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Model specific boards => Golf mk4 => Golf mk4 TDI => Topic started by: golfwannabe on 05 March 2010, 09:27

Title: Would a split breather / turbo pipe cause MPG to reduce??
Post by: golfwannabe on 05 March 2010, 09:27

Hi Guy's,

As above really - Got some huge split in a breather / turbo pipe - just hisses down the road - Got it booked in for tues (only had car since sat)

Would the split cause MPG to reduce??

Cheers,

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: Jay on 05 March 2010, 13:19

I believe it would as well as the performance.

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: Rhyso on 06 March 2010, 16:43

Quote from: Jay on 05 March 2010, 13:19

I believe it would as well as the performance.

What Jay says

Which pipe is split?

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: golfwannabe on 06 March 2010, 17:06

Haha, Thats the 64 million dollar question - it's booked in for tues to find out. I've noticed that on tickover with the bonnet up that the hiss can be very faintly heard around the turbo area so don't exactly know for sure.

I've also read that it's quite common on the 130 to hear a hiss - is that right???

My MPG is only returning around 34 at the min so something has to be wrong.

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: Rhyso on 06 March 2010, 17:41

deffo a boost leak then

I presume you get thick black smoke when you accelerate too?

Stick you head down by the drivers wheel as its common for it to leak there. 

My bet would be on the red turbo outlet pipe which sadly will rob you of £100

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: Jay on 06 March 2010, 23:29

I wish I could get more than 34 mpg  :grin:

I've averaged over the last 2 weeks, about 460miles (tank not to empty but just above red), mostly in Oxford traffic and at average 23mph with 32mpg  :sad: If I did go for the 1.8T or V6 I'd be raped with 15mpg I reckon :sad:

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: golfwannabe on 07 March 2010, 10:37

Well I definately get smoke coming out the back on hard acceleration - more noticeable at night when you look in the rear view mirror and see it through the car behinds headlights. I don't know if it's thick and black or just greyish. I did see a passat TDI next to me the other day that booted out some thick black crud.

If I had another horrible problem just as a head gasket, surely I would see, hear and smell this on tickover when I put my head down next to the exhaust??

I just think with the hissing and poor MPG it's got to be a boost leak like Rhyso says.

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: silverdog29 on 07 March 2010, 10:43

the turbo hose usually comes loose where one section joins to another the cast lugs break off. Simple fix is to jubile clip both hoses and use a bit of wire to brace them together. I used a coat hanger for the wire

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: Jay on 09 March 2010, 13:33

I very much doubt it's the HG, don't panic yourself by thinking the worst.

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: asif on 10 March 2010, 12:52

So is the slight hissing noise normal as golfwannabe said he was told the 130 makes a slight hissing noise.

When my bonnet is open i can sometimes hear a sort of hissing noise but with all the bloody tractor noises of the diesel I find it hard to tell if it's hissing or normal.

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: asif on 10 March 2010, 13:00

Is there a "how to guide" for how to checks your pipes are leaking?

What I mean is like a diagram/pic of the engine telling you which pipes to check for leaks, as i'm sure there are a few pipes that can leak right?
i know a common one is the one on the EGR but where are the other pipes and where do they end up etc.

Apologies if i'm asking a really dumb question i'm really not mechanically techy at all.

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: Rhyso on 10 March 2010, 13:06

http://www.golfgtiforum.co.uk/index.php?topic=146077.0

I posted up some pics and an idea of where to look for leaks etc

Have the engine running and someone operating the accerlator to rev the car upto about 2500rpm

You then place your hand near all the joints and along the pipes, checking for any air escaping and listening out for any whistling

Otherwise you'd need a boost leak tester but the above should help for the home DIY'er

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: asif on 10 March 2010, 13:14

Cheers Rhyso your a top bloke  :wink:

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: asif on 10 March 2010, 13:30

After reading that other post Rhyso just sent me, is it me or are both the threads asking/talking about the same thing and getting replies to both?

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: Rhyso on 10 March 2010, 13:48

Quote from: asif on 10 March 2010, 13:30

After reading that other post Rhyso just sent me, is it me or are both the threads asking/talking about the same thing and getting replies to both?

you're right

Title: Re: Would a split breather / turbo pipe cause MPG to reduce??
Post by: asif on 10 March 2010, 13:51

Thought I was going crazy or bog eyed :grin: