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2007 Yaris 1.3 strange noise


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Hi. Comments and advice welcome. Collection of clips in this YouTube video of noise when pulling off a driveway. 
https://youtu.be/5MLZbbC6m6E
The noise is mainly present when in low gears and under load. 
When stationery and revved then it's normal. 
Otherwise it drives and performs well.
It's been to a local garage twice but they haven't been able to resolve it. The last time it went they tightened the inlet manifold bolts and it was OK for a week but the noise returned. Trying to avoid a return visit and paying more money out if this is something known about that I can resolve.
Cheers in advance.

 

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  • Sipart changed the title to 2007 Yaris 1.3 strange noise

That odd, does the engine lack power at the top end ? Does it do it if you give it a bit more gas when bringing up the clutch ?  Remove the aux/fan Belt and see if it still does it

What's the service history like ? What's the mileage ??

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Posted (edited)

Sounds like an exhaust leak to me. Have you tried blocking the tailpipe and listening?

Edited by bathtub tom
Further thought.
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Hi flash22. Thanks for the feedback. 

Power at top end is fine. If you over-rev it when bringing up the clutch then yes noise can be mitigated to a degree. It is worse if you labour it lower down the rev range.

Aux/fan belt as in the alternator ribbed belt around various other pulleys (serpentine belt?)? The car has AC. Can I run and do some basic up and down runs on a short drive with the belt off?

It's serviced every year and it's done 85000 miles. It's been to a local garage (reputable and been in the town for decades) a couple of times for this noise (and services/MOTs done there as well). So you would assume they would of tried this?

Cheers

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Hi bathtub tom. I will try to try that but it only makes this noise when moving and in gear - so maybe a bit difficult. But previous work dealing with this issue did end up with a new cat and mid box (they said exhaust was breaking up inside).

I am a bit concerned we may have paid for work we didn't really need. I appreciate the engineers need to take time to investigate and sometimes it's trial and error and that time costs money. But the bill for cat and mid box for approx £380 was one bill. Some of that may have been necessary of course. And then further investigation and manifold tightening work was £80 (couple of hours labour+vat).

 

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It may be a slight miss under load - Pull the spark plugs and check the gaps, if it's on the original plugs they are about due a change, i wonder if you have Oil down the plug holes

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My 2003 1.3 auto has a similar sounding noise only when pulling away. This only appeared after I had a new exhaust fitted. I think it is to do with the exhaust flange bolts and tension springs but I have done trying to fix it and I now live with it.

I will be interested when you fix it to find out what it was.

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Thanks for all the responses. Will try some of these things and report back (or if I run out of patience what another garage does!).

The Aux/fan belt around the alternator and various other pulleys (serpentine belt? the car has AC) - can I run and do some basic up and down runs on a short drive with the belt off?

We did notice today it made this noise a lot less/hardly at all when put and about and only difference was the constant use of the AC.

Cheers

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