Question about 1996 Cadillac DeVille

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Knocking when pressing the gas more knoking when hot

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Sounds like a rod bearing is bad check your engine oil dipstick and
look at the oil in sun light or with a flashlight if a bearing is going bad
or is bad you will see flakes of metal.

Posted on Oct 29, 2012

  • brian brown Nov 01, 2012

    its good my engine is 7 months old

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2 Answers

4d56 deisel engine, after opening the engine, good idle but when i accelerate knoking sound appear


Not sure what you mean by opening the engine.

The combustion process of a diesel is not the smooth burn and increase in pressure of a petrol engine but is virtually an explosion causing a sudden rise in cylinder pressure. This is the source of the typical diesel knock and is more pronounced in some engines and some injection systems, especially when accelerating. It can be scary for those unfamiliar.
Electronic control tends to soften the noise.

Knocking might be the result of a mechanical problem (piston, connecting rod bearings, etc.) but if these things have been eliminated other causes of excess knocking can be excessive injection timing advance, dribbling injectors, bad spray patterns...

Jun 19, 2016 | Cars & Trucks

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03 kia sorento Engine knocking after replacing water pump oil pump and timing belt


Who did the work? take it back. If it's DIY double check your work. Knoking as in metalic engine , or knocking as in gas preignition. If gas preignition, timing belt is off a few notches. If it's similar to this google: 2003 kia sorento interference engine
You may have valve timing off so much that your pistons are running into the valves. Bad news!

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1 Answer

I have a faulty knock sensor on my 98 mitsubishi


the ecu dont detect knoking and dont change engine timing but the car is goin to keep running

Oct 10, 2014 | Cars & Trucks

2 Answers

Knock sensor location


Knock sensor is located on the cylinder block between no. 1 and 2 cylinder.

May 10, 2014 | 2008 Hyundai Sonata 3.3

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Cylender loaded with gas engine making knoking noise


Maybe a spun bearing or an oil pump not turning any more.

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4d56 engine knoking noise


I see that the engine is a Mitsibushi and suppose to be quite common. There are rebuilds and used engines on EbayUK.com.

Do a Browser search and you will find Repair manuals and possibly a Blog about this series.

Most of the knocks in an engine fall into several catagories. Lean fuel ratios and the failing of a knock sensor and poor fuel. The other catagory is excessive clearance in bearings in the crankshaft, camshaft, or rods.

You can buy an octane booster to add to the gas fuel, be careful if it is a Diesel. There are additives to raise the Cetane rating of Diesels too. If the noise leaves with the additives, you may have a bad "Knock" sensor or bad fuel.

Check your fuel pressure. If the pressure is weak, then the fuel charge is thin and then a "Knock" sensor can not adjust the problem away.

Over advanced timing. If the timing is too far advanced the engine can "Knock". You have to look at all mechanical components that affect timing.

There are varying intensities of a noise which leds to a diagnosis. It is something that has to be experienced and talking about it can not adequately express it. Try the few solutions I mentioned.

There is a website, Aboutautomobiles.com,which has a history of consumer complaints and resolutions by year, make, and model. You might find a clue there.

I hope my solution helps.

Jun 08, 2012 | Cars & Trucks

1 Answer

My engine is knocking how can i fix this


is hydro compensators that are knocking when you press gas pedal is it knoking any worse? try adding oil if oil doesnt help then bring your car to the Service

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99 cadillac escalade knocks when accelerating


Chk. universal joints. Sounds like you got a bad one

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1997 pontiac grand am knoking topside, ajusted valves, replaced fuil filter, fuuil regulater, intake gasket, cleaned injecters,what eilths could it be?


If im correct i beleive those engines have hydraulic lifters in them. Thats probably whats making the noise. it's useless to replace them. It's not gonna affect your engines performance. just let it knock

Oct 08, 2008 | 1997 Pontiac Grand Am

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