GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: gazzagtiT on 28 March 2004, 20:55
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Hiya fella's,
ive noticed a noise during accelration, its been on the car since i bought it 4 months ago but i think it's getting worse(or maybe its just me imagining things)
Its louder in first gear, il accelerate, an as soon as i relaese the pedal i can here like a spinning sound from the engine bay, but it sounds more rattly then a smooth sound of a turbo re-spoilin(if thats a word)
it continues to sound when i release the pedal in second and third.
its a 99 1.8 t
i appreciate the old mechanics responce "cant say untill ive seen it" but just wondered if there was any ideas or anyone heard the noise b4!
cheers guys! ???
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You still running the stock diverter valve ? Those plastic bosch things aren't fantastic, get a nice alloy one for about 75 notes ;D
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yeah sounds like your divertor valve is deffo on way out, these can cause boosty probs for some reason when they fail so get one like what topher suggested matey!!
gaz
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This is my first turbo car, so go easy on the lingo, i take it thats part of the turbo that could do with replacing! easy d.i.y. jobie or specialists?
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its not a major job, i havent got a turbo golf so i cant tell you exactly, but they are the same as a dump valve and it is located between your plenum chamber and your inter cooler i think (someone will correct me if im wrong) these just release excess turbo pressure when you back off the throttle and divert the pressure back in to the airbox i think?, they help your turbo spin up quicker and dont strain the fins on the compressor turbine with back pressure int he system, have a word with topher or some one else whos fitted one, i think there a diy job but get it done cause if faulty you can loose boost pressure as it can leak back into the air box so youll not get full whack!!
Gaz
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http://www.eurosportacc.com/diverter.htm
like one of these, its making sense all ready ggod price? ::)
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yeah defo get a dv i lost all boost when mine went and died on me. a got the one in your link a bailydv30 very good stuff or if you perfer get a forge 007 both are top quality. it takes about 10 min's to fit. if you take off your plastic engine cover and look top right of the engine you will see a black plastic valve type thing and it just a case of taking the 3 pipes of and puting in the new dv getting the metal vw clips are the hardest part. nice easy start to your gtiT mod's. oh and there about ?90/?100.
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seems like I've got the same problem ... turned my stereo down on Sunday to hear this rattly sound after I took my foot off the accelerator pedal. Initially thought it must have been a lose cable but reading the first link it does sound like the Diverter Valve.
Do I need to get the VW clips or can I use something else?
The link is for a US site - does anyone know of any good places to get the DV from in the UK?
Cheers
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Buy jubilee clips for the bigger hoses (should be available from the stealer). If you are lucky you may be able to pull the vacuum pipe off the old valve without disturbing the clip and then reuse it on the new valve.
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if you dont want to hear the psshhhhh niose after every gear change like that of a rs turbo or subaru, make sure you get a reciurcilating dv. your car is set up to run that sort so it will run smoother as well. baily dv30 or forge 007 are best.
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if your still getting a strange niose after changing the dv it may just be your wastgate chattering which is not a prob..
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Thanks for all the advice .. even went to the trouble of asking my insurance company whether it would be ok to install an alloy dv and they said as long as it doesnt increase performance then yes.
The offical line from Forge Motorsports was that it should produce a smoother gear change by stopping turbo lag.
So purchased FMCL007P Fast Road Closed Loop Diverter Valve (piston) from Forge Motorsports. Should arrive Monday - show pics after its been done.
Gazza - let me know how ur gettin' on?
Cheers
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yeah cheers fella's i thight starry might have the answer cheers fella,
pappa, how much was yours?
the one u bought is that one in the link i put on here or dif?
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>The offical line from Forge Motorsports was that it should produce a smoother gear change by stopping turbo lag.
The unofficial line being that (unless you're talking high boost applications) dump valves are a waste of time other then for accoustic pleasure. VW's will surely have a recirc valve or silent dump to atmos???!!
