Konrad Posted November 23, 2006 Share Posted November 23, 2006 I found out 2 days ago some strange noise coming from around induction kit area, more precise, from under or next to or directly from air filter "box" (it is actually mushroom). There you have sound: http://www.konio.pwp.blueyonder.co.uk/strange.wav This "screetching" sound seems to fade once engine is little warmer, it happens only when engine is completely cold. There is no visible power drop, car is driving like was driving before, that's why i'm confused. I cannot locate exact place noise is coming from, but if I would have to guess, I would say it is radiator fan or it is sound of air being sucked by induction kit (?). Btw. should fan on radiator be working from cold engine start? I thought those suppose to switch on, when coolant will reach some temperature... PS. i know that quality of sound may be little crap, but it is not slipping belt - i heard this sound before many times Quote Link to comment Share on other sites More sharing options...
Konrad Posted November 24, 2006 Author Share Posted November 24, 2006 Ok, some engineer in our garage seen it and told me it is normal thing since i change my air filter replacement to proper one from some pieces of foam. Sound is coming from induction kit and fading after 30 sec - 1 min when engine getting warmer. Seems that more air is sucked up into engine when it is warming up Quote Link to comment Share on other sites More sharing options...
Scooter Posted November 24, 2006 Share Posted November 24, 2006 This "screetching" sound seems to fade once engine is little warmer, it happens only when engine is completely cold. There is no visible power drop, car is driving like was driving before, that's why i'm confused. I cannot locate exact place noise is coming from, but if I would have to guess, I would say it is radiator fan or it is sound of air being sucked by induction kit (?). firstly i have no sound at work...........but if the induction kit has always been there and isn't new, then i'd look very carefully at the crank pulley. This is the lowest pulley the aux belt goes around and is know to come apart with sometimes expensive consequences......... search for "Crank pulley noise" and have a good read of others symptoms..... Quote Link to comment Share on other sites More sharing options...
Konrad Posted November 24, 2006 Author Share Posted November 24, 2006 That's the main problem - after 30 sec of idle running, sound just fading off and do not show up again, that's why i'm confused. It do not getting any louder when i rev. And about induction kit, I just changed recently air filter from some fat foam, which was literally in pieces to proper HKS air filter replacement. I will take a look onto crank pulley anyway. Edit: Just went down to car, switched it on, noise is not present at the moment - engine was off for around 2 hours, it just happens when engine is off for at least 8 hours+. Crank pulley seems to be stable, not wobbling, moving, screetching, I rev car a little, only noise i got was from my nice big exhaust Quote Link to comment Share on other sites More sharing options...
Daston Posted November 24, 2006 Share Posted November 24, 2006 yeah I would get that checked out mine let go when I was going to get it checked and could have taken out a lot of parts in my engine bay. Thankfuly I was lucky and it didnt do any further damage. Quote Link to comment Share on other sites More sharing options...
Daston Posted November 24, 2006 Share Posted November 24, 2006 mine only made a noise on start up and was fine when the engine rev'd Quote Link to comment Share on other sites More sharing options...
Konrad Posted November 24, 2006 Author Share Posted November 24, 2006 Well i understand, I will give it as a clue to engineer at Sunday, but mind you, this noise dissapear absolutly independent from engine revving and switching on/off all engine. It just goes away after 30sec - 1 min from engine start. And I'm 80% sure it comes from inside of induction kit. Anyone with HKS induction kit got some sucking noise from kit at engine warm up? Quote Link to comment Share on other sites More sharing options...
Daston Posted November 24, 2006 Share Posted November 24, 2006 oh another silly idea (its friday and i am full of them) find a local owner with the stock air box and try that. If the noise goes then its your induction if its still there then worry lol. Quote Link to comment Share on other sites More sharing options...
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