 | Home > Td5 > Extra Whistling noise |
 
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| charliebaja Member Since: 05 Aug 2013 Location: Surrey Posts: 211   
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I have noticed an extra whistling noise on boost from the front end of my TD5. The engine is modified and has been fine since i had it done about 2 years ago. It was all working fine until on the way back from Wales and I noticed the extra noise. I feel that there isnt a loss of power however now and then it feels there might be a splutter.
Any suggestions, Oh and i have checked to pipes and manifold and cant see any black soot. |
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7th Jun 2015 9:40pm |
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| Clive Member Since: 21 Mar 2014 Location: Littleborough Posts: 467 
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Have you replaced the air filter recently, I did this a couple of weeks back, found I hadn't clipped the back edge of the filter box lid in properly on one corner, so it was sucking in air through the gap when under boost.
Otherwise, maybe a split/crack in the intercooler somewhere? |
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8th Jun 2015 7:55am |
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| Dpgdefenders Member Since: 11 Nov 2014 Location: North Yorkshire Posts: 9 |
Check none of the exhaust manifold to head studs have not sheared off.
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24th Jun 2015 10:11pm |
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| michaelwl Member Since: 19 Nov 2014 Location: Durban Posts: 65  
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I had a similar noise and thought I had checked the pipes properly but obviously not, because about 500Km later the pipe popped off from the intercooler and on refitting correctly the whistling had gone. 2002 110 TD5 White
1981 S3 R6 Matt Green - Now used as game viewer 2013 Discovery 4 XS |
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25th Jun 2015 8:08am |
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| charliebaja Member Since: 05 Aug 2013 Location: Surrey Posts: 211
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So the whistling now happens a lot more frequently and there is a certain lack of power at lower revs, funnily still gets to 95mph though!!
I cant see an soot deposits around the manifold and if i rev it when warm at stand still i can hear the extra whistle. Any ideas? |
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28th Jul 2015 5:58pm |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127 
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As said above, check intercooler, pipe work, etc.
Lack of power is a big symptom of leaking intercooler, and hoses. 80" 80" 86" 88" 90" Wanted, Forward Control Anything considered. |
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28th Jul 2015 6:03pm |
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| charliebaja Member Since: 05 Aug 2013 Location: Surrey Posts: 211
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The issue is I think coming from the engine area not at the front, and annoyingly I cannot see any kind of exhaust related soot release.
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28th Jul 2015 9:14pm |
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| Lambley Member Since: 20 Apr 2013 Location: Mid Devon Posts: 1435 
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Blackwolf is right, it's probably a warped manifold that could have pulled a stud, not easy to see with the heatshield in place, look for sooty deposit around one of the 5 manifold outlets, also check the turbo gasket, I've got a skimmed and de-webbed manifold ready for mine, just not got around to fitting it.
On a tuned Td5 it's a regular problem, once a manifold has warped, get it skimmed flat and have the webs removed to give it more flex, then fit a better stud kit and refit. Another way to try and see the leak if it's not obvious is spray WD40 of similar around the manifold (cool engine) and watch for bubbles. Best of luck |
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29th Jul 2015 4:41am |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 7983  
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Assuming none of above, damaged turbo impeller? Cheers
James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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29th Jul 2015 5:53am |
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| RLD Member Since: 29 Jun 2007 Location: Lancs Posts: 858
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Had that with mine  RLD fabricator of Hidden Winch Mount for D3/4 roof racks jerry can holders CB aerial mounts and much more and agent for Helsport Tents and gear |
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29th Jul 2015 11:27am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17314 
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I currently have this problem with my Disco2 - it whistles like an incoming ICBM when under acceleration.
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29th Jul 2015 12:29pm |
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