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Engine knocking 08 HHR, car turns on but sounds like a diesel engine. What could be the cause?

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6ya6ya
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Posted on Jan 02, 2017

  • 98 Answers

SOURCE: refilled the resovoir with coolant now knocking noise

im very soory to tell you i think that the head gasket went.and the knocking means your motor is no good.

Posted on Mar 11, 2009

  • 14036 Answers

SOURCE: I have a toyota hiace 3 liter diesel(200000km).

WORN PISTON PIN AND PISTON SLAP WILL CAUSE THAT NOISE ON IDLING.

Posted on Feb 21, 2010

  • 439 Answers

SOURCE: what could cause a loud knocking in my car engine

It could be a rod that hase came loose from the crankshaft or the piston. It could also be caused by overheated cylinders firing on exhaust strokes or firing early on compression strokes.

Posted on Feb 06, 2012

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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

1 Answer

If i have a diesel engine and my tank is 80 litre and put 70 litre diesel and 10 litre petrol in my tank what will happen to my diesel engine than


That depends on the amount added and the engine, yours would be 7 parts diesel to 1 part gas. I do not have the different effects on engines using different ratios of deisel to gas, I suspect the richer the mix ratio of gas to deisel, the more noticable the reactions will be. First off there are two immediate impacts of diesel fuel mixed with gasoline: the octane is lowered and the fuel vaporization is reduced. The lowered octane may cause the engine to knock. Some engines have knock sensors and the electronic controls that will adjust the timing and other engine conditions to try to control the knock. If the knock remains significant it can damage the engine by causing metal fatigue eventually leading to failure of critical parts like pistons, connecting rods, heads. Some very old engines (e.g. 1950's tractors) can accomodate lower octane, but the ones found in recent autos are normally running close to the knock threashold. The reduced volotitility caused by the added diesel will cause hard starting and will probably result in some unburnt hydrocarbons remaining in the exhaust gas from the engine; these may be reacted in the catalytic convertor causing it to overheat. A modern electronic controlled emission system controls the oxygen level in the exhaust gas going to the convertor so the significant increase in hydrocarbons with controlled oxygen may save the convertor, but will likely result in unburnt hydrocarbons exiting the exhaust. This will result in a smell and air pollution. Gas will also damage deisel fuel pumps as well.

Dec 15, 2013 | Cars & Trucks

1 Answer

Engine knocks like a diesel


Does it knock when you accelerate? Especially under heavy load? If so, try a higher octane gas.

Nov 13, 2013 | 1984 BMW 7 Series

1 Answer

I have a mitsubishi delicia 2.8 diesel that has a knock on start up but goes away after a bit (about 30 seconds) sounds ok when been running,worse when starting up from cold.thanks


There are many things that can cause an engine to "knock" on startup. For diesel engines, an injector that is leaking and dripping fuel into the cylinder after engine shut down, can definately cause this. However, injector balance tests, as well as other tests should be performed to identify the exact cause of your problem. If it is an injector, the cylinder balance test will tell you which one.

May 19, 2012 | Mitsubishi Cars & Trucks

1 Answer

What is a BCM in a 2008 chevy HHR


I have a 08 hhr and for some reason when my car sits over night and or in colder weather the car won't start with the key I have to use my viper alarm remote start would could cause this. And also my climate control takes a long time to turn on in cold weather to.

Mar 27, 2012 | 2008 Chevrolet Hhr

1 Answer

Knocking noise, followed by a hiss when I turn engine off


Check and see if you truck is getting to hot. this sounds like dieseling caused by overheating. the hiss is just part of that

Jun 22, 2010 | 2005 Chevrolet Trailblazer Ext

2 Answers

Engine sounds like a diesel


Need more info...

Whats the mileage??

Have you checked the oil level??

Take to Auto Tech to be sure.

May 11, 2010 | 2004 Mercury Mountaineer

1 Answer

Knocking in cylinder head of escort 1.8 lx td


Hi

Engine knock, if it is coming from low down in the block, is usually caused by worn big ends, and is more pronounced at idle or under load.

Diesels, however have the added bonus of being able to create a nice knock due bad fuel atomisation, overfuelling, or excess oil burning.

Bad fuel atomisation is usually caused by dirty injectors.

Excess oil burning is usually caused by a worn turbo amongst other things.

Very best regards

Geordie

Jul 09, 2008 | 1996 Ford Escort 4 Door

1 Answer

Engine noise at idle


an injector could make it sound like an engine knock it s called a diesel knock

Jun 12, 2008 | 2001 Volkswagen Jetta TDI

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