engine noise (video)
30 August 2007, 06:00 PM
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30 August 2007, 09:01 PM
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is your car a 97-99 (or there abouts ) uk turbo 2000 ?? if so its possibly piston slap.. thats what it sounds like to me...and if so its just that the pistons have some lateral movement in the barrel....not an issue as far as i have been led to believe from peeps in the know and quite common....
30 August 2007, 09:36 PM
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sounds like some sort of bearing noise.
check bearings of the dynamo and AC pump.
you can do this by placing a large screwdriver against suspected bearing and put your ear on the back of the screwdriver (kind of like a stethoscoop).
check bearings of the dynamo and AC pump.
you can do this by placing a large screwdriver against suspected bearing and put your ear on the back of the screwdriver (kind of like a stethoscoop).
31 August 2007, 09:05 AM
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I ran the engine without v-belts and it was also knocking.
Since this goes away complitly after engine is warmed (but is back very quick, some of it can be heard just after engine is not running for 10 minutes). I think this is either a piston slap or a timing belt tensioner issue. I tried to locate this noise using ski sticks (rubber end to ear) but I cant.
Some more tips:
1. My engine does not burn oil. I cant notice any oil loss during last >12000km. Is it posible that a piston slapping engine does not take oil at all ?
2. Knocking is not audiable at idle. Only audiable when raving engine / accelerating, best audiable at 1500-2000rpm. If I hit a throtle quickly and then let go quickly it makes a single knock.
3. I'm running mobil 1 5W30 oil.
Since this goes away complitly after engine is warmed (but is back very quick, some of it can be heard just after engine is not running for 10 minutes). I think this is either a piston slap or a timing belt tensioner issue. I tried to locate this noise using ski sticks (rubber end to ear) but I cant.
Some more tips:
1. My engine does not burn oil. I cant notice any oil loss during last >12000km. Is it posible that a piston slapping engine does not take oil at all ?
2. Knocking is not audiable at idle. Only audiable when raving engine / accelerating, best audiable at 1500-2000rpm. If I hit a throtle quickly and then let go quickly it makes a single knock.
3. I'm running mobil 1 5W30 oil.
31 August 2007, 10:05 AM
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Can you locate it better? Listen using a long screw driver as suggested above to the center of the engine and over each cylinder head. It sounds like it could be something in the heads i.e.tappets... I would also suggest you run thicker oil (10w40 - 15w50) although I dont know what oil your meant to run in a 2.5na but thicker oil is better in the 2.0turbo engines.
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31 August 2007, 07:22 PM
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best way to tell if you have a failing bottom end (con rod bearings) is to do exactly as you did revving the engine and lissen for the knock and then pull the plug of the spark plugs one at the time.
If the knocking disappears you know which cilinder has a busted bearing.
If the knocking disappears you know which cilinder has a busted bearing.
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