Your engine is both essential to keeping your car running and also not cheap to repair, so it’s a good idea not to brush off engine knocking as no big deal.
AAMCO Bay Area | 04. 07. 2021 | Problémy s autem
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You’re bound to hear a lot of different sounds over the life of your car. While some are normal, others can signal something more serious like a necessary engine repair. Unfortunately, sounds like engine knocking can mean problems that are causing serious engine damage. Your engine is both essential to keeping your car running and also not cheap to repair, so it’s a good idea not to brush off engine knocking as no big deal.
WHAT IS ENGINE KNOCKING?
If your engine is knocking, what you’re really hearing is fuel burning unevenly in your engine’s cylinders. With the proper balance of air and fuel, small pockets of fuel will burn one at a time so that they are spaced out evenly. When that balance is thrown off, the shock caused by those pockets of fuel being burned off at the wrong time causes a knocking sound and shudder, which in turn may potentially be damaging the engine cylinders.
THERE ARE A FEW POSSIBLE CAUSES FOR ENGINE KNOCKING
So improper ignition of the air-fuel mixture in your engine is to blame for that knocking sound. But what can cause that response in your car’s engine? There are a few possibilities – and luckily, you’re able to try some of them on your own without rushing to a mechanic. However, if you’ve experienced engine knocking for a while, it’s best to have a mechanic take a look to ensure more damage hasn’t already been done to your engine.
YOU NEED NEW SPARK PLUGS
Your car’s spark plugs are responsible for igniting the air-fuel mixture in your engine’s cylinders. If one or more of them are worn or have failed, that ignition won’t happen like it should. It’s totally normal for your spark plugs to wear out over time but it’s a good idea to keep up with replacing them before they fail to do their job.
Luckily, bringing your car in for a tune up service will take care of spark plug replacement. This is also an inexpensive car repair service, so it won’t add too much stress for you or your wallet. As a general rule, you should aim to replace your spark plugs about every 30,000 miles, though that timeframe depends on the type of spark plug being used.
YOU’RE USING THE WRONG TYPE OF FUEL
Each car comes with different fuel requirements. Some cars, in particular more sporty cars, have engines built for high-octane fuel. Take a look at your car’s owner’s manual and make sure you’re filling up with the right type of fuel. If your engine is built for high-octane fuel and you fill up with a lower-octane fuel, it can cause engine knocking. Prolonged use of the incorrect fuel type can also cause serious engine damage.
It may be tempting to save a buck at the gas pump by getting regular fuel instead of premium, if it’s not the right type of fuel for your car, it’s a bad idea. You’ll end up spending that money you saved on fuel on engine repairs instead.
YOU HAVE A BUILD UP OF CARBON DEPOSITS
Some carbon deposits will naturally form in the engine, despite American fuel including carbon-cleaning detergents to help prevent them. The more these deposits form, the more compression there will be for the air-fuel mixture in the engine’s cylinders. This can lead to engine knocking and can lead to engine cylinder damage.
Fortunately, a mechanic will be able to clean out those carbon deposits from your engine’s cylinders to get things back to normal again. It’s recommended that you or your mechanic regularly check for an excess of carbon deposits to head off engine knocking and the other damage it can cause, so don’t skimp on car inspections.
WHEN YOUR CAR SOUNDS LIKE IT’S KNOCKING, CALL AAMCO BAY AREA
Knock knock, who’s there? If your engine is knocking, bring it in to the expert mechanics at your nearest AAMCO Bay Area location. Don’t let an engine repair bring you down. The sooner you have the problem looked at by a mechanic, the less likely you are to deal with a serious repair that will take a bite out of your wallet. Whether you’re looking for regular maintenance to prevent engine knocking or are already experiencing it, give us a call.
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Související články
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Knocking is one of the many noises cars make when something isn’t right. There can be numerous causes, from low olej tlak na přenos problems, some of which are straightforward to fix. Others are, unfortunately, less so.
This guide explains the possible causes of your car’s knocking sound and suggests suitable repairs, including average prices where data is available.
Proč můj motor klepe?
A knocking sound from your car’s motor isn’t necessarily a sign of a serious problem; it could be something as simple as poor-quality fuel.
Most cars have a knock sensor engineered to pick up on any engine knocks, alerting the ECU to correct the issue. Thus, a knocking noise may result from a faulty knock sensor.
Engine knocking can also be caused by:
- Cambelt or chain issues
- Nízký tlak oleje
- Selhání zvedáku ventilu
- Staré zapalovací svíčky
- Špatné palivové čerpadlo
- Opotřebovaná ložiska
1. Worn cambelt
Projekt cambelt is a crucial component responsible for controlling the timing of the internal combustion engine. If it is too loose, damaged or worn, it can cause knocking sounds.
The cambelt should be replaced every 40,000 až 100,000 XNUMX mil — if your car is approaching this distance and you’ve yet to change your cambelt, this could explain the noise you’ve been experiencing. Find out what happens when your cambelt is replaced.
The average price of a cambelt replacement is £276.57, podle údajů WhoCanFixMyCar.
2. Nízký tlak oleje
When insufficient olej runs through the engine, components that rely on it for lubrication and protection are left exposed. Connecting rods begin to knock against each other, and if you continue driving, it will eventually cause damage to multiple engine parts.
Finding the right engine oil and topping it up is easy enough, but the low pressure indicates there may be a leak in the system. This guide discusses how to identify and fix various fluid leaks. If, after topping up the oil, you find it running low again quickly, this is a sure sign of a leak.
3. Valve lifter failure
A valve lifter is a cylinder that sits on the camshaft, transferring motions of the cam lobe through the pushrods and rockers to open and close the valves. Lifters can become clogged when your oil is too dirty or if it is the incorrect grade for your engine; when this happens, you may notice knocking sounds that persist after you have started the engine.
Running a cleaning agent through your engine may solve the problem if a dirt buildup has caused it. If not, contact a mechanic for an accurate price estimate.
4. Old spark plugs
Spark plugs are long-lasting, but eventually they wear out. Signs you need to replace them include:
When spark plugs don’t ignite the air-fuel mixture properly, it can cause knocking and misfiring, which sound similar. Your vehicle handbook contains information about how often to change your spark plugs; you usually get at least 30,000 miles out of them.
5. Špatné palivové čerpadlo
Running rich — which means too much air is in the combustion chamber — is a major cause of engine knocking. Several components impact the air-fuel ratio, the fuel pump being one of them. When it malfunctions, not enough fuel reaches the engine, causing it to knock.
Fuel pump replacements typically cost between £200-500.
6. Worn engine bearings
Engine bearings support the crankshaft and allow rotation when the engine is operating. When worn, they may not offer enough support, creating a knocking sound when pistons rattle against the crankshaft.
Is it safe to drive with a knocking sound?
Knocking can be a sign of a serious problem with your engine, so you should avoid driving and book a diagnostic test as soon as possible. Using your car when it is making a knocking sound can be dangerous, and you may end up with a more expensive repair bill.
Pokud máte se svým vozem nějaké další problémy, které byste se chtěli pokusit diagnostikovat sami, podívejte se na naši příručku o vlastní diagnostice problémů s autem. Čím více budete vědět o tom, jak vaše auto funguje, tím lépe.
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