Whatever is the culprit, get your car seen to quickly to avoid being stranded on the side of the road.
Knock, knock. Who’s there? Engine trouble. Engine trouble who? Wait, I have engine trouble??? Yes, if you’re hearing knocking, you very well could.
Knocking coming from the engine is one of the worst sounds your vehicle can make. This is because if it’s knocking, there is something serious going on under the hood. If you have a deeper and more prominent knock, it’s likely that you need a rod bearing replaced. This is a big job, with a big bill. Similarly, if it’s something like a spun bearing, this requires pulling the entire powertrain and lower end of your vehicle off. Which also results in a massive repair bill comprised mostly of labour costs.
It could however, also be caused by an ignition issue, fuel injectors, damaged spark plugs, or faulty distributor caps. If you’re noticing the knocking is most prevalent when accelerating, definitely advise your mechanic of this. It will help to diagnose the issue faster, as this usually signals that a lifter isn’t lifting.
Squealing isn’t necessarily a sign of something extremely bad to happen with a vehicle. However, it does indicate that you need to have your car serviced at the very least. If you’re hearing squealing, it could be time for a brake job.