chattering sound from 1.8t

[AndyMitton]

Hey...bought a golf gti turbo yesterday. read about on the forum about this chattering noise; but can't come to a definate conclusion, hence the post...when i lift of it almost gose ch ch ch ch...if you get me. not one long pssshhht.  i guess the boost recirculator is at fault???  is this going to do any damage to the engine/turbo. going to replace if is the problem. but not got time at moment. it doesnt happen in neutral (i.e no load) and only hear it quite faintly when the window's open...unless there is already a DV on it?lol  also if i got for a dump to atmosphere DV, which one is the most discreet. only want a very faint sound. Thanks a lot guys. Andy

[topher]

Couple of simple rules with that

atmospheric dv = nono. if you want to hear a noise when you change gear then get a bigger turbo inlet pipe and an induction kit (no oiled filters though)

standard plastic bosch dv from vw = cack - replace with a piston type (e.g forge 007p)

[AndyMitton]

Couple of simple rules with that

atmospheric dv = nono. if you want to hear a noise when you change gear then get a bigger turbo inlet pipe and an induction kit (no oiled filters though)

standard plastic bosch dv from vw = cack - replace with a piston type (e.g forge 007p)

cheers for the fast reply. would said unit be the cause of the chattering i mentioned? Thankkks!

[topher]

I'm tempted to say definitely yes... but without a diagnostic reading it's not possible to say for sure. Could be hearing wastegate chatter which could mean one of the solenoids needs replacing.

[AndyMitton]

solenoids? which ones? are they expensive? Thanks mate

[topher]

There are 2 main culprits, the N75 (hangs off a little vac hose near the dv) which is inexpensive and the other... n7...something (memory failing here) which is nearer the block and more expensive. I wouldn't replace those though without a diagnostics computer saying so. The DV though, i would recommend replacing the stock item even if it wasn't faulty.

[AndyMitton]

nice one i will do. should there be any noise heard from the wategate/turbo on lifting off the accelerator or not? hope its not something expensive!

[AlanD]

forge 007p on ebay for £80, I've read some half decent things about them so worth getting.

[AndyMitton]

ill check that out. seems this "fluttering" sounds im having would be caused by the valve and not the solenoid. i like it though.lol

[AndyMitton]

the boost also sounds pretty loud when the window is open? is it normal to sound loud? and if i take engine cover off and rev it, would the noise come from the DV or further down? It sounds like more a something fluttering than a chattering, if you follow me?