All Things Mk5 > How to Guides / Troubleshooting
Strange resonance coming on boost...?
AJP:
Hi
Recently had a new rev G dv, pcv and cam follower fitted to my k03 GTI and the car now performs nicely. The rev C dv that came off was split, unsurprisingly.
I've just noticed over the last couple of days that when on full/moderate throttle I can hear a high pitched whistle, very briefly, around 2000-2500rpm.
Now it's not a turbo whistle 'sss' sound, or an induction hiss, more like a whistle that you'd make yourself, there's an actual note to it. It sounds similar to that odd resonance you get with some intakes on the k03 engine. Yet I'm completely standard.
I'm wondering if there's a tiny boost leak somewhere. I'd imagine that before the new dv was fitted, the rest of the pipework wouldn't have seen enough boost to cause this, which explains why I'm only hearing it now!
So what are the other weak points with the k03 engine? Intercooler pipework?
MrACD:
The intercooler pipes are known to leak via the rubber o-rings.
2 on the drivers and 1 on the passenger, well worth swapping.
Through the stealers the o-rings are surprisingly expensive :fighting:
AJP:
Cheers for that mate. How expensive are we talking?
And are these on the ends of the actual cooler, or further along the pipework?
MrACD:
--- Quote from: AJP on July 06, 2015, 03:37:01 pm ---Cheers for that mate. How expensive are we talking?
And are these on the ends of the actual cooler, or further along the pipework?
--- End quote ---
Got ripped a new one :confused:, my local hit me for £23 for the 3. :signLOL:
3c0 145 117h (x1) and 3c0 145 117f (x2)
From the intercooler to the connecting pipe (f) and connector to metal pipe (h) - drivers side.
Passenger - Intercooler to connecting pipe (f).
:happy2:
Beej:
I too have the same sound (I think) going from your description, although, I replaced my dv with a rev g, but I have an airtec cooler and pipes fitted and running 2 / 2+ tune. I had the noise before fitting the cooler though, so I am presuming it's normal
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