Question about 2003 Mini Cooper

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Engine knocking on and off

2003 Mini cooper S with 65K miles.
Most of the time it goes away after the engine warms up, but not every time. It mostly knocks while at idle.

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  • Anonymous Feb 05, 2009

    what problem engine oil lamb on/of mini couper s 2004



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  • Mini Master
  • 959 Answers

Inspect the harmonic balancer.
When the crank turns there is a rubber buffer between the pully and crank portions of the balancer that could have let go causing an engine knock like noise.

Posted on Nov 23, 2008


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2001 azteck 49000 miles use very little once every

The 3.4L engine has special pistons that are designed to expand as the engine heats up. When the engine is cold, the pistons make a knocking sound that resembles lifter noise or piston slap. As long as the noise goes away after the engine warms up, don't sweat it; this is normal.

Sep 17, 2014 | 2001 Pontiac Aztek

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My 2003 x5 bmw 4.6is, makes a knocking noise in the Engine upon stating it up, but usually goes away after a few seconds.

Sounds like excess bearing clearance, when the engine sits overnight the oil between the bearings and the crankshaft is able to run back into the oil pan. When you first start it up it takes a few seconds for the oil pump to fill the spaces back up and you get some clatter.

Jul 26, 2014 | 2003 BMW 5 Series

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Chevrolet Uplander 3.9L intermittent knock until warmed up

could it be a high pitch knocking like a ticking-this would be a lifter thats not pumping up right any-it may be time for oil change to winter oil-5w20-oil change could help anyway-cheers Denny

Nov 19, 2013 | Cars & Trucks

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Hard to say over the internet but I will try to explain. If the noise is a distict KNOCK KNOCK and it sounds like it is coming from the bottom of the engine, then it most likely is a rod or main bearing. If it is a TAP TAP noise that sounds like it's coming from the top of the engine, then most likely a valve lifer is failing/failed.
the fact that it goes away when the car is warm, makes me lean towards a bad lifter. Normaly if a bearing is bad and knocking, the noise doesn't go away.

The KNOCK noise will be somewhat hollow sounding and the TAP TAP sound will be more solid. If the KNOCK KNOCK is solid, then a rod or main bearing has most likely failed to the point that a new/reman engine will be needed.

Jun 14, 2011 | 1994 Pontiac Grand Prix

1 Answer


what fuel does this one use?
any observations when driving with an cold engine?
Sound a little like a spark timing problem or worn out spark plugs

Jan 25, 2011 | 2003 Mini Cooper

1 Answer


If the knock goes away after it warms up there are 3 possible causes for this:
1. The pistons are slapping meaning there is piston or engine wear.
2. There is carbon on the top of the pistons. This is the most likely cause.
GM says this is not detrimental to the engine.
3. The o-ring between the oil pump screen and the oil pump may be cracked causing areation of the oil. This one was supposed to be there from the time the engine was new but I have seen the problem appear at 50k miles. The oil pan will have to come off to replace the o-ring.

Nov 29, 2009 | 1999 Chevrolet Silverado 1500

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Engine fan won't turn off

That's a good one. Follow the cable. Most of the cases is under the hood near cabin wall.

Jul 30, 2009 | 2003 Mini Cooper

1 Answer

2003 minicooper,the road flooded,water went into the air intake.

has it a tinming belt if so id check it hasnt moved a tooth or it could of streched and bent a valve

Jun 05, 2009 | 2005 Mini Cooper

2 Answers

Engine knocking

the most common issue is what is called piston slap, GM's official stance is that it will not cause any long term damage, in other words it is just annoying, my Corvette has the same noise, goes away in about 2 miles, had it to the dealer and that is what they said, and i agree with them because it has never gotten any worse after years or hard use/.

Jan 27, 2009 | 1996 Pontiac Grand Am

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