Q: Diesel knock too high

asked by on September 30, 2016

The diesel knock on my mitsubishi L200 4d56 non-turbo engine is too high. What causes this, and what is the remedy?

My car has 97000 miles.
My car has a manual transmission.

Oil level is low Inspection $94.99 - $114.99 Get a Quote
Change Oil and Filter $103.58 - $181.08 Get a Quote
Noise from engine or exhaust Inspection $94.99 - $114.99 Get a Quote

It is possible that your engine could be low on oil. I would recommend checking the engine oil level and condition.

If the oil level is low, this can cause the engine to make knocking sounds and potentially could damage the engine. If the condition of the oil is not good, this can also cause the engine to make noise because it is not lubricating the engine as well as it could be.

If you find your oil to be in one of these two conditions, I would recommend getting an oil change from a qualified professional, such as one from YourMechanic. They will be able to diagnose the knocking noise firsthand if the problem persists. Best of luck.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

What type of power steering system is used?
While many cars still use a conventional hydraulic power steering system, yours doesn’t. It actually uses an electronic power assisted steering (EPAS) system. This means that you don’t have to worry about checking power steering fluid, and you do not...
Trouble starting when cold or damp outside.
This sounds like a possible battery problem. Batteries do not perform as well in colder temperatures. Batteries have a rating for starting power measured in cold cranking amps (CCA). I would recommend having your battery load tested (https://www.yourmechanic.com/services/battery-is-dead-inspection) by a...
Dashboard draining battery
First, let's determine if the engine is cranking. If the engine is not cranking it could be any one of these issues: weak or defective battery, bad battery cables, ignition switch, starter motor, seized or hydrolocked engine, or other wiring....
Squealing noise
Hello. It sounds like your drive belt may need adjusting. Drive belts that are too loose can squeal, especially when the engine is cold. I suggest you have a trained professional, such as one from YourMechanic, adjust your belt (https://www.yourmechanic.com/services/adjust-drive-belts)...
Cel code p0129
Well you replaced all the parts associated with your code. You need a voltage meter to measure the voltage at the sensor. There should be a 5 volt signal and a ground on the outer wires on the sensor. If...
My car keeps stalling - 2012 Ford Escape
Hello there, stalling issues with your 2012 Ford Escape can be caused by many faults. The most common faults are the MAF sensor, vacuum leak, oxygen sensor, fuel pump, or crank position sensor. I am unsure what you mean by...
Vauxhall Corsa D 2013 - Brake Light Switch needs locating.
Hi there. Go to the brake pedal and look at the top of the leg of the pedal and you will see a switch that is mounted on the bracket that the pedal is hanging off of. That switch is...
Coolant reservoir is a block of ice, is it possible to thaw it out and flush the system without damaging anything?
If you have a frozen overflow coolant bottle then the same coolant mix is in the engine and may also be frozen in the engine and radiator. You will need to move the vehicle into a building that is above...
My trunk lid keeps rattling/shaking when I drive it on a bumby road and it's very loud.
Hi there. It sounds like you have either a latch problem or a trunk adjustment problem. There could be worn or bent components in the latch assembly causing the concern. I suggest having a qualified technician perform an inspection to...

Related articles

How Often Should the Steering System Be Inspected?
It’s It’s usually better to fix an automotive problem early than to wait until it causes more damage or even an accident. And that general principle applies to the steering system. Luckily, periodic inspection and maintenance of the steering system...
Top 10 Ways to Extend the Life of Your Car
Every driver wants a car that lasts a long time. Make your car last longer by checking your motor oil, parking in the shade, and keeping it clean.
How Long Does a Horn Switch Last?
With With all of the danger on the roadways, finding a way to keep yourself and your car safe should be a concern. A car has a variety of different mechanisms that are built into it that will allow for...