Whine from engine Comp?

zannyUK · 07-09-2010, 08:18 PM

Hey,

I've got a 07 Plate Focus Zetec 1.6

When I start car from cold, everythings OK. But after driving for 10mins, at a standstill and in Neutral I'm hearing a highish pitched whine/hum inside the car.. prob coming from under bonnet. It increases in pitch as you rev.

Checked all normal stuff: fans off, aircon off, watertemp gauge normal at midway.

Could this be alternator, or accessory belt problem? How could I narrow this down?

Thanks

K!

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tabetha · 08-09-2010, 08:55 AM

Likely to be the alt, next time it does it put the heated lecky rear window on and other lecky bits see if the note changes as the alt is loaded up, another thing you can do is disconnect the auxillary(fan) belt and run for a short while say 20-30 secs.
tabetha

zannyUK · 08-09-2010, 10:05 PM

Cheers... I'll have a look and let you know

mikeross · 10-09-2010, 08:03 AM

I did this when I had that problem before when I just installed some ford oem parts. My uncle taught me this. I started the engine and opened the hood; then I took a piece of wood about 2"x2"x2' and I touched one end to various engine components(power steering pump, water pump, alternator, ac compressor,etc) while touching the other end to your ear. sound moves through the block of wood faster than air, so when you touch the component making the noise you should be able to hear it much louder through the block of wood. But keep this in mind: do not stick the block of wood in any moving parts

DannyP · 11-09-2010, 07:18 AM

if neither of them clutch thrust bearing?

zannyUK · 11-09-2010, 10:16 AM

Thanks for the input so far guys.

Update...

Doesn't seem to be alternator. If it was the clutch thrust bearing, would the noise alter when I pressed the clutch in? (it's a manual gear box)

Cheers!

zetec-Sam · 11-09-2010, 11:52 AM

My 1.6 does this, but it's the clutch release bearing I think, as it stops when I push clutch down. Although, mine makes so many noises, I don't worry about that one

10-09-2010, 08:03 AM	#4
mikeross Virgin Garage is empty, add now Trader Score: (0) Join Date: Oct 2009 Location: NY Posts: 11 Rep Power: 0	I did this when I had that problem before when I just installed some ford oem parts. My uncle taught me this. I started the engine and opened the hood; then I took a piece of wood about 2"x2"x2' and I touched one end to various engine components(power steering pump, water pump, alternator, ac compressor,etc) while touching the other end to your ear. sound moves through the block of wood faster than air, so when you touch the component making the noise you should be able to hear it much louder through the block of wood. But keep this in mind: do not stick the block of wood in any moving parts Last edited by mikeross; 14-09-2010 at 03:15 AM.

11-09-2010, 11:52 AM	#7
zetec-Sam neeeeeeeeooowmmmm Garage is empty, add now Trader Score: (2) Join Date: Oct 2009 Location: Laannndaaaannnn Posts: 4,712 Rep Power: 8	My 1.6 does this, but it's the clutch release bearing I think, as it stops when I push clutch down. Although, mine makes so many noises, I don't worry about that one __________________

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08-09-2010, 08:55 AM	#2
tabetha BANNED BANNED Garage is empty, add now Trader Score: (0) Join Date: Jul 2006 Location: uk Posts: 24,621 Rep Power: 0	Likely to be the alt, next time it does it put the heated lecky rear window on and other lecky bits see if the note changes as the alt is loaded up, another thing you can do is disconnect the auxillary(fan) belt and run for a short while say 20-30 secs. tabetha

08-09-2010, 10:05 PM	#3
zannyUK Virgin Garage is empty, add now Trader Score: (0) Join Date: Sep 2010 Location: Norwich Posts: 3 Rep Power: 0	Cheers... I'll have a look and let you know

11-09-2010, 07:18 AM	#5
DannyP Keep up Garage is empty, add now Trader Score: (0) Join Date: Dec 2009 Location: Trowbridge Posts: 6 Rep Power: 0	if neither of them clutch thrust bearing?

11-09-2010, 10:16 AM	#6
zannyUK Virgin Garage is empty, add now Trader Score: (0) Join Date: Sep 2010 Location: Norwich Posts: 3 Rep Power: 0	Thanks for the input so far guys. Update... Doesn't seem to be alternator. If it was the clutch thrust bearing, would the noise alter when I pressed the clutch in? (it's a manual gear box) Cheers!

11-09-2010, 11:52 AM
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