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wen my engine is at is first fired up it makes a knocking noise similar to that of a bearing coming from the rear of the engine\transmission area but wen it is given revs or warms up to idle the noise stops, i believe it is because the engine is running smoother. at 1st i thought it may be the exhaust is loose an hitting on something but cannot find anything hitting anywhere is there any common faults or anything anyones knows frm experience what it might be
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When I first bought my Monaro the idle was set too low and this used to make one of the exhaust pipes rattle against the floor pan.
I got under there numerous times trying to find it without success.
I couldn't rattle it by hand but when the engine
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I hope it's something simple but it might be a bearing or gudgeon pin in the motor going. No oil pressure when you first start up may cause the knock. Long shot sometimes the motor will also get a bit of a knock up on start up if the fan belt is a littl
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Thanks ill check the exhaust and if its happening when the oil pressure is low.. Once it stops raining and almost snowing here .. Its ment to be spring lol.
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We had the same prob with our XF ute and it turned out that one of the lifters had punched it's arse out and had worn the lobe down on the cam. It kept going until it started sounding like a vaccuum cleaner and wouldn't go no more.
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keithholden - Did you get to the bottom of this one?
What was the noise?
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Hi havnt got to the bottom of it yet. Its not the exhaust but I was told it could be the bottom of the skirt of the piston broken off. But the boy hasnt driven it lately so will have to wait see. Hes lost licence for Drinking and driving.
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if the noise goes away i cant see it being a piston.probably a sticky lifter.
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Hope fully a lifter tuff250.. The lifters were replace about 2000km a go when we got a cam grind..We ran the cam in at the revs it recomended for 20mins.
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If its not broke it will be soon |
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