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Author Topic: Some Engine Noise...  (Read 2524 times)

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fcc-pt

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Some Engine Noise...
« on: 14 March 2012, 11:48:01 »
Hi, my omega v6 3.0 (x30xe) sometimes makes a strange noise that comes from the bonnet. It recently started to make a kind of   rrrrr rrrrr noise which gets louder if I accelerate and if I keep accelerating eventually it fades away in matter of seconds. It has a new water pump, timing belt kit, thermostat, driving belt and new tensioners, all of this with 5000 miles only. Sometimes get difficult to fire at first time but second time no problem at all. When cold I can get high smelling gasoline :) anyway if environment temperature is warm it will start with no problems at all. What you folks think about this?
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freecall666

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Re: Some Engine Noise...
« Reply #1 on: 14 March 2012, 14:40:19 »
could be fan belt adjuster bearing?
as for fuel smell, some times i get that if been parked on hill facing down..
« Last Edit: 14 March 2012, 14:43:09 by freecall666 »
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fcc-pt

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Re: Some Engine Noise...
« Reply #2 on: 14 March 2012, 14:47:46 »
.8
Quote from: freecall666 on 14 March 2012, 14:40:19
could be fan belt adjuster bearing?

Could be except that the fan is electrical and when it operates no abnormal noise can be heard.
Today has fired really bad by the morning, and then next times fired perfect  >:(
Anyway the noise described could not be heard today :) I've changed the oil maybe could be some valve, lifter or something let's wait to see.
« Last Edit: 14 March 2012, 14:52:48 by fcc-pt »
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freecall666

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Re: Some Engine Noise...
« Reply #3 on: 14 March 2012, 14:53:46 »
Quote from: fcc-pt on 14 March 2012, 14:47:46
.8
Quote from: freecall666 on 14 March 2012, 14:40:19
could be fan belt adjuster bearing?

Could be except that the fan is electrical and when it operates no abnormal noise can be heard.
Today has fired really bad by the morning, and then next times fired perfect  >:(
Anyway the noise I described I didn't hear today :) I've changed the oil maybe could be some valve or lifter or something let's wait to see.
alternator bearing or belt adjuster. always still call in fanbelt lol
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fcc-pt

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Re: Some Engine Noise...
« Reply #4 on: 14 March 2012, 14:58:44 »
They are in mint conditions... this is very annoying! It seems that comes from the right head of the engine I don't know, but I never had the opportunity to stop the car and try to find the noise :(
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freecall666

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Re: Some Engine Noise...
« Reply #5 on: 14 March 2012, 15:05:42 »
is it a whining sound or a rumble??? or a zzzzzin sound?
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fcc-pt

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Re: Some Engine Noise...
« Reply #6 on: 14 March 2012, 18:24:32 »
Quote from: freecall666 on 14 March 2012, 15:05:42
is it a whining sound or a rumble??? or a zzzzzin sound?

it is like a rrrr "middle frequence around 3 khz" sound, it doesn't seem raw metallic to me, don't know :)
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albitz

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Re: Some Engine Noise...
« Reply #7 on: 14 March 2012, 18:29:19 »
Exhaust manifold gasket leaking ?
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fcc-pt

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Re: Some Engine Noise...
« Reply #8 on: 14 March 2012, 20:54:49 »
Quote from: Albs on 14 March 2012, 18:29:19
Exhaust manifold gasket leaking ?


No... I've replaced both manifold gasket at one or two years ago maximum.
Well, both rocker covers are leaking a bit... tryed to solve that but stills! I replaced the old rocker covers by gm genuine ones with the reinzosil sealant but the leak still :( I guess that is the only visible leak.
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fcc-pt

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Re: Some Engine Noise...
« Reply #9 on: 16 May 2015, 12:24:29 »
Sorry for this late reply, but I left my little baby in garage in the past two years :(
Now getting back to road after many repairs... the noise still and I suspect that it cames from the gear box...
« Last Edit: 16 May 2015, 12:27:37 by fcc-pt »
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tidla

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Re: Some Engine Noise...
« Reply #10 on: 16 May 2015, 21:12:47 »
 ;D Theres late, then theres late..
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