0
A experienced ear can usually identify the type of problem just by the sound.
To Narrow down the location try:- Shorting Each cylinder so it does not fire, if the knock goes away or substantially reduces for one you have narrowed you search to one cylinder.
- Use a mechanics stethoscope, this will localise the noise and lead you to valves, bottom end, piston or timing system
- If this is a Common Rail injected unit a computer scanner to shut off injectors will help.
Still curious? Ask our experts.
Chat with our AI personalities
Rafa
Steve
ProfessorAdd your answer:
Earn +20 pts
Why does my motor have a knock when you rev the motor up?
because its either cold and not warmed up or you lifters are knocking but the would be a louder knocking sound
What would cause a loud knocking sound and scratching sound in the 3.1L chev Lumina motor?
it was meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
What is the cause of the knocking if tie rod change?
Perhaps a worn CV joint (usually more of a clicking sound when turning), but there are many components in the front end of a motor vehicle that could cause a knocking (or similar) sound, including suspension components, brakes, steering components and bearings. Worn tie rods, by the way, do not normally cause a knocking sound, but result in very loose feeling steering and noticeable drift, especially at highway speeds. A knocking sound is more likely to be an engine problem, such as pre-ignition. If you are not accustomed to diagnosing these sounds, you will best best off to see a qualified mechanic, or a friend who is more familiar with the front-end components of a motor vehicle.
What causes a knocking sound in engine?
Mine did the same, mine was a motor mount.
What causes a knocking sound on 1983 VT500C motorcycle?
Possible cam chain tensioner has broke.these tensioners are none adjustable and sometimes brake causing a knocking sound in the motor
Why would an 89 cad deville make a knocking sound when its off and parked?
Most likely your motor is low on oil and is knocking from being over heated.
A 2000 geo metro is making a knocking sound in motor like a rod but it is't?
Valve train
What is the knocking popping sound we hear when turning taking off and bumps?
I had a popping/rolling sound whenever I would take off or slow down in my '04 pacifica. I took it to a dealer and they said my motor mount was cracked in 2 places sending a vibration throughout the frame of the vehicle. Replaced the motor mount and the popping.rolling sound has gone away.
Why would a 1992 Pontiac Bonneville SSEi have single knock sound from the back bottom of the motor after the engine rev comes back to idle?
I read that bad motor mounts can cause this knocking sound
Car makes loud knocking sound at high speeds?
A loud knocking noise in the motor of a car at high speeds is most likely the engine. There could be another issue with the transmission if the knocking only happens at high speeds.
Why is there a knocking sound when blower motor is on in 04 cavalier?
Sounds like there may be trash in there..drop the blower motor out,get the debris out, put it back in...simple job...
I got a truck and it makes a knocking sound in the motor do you think it can be fixed?
it all depends on the loudness and where the sound is coming from, it can range from a loose bolt to bad connecting rod bearings
