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Isolating engine knock - Engines & Components for Honda Civic 4 Door

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Try to determand if its the upper end,or the bottom end.wather its a clicking or a clunking sound.could be crank bearings,or a broken rod.flat cam,to push rods an valves.try your best to pin point it.a slethascope will help.

Posted on Apr 16, 2014

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Knock sensor for 2007 Saturn outlook. I can't pass emissions test!


Check engine light on ? What code ? There are many different (DTC'S) - diagnostic trouble codes that can set for knock sensors ! There all don't mean that you replace the sensor .
DTC P0324: Knock Sensor (KS) Module Performance
DTC P0325: Knock Sensor (KS) Circuit Bank 1
DTC P0326: Knock Sensor (KS) Performance
DTC P0327: Knock Sensor (KS) Circuit Low Bank 1
DTC P0328: Knock Sensor (KS) Circuit High Bank 1
DTC P0330: Knock Sensor (KS) Circuit Bank 2
DTC P0332: Knock Sensor (KS) Circuit Low Bank 2
DTC P0333: Knock Sensor (KS) Circuit High Bank 2

The knock sensor (KS) system enables the control module to control the ignition timing for the best possible performance while protecting the engine from potentially damaging levels of detonation. The sensors are located below each cylinder head on the engine block. The KS produces an AC voltage signal that varies depending on the vibration level during engine operation. The control module adjusts the spark timing based on the amplitude and the frequency of the KS signal. The control module receives the KS signal through 2 isolated signal circuits. The control module learns a minimum KS noise level at idle and uses calibrated values for the rest of the RPM range. The control module should monitor a normal KS signal within the noise channel.
Knock Sensor Replacement - Bank 1
Remove the exhaust manifold lower heat shield. Refer to Exhaust Manifold Lower Heat Shield Replacement.
Disconnect the engine wiring harness electrical connector (1) from the bank 1 knock sensor (2).
Loosen the knock sensor bolt and remove the knock sensor.
Knock Sensor Replacement - Bank 2
Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
Remove the engine oil filter. Refer to Engine Oil and Oil Filter Replacement .
Lower the vehicle.
Disconnect the engine wiring harness electrical connector (2) from the bank 2 knock sensor (3).
Loosen the knock sensor bolt and remove the knock sensor.

Nov 12, 2016 | Saturn Cars & Trucks

1 Answer

99 olds.intruge 3.5 engine


loud knocking internal lower part of engine usually means [ rod knock ] --bad wrist pin -spun bearing -or piston ring]s] --that the worst other can be timing failure --or component failure --you need to isolate the noise and diagnose from there

Oct 01, 2016 | Cars & Trucks

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07 grand caravan sounds like a rod knocking, but look at them & no sign of worn out bearing.


Without actually hearing the noise, it is hard to help. You can try starting the engine and disconnecting one plug wire at a time to see if the noise diminishes when the plug wire is disconnected and this will help isolate the cylinder causing the noise and then diagnose from there.

Jul 12, 2015 | 2007 Dodge Grand Caravan SXT Minivan

2 Answers

Knocking sound in engine


which engine? "size"?
ever seen a $5 stethoscope.?
using it, you can find any source of any noise. easy.
ever do an oil change every 5k? on older cars , ?
using 10w-30 or 10w-40 oil? not 5w?

Sep 23, 2014 | 2002 Jeep Grand Cherokee

1 Answer

What could be wrong if I hear a knocking in the front of the engine and the engine is hard to start, as well as the engine will not idle?


Automatic idle module isn't working. Isolating the knock is going to be more difficult. There are many reasons an engine knock develops. It will take a good mechanic to tell for sure.

Jul 12, 2014 | 2004 GMC Envoy

1 Answer

Got very bad nock in motor all fluids and gages are good. Engine light is on


Did changing the oil cause your light to go on? You didn't say if the noise started all at once or if it has gotten louder over time.

Typically a knock not related to predetonation ("pinging") will typically come from the connection at the crankshaft to the piston connecting rod. A slapping sound may occur if the connecting rod pin is sloppy or part of a piston skirt is damaged. I had a 98 Durango but can't remember if you have hydraulic lifters. A bad lifter can also emit a knock. If you have more of a clatter check the rocker arms. It's also possible a pushrod is bent. Use a mechanics stethescope or metal rod and try to isolate the noise source. The precise location of the knocking will improve you odds of solving the problem.

Jan 08, 2012 | 1998 Dodge Dakota

1 Answer

I think i have a rod knock. it stalled out when i was driving and there was water over the road but i was told the water pump culd make te same noise also. please email me back


Check the oil see if there is water in it, never really heard a knocking water pump how ever anything is possible. You can use a wooden broom stick to touch to different engine components to try and isolate the noise location. You can't get that stick to the water pump because of the belt I'm sure be very careful.

May 26, 2011 | 2001 Pontiac Grand Am SE

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Theres a knocking noise we thought it was the tension pulley replaced it replaced serpentine belt replaced alternator the knocking continues its coming from this area of the engine top part


noises are difficult to track but since your's is on top, try this-CAREFULLY use a wooden handle (from a broom, or paint roller extension) and place the end against items on top of the engine-the other end, your ear. Be aware of the moving pulleys and the belt, take your time-you can isolate the noise this way, and plan your next step.

Jan 04, 2011 | 1995 Buick LeSabre

1 Answer

1992 GMC Sonoma - 4.3l cannot start after stall and knocking.


Sounds like an engine sensor, EGR valve or O2 sensor has failed. First thing to do is to look at the engine trouble codes to pin down the failure. You can usually borrow an OBD1 code checker from your local parts store.

Mar 11, 2017 | 1992 GMC Sonoma

1 Answer

I own a mercedes 190e 2.5 16v cosworth 1990 model I have noticed that it has developed a knocking sound rather like a grandfather clock. This seems to come from the fuel tank and might be something to with...


You may want to check first if the knocking sound proportionately increases speed or decreases with engine RPM. If it does, that should tell a clue as to where to look for the sound. Could be mechanical. I suggest to isolate the problem first, when it occurs, conditions present when it does etc...

Jul 15, 2008 | 1984 Mercedes-Benz 190

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