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[mka306]

After putting the engine back together with the new oil cooler and spark plugs I started the engine, it started with no issues at all but I can now hear what sounds like a belt rubbing noise, it's not coming from the timing belt that i'm sure of but it sounds like it's coming from inside the engine. Any ideas what it could be as I'm worried something is going to go bang? The sound does wear off as the engine warms up.

[mka306]

This is a video clip of the noise...

[Andy B]

fan/aux belt tensioner roller ............ 

Take the fan belt off & run the engine (not for long though) . if it goes, it's something  to do with the fan belt/alternator/aircon, if not ...... obviously something  else 

[mka306]

fan/aux belt tensioner roller ............ 

Take the fan belt off & run the engine (not for long though) . if it goes, it's something  to do with the fan belt/alternator/aircon, if not ...... obviously something  else 

Is the alternator not run by the timing belt? I the fans are in the grill area and the alternator is attached under the v6 block?

[The Sheriff]

This is not the exact same engine but will show you which belt does what:

http://youtu.be/8LKB6fBYVaw

[deviator]

Looking at that video, I can't see a belt on the alternator pulley. Which would put this firmly in the cambelt area, unless you've managed to completely route the belt wrong, in which case that's the problem.

Have you done anything to the front face (cambelt side) of the engine?

[The Sheriff]

Looking at that video, I can't see a belt on the alternator pulley. Which would put this firmly in the cambelt area, unless you've managed to completely route the belt wrong, in which case that's the problem.

Have you done anything to the front face (cambelt side) of the engine?

It shows the aux belt going on last of all, driving the alternator and air con.

[The Sheriff]

I know virtually nowt compared to the experts on here. One of them will be along shortly, I'm sure.

[deviator]

Looking at that video, I can't see a belt on the alternator pulley. Which would put this firmly in the cambelt area, unless you've managed to completely route the belt wrong, in which case that's the problem.

Have you done anything to the front face (cambelt side) of the engine?

It shows the aux belt going on last of all, driving the alternator and air con.

Sorry the OPs video. No aux belt at all. I'm not convinced that is a belt sound, remove oil filler cap and check there is oil reaching the top of the engine. You can even run it open (briefly) and you should see oil flicking around.

If the cambelt cover hasn't been removed, I would be guessing no oil at the top end and that sound is metal on metal.

[Andy B]

fan/aux belt tensioner roller ............ 

Take the fan belt off & run the engine (not for long though) . if it goes, it's something  to do with the fan belt/alternator/aircon, if not ...... obviously something  else 

Is the alternator not run by the timing belt? I the fans are in the grill area and the alternator is attached under the v6 block?

The belt that is under the cover and you can't see is the timing belt ....
The belt at the front that you can see is the auxiliary belt and traditionally drove the fan. Fans nowadays are electric so nothing to do with aux belt, but us old buggers will still often refer to is as the fan belt .....
Your alternator is driven by your aux ('fan') belt

[zirk]

Sounds like a water pump bearing to me, whip the Aux belt off, does the noise disappear.

[deviator]

Sounds like a water pump bearing to me, whip the Aux belt off, does the noise disappear.

The belt is off, in the OP's video you can see the alternator pulley, empty of belt.

[zirk]

Sounds like a water pump bearing to me, whip the Aux belt off, does the noise disappear.

The belt is off, in the OP's video you can see the alternator pulley, empty of belt.

Ok, cancel that then. 

[mka306]

Sounds like a water pump bearing to me, whip the Aux belt off, does the noise disappear.

The belt is off, in the OP's video you can see the alternator pulley, empty of belt.

The belt is not off my friend it is there I can assure you, just the light not hitting that part of the engine. So I can take it off and it won't cause any issues?

I have not taken any belts off when I changed the oil cooler, it has fresh oil from the oil change and filter change and the level is at the max so no issue there, the sound doesn't continue for long, it goes after the engine starts to warm up, literally a couple of minutes.

[deviator]

Yes sorry. I can see the WP pulley turning, I just couldn't (still can't) see the belt going around the alternator.

Yeah, drop the aux belt off and see if the noise is still there. Also check the pulleys for play. I will suggest taking a photo of the belt route before. It's not obvious unless you've done a few.