* Belt(s): This is the most likely culprit. The serpentine belt (or multiple belts) drives many accessories like the alternator, power steering pump, and air conditioning compressor. A worn, loose, or misaligned belt will squeak loudly and can overheat, potentially causing it to melt or break. The smell could be burning rubber.
* Alternator: A failing alternator can overheat and produce a burning smell. While a squeak isn't as common with an alternator, it's possible if a pulley bearing is failing.
* Power Steering Pump: Similar to the alternator, a failing power steering pump can squeak, overheat, and smell burnt. Low power steering fluid can also exacerbate this.
* Water Pump: While less likely to squeak, a failing water pump bearing can make noise and overheating could create a burning smell, especially if it's leaking coolant.
* Brake System: While less likely to produce a strong hot smell unless there's a significant issue like a seized caliper, a squeak could indicate brake pad wear or a problem with the caliper itself.
What to do:
1. Pull over safely immediately: Driving with a hot smell and squeaking noise is dangerous. Overheating components can cause fires or catastrophic failures.
2. Turn off the engine: Let the car cool down before attempting any inspection.
3. Visually inspect: Carefully examine the engine bay for any obvious issues, paying close attention to belts, the alternator, power steering pump, and other moving parts. Look for anything visibly damaged, loose, or leaking.
4. Check fluid levels: Check your power steering fluid, coolant, and engine oil levels. Low fluid could indicate a leak.
5. DO NOT attempt repairs yourself unless you are experienced: Jaguar XKRs are complex vehicles. Incorrect repairs could worsen the problem or cause further damage.
6. Call a tow truck: Have your car towed to a qualified mechanic or Jaguar specialist. Describing the sounds and smells will help them diagnose the problem more efficiently.
Ignoring the issue could lead to much more expensive repairs later. It's best to get it checked immediately.
