.
* Distributor (if equipped): Older engines with distributors can have clicking issues related to the points, condenser, or rotor. The Brougham's engine might use a distributor depending on the specific engine.
* Alternator/Starter: These components are less likely to cause a clicking sound *within* the engine but could be mistaken for such. A clicking starter is usually more pronounced when trying to start the car.
To diagnose the problem:
You need to investigate further. Consider:
* The location of the click: Is it near the front, back, top, or sides of the engine? This can help narrow down the possibilities.
* The frequency: Is it a consistent click, or does it vary with engine speed?
* When does it occur?: Is it only when the engine is cold, hot, or under load?
* Any other symptoms?: Is the car misfiring, running roughly, losing power, or consuming excessive oil?
Ideally, take your Cadillac to a mechanic for a proper diagnosis. Trying to fix this yourself without the proper knowledge and tools could lead to more serious damage. The information above should help you explain the problem to the mechanic, however.