Also- wastegate chatter IS a problem, you'll be leaking boost each time it chatters i.e. it's not sealing so it's venting boost on each open/close cycle. Probably marginal - but all the same, losing boost.
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So purchased FMCL007P Fast Road Closed Loop Diverter Valve (piston) from Forge Motorsports. Should arrive Monday - show pics after its been done.
Dave - although people have incorrectly referred to it as a dump valve, the Forge item is a recirculating 'diverter valve' that replaces the standard VAG/Bosch 'boost valve'. It is not a vent to atmosphere device - leave those to barry boys in RS turbos!!
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yeah cheers fella's i thight starry might have the answer cheers fella,
pappa, how much was yours?
the one u bought is that one in the link i put on here or dif?
Gazza - I bought one from Forge Motorsports for ?80. I read a couple of reviews and its seems to fit the bill and not that difficult to install.
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let me know how it goes mate, an ill wait for pay day an get mine!!
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http://www.forgemotorsport.co.uk/vw18t.asp?cat=vw18t&catalog=vw18t
Whats the difference between the 006 and 007 i no it says "piston" but how does it effect the car? anyone? ???
Well getting into this turbo stuff now its so easy to fit aswell!! ;D ;D :P
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The reason why piston ones came about was because they are more reiable, and some cars cannot run witht the Diaphragm stylke ones.
I remember on my old Punto GT turbo, you had to use the Piston dump valve as the Diaphragm type would allow air past and would mean the car would'nt idle. This was cured by the piston D valve.
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Now fitted my DV. Left pics at home along with my body this morning!
Its funny ... from what you read on instructions it should be easy. Things that I found weren't quite like the instructions ...
- The clips on the hose's were all fixed in (no screws to undo them)
- The small vacuum pipe was smaller than the nozzle it had to go on, so a little improvisation was in order (see pics)
The rattley noise seems to have gone, so it looks like it cured the problem.
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you dont sound to impressed wiv it, any smoother? quicker? was it a right pain in the back side then?
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you dont sound to impressed wiv it, any smoother? quicker? was it a right pain in the back side then?
Gaz - the new DV valve has cured the problem. If anything the gear changes are slightly smoother. I'll post the pics on the forum tonight.
It was a pain but probably worth it in the end.
:-)
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Hi chaps,
read all the replys on this subject and it seems i have the same prob. scince i bought the car 3 months ago ihave had a hissing noise increasing as i accelarate i thought this was the turbo spinning up but yesterday this noise is followed by a pshh when i change gear.
when the car is out of gear and rev the engine the noises are hardly noticeable, could anyone confirm its the DV before I shell out 90 quid
cheers
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check for split pipes. if you cant find any then its most likely your dv. its a sensible upgrade any way as they will usely let you down in the end.
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THANX MATE, I WILL TRY THIS OVER THE NEXT COUPLE OF DAYS
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Guys, I have added my pics of the DV installation to my gallery. Let me know
what you think?
The total price for the DV was ?102
I've also contacted Motor Sports to let them know that the small vacuum pipe at the top of the valve doesnt fit the pipe from the car. They're going to check this and get back to me.
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Well ive done mine now aswell, was never gonna take me 10mins, it took me over an hour to get the left pipe off!! plenty of nicks an scratches a blister an 3hours later, i had it off!! (the valve that is) Replacing it with the new one is the easy bit! the top hose barely fits, but if ur carefull an dont keep taking it off an on, otherwise the ends just split, its just about ok. As for performance i think it is a lot smoother an seems to be a slightly faster pickup after a change of gear, BUT maybe its just me but i think i can still hear the noise!!!! but it does seem quiter. I think il look into the wastgate bit that had been mentioned in this link, can anyone advice me on where abouts it is an what to look for, is it just a case of locating an cleaning, or will it need replacing???? ???
Still very happy with myself for doing the job without losing my temper he he he ;D