DIAGNOSING THE BOOST LEAK ON MY MK5 GTI (GFB DV+ HOW-TO)

After a poor performance from the MK5 GTI on its recent dyno run, I take one shot at fixing the boost leak, and it worked!! Join me for a quick run through and how to fit a go fast bits diverter valve on the Mk5 Golf GTI. This is a nice easy fix/mod that anyone can do with a few basic tools and 30 minutes.
TIMESTAMPS
Story time : 00:00 - 1:24
Diverter Valve How-to : 1:25 - 6:45
First drive after fitting & Outro : 6:45 - 10:03
OEM Diverter Valves are made using a rubber diaphragm, these got better and better through the revisions but can still fail over time. The DV+ uses a full solid construction, so it won't ever need to be changed again.
I'm Elliott, a driveway car guy who loves modifying! Since my first car 10 years ago I've modified my way through Air Ride, Remaps, Lighting, Exhausts and more! I've decided to start documenting my driveway mods to share the excitement and passion with you guys.
GFB DV+ : jbmperformance.co.uk/products...
Check out my Etsy : www.etsy.com/uk/shop/OverrunG...
#MK5GOLFGTI
#MODIFIEDCARS
#VOLKSWAGEN

[@RykerFive5]

Question! You say it’s on the passenger side but then jack up the drivers side - which is it?’ 🧐

[@overrungarage]

Ooo, very well spotted! It is on the drivers side, my mistake 😅😅I will update the video :)

[@RykerFive5]

@@overrungarage I went to jack up the passenger side and went HANG ON A BLOODY MINUTE xD all good

[@overrungarage]

@@RykerFive5 my apologies! Hope you sorted it in the end and thanks for pointing out the error 👍

[@RykerFive5]

@@overrungarage no worries at all buddy, I realised before going to town on the car - snow kicked in before I managed to fit mine, but I also have turbo back exhaust, shocks and springs, spacers, anti lift kit…. Shit I’ve got a lot to fit xD

[@amirhaynes6016]

It’s on the passenger side in America 😅

[@stevieksstuff2148]

Did mine last week....and the original was completely separated more than yours, my smile was as big as yours being it's my 1st gti and going from no boost tooooo having boost was very happy with the cost to outcome ratio.

[@overrungarage]

The difference is crazy isn’t it! Absolutely, these mk5s are such good bang for buck (when they work!)

[@Flalookawooka]

DV+ made a huge difference to my own MK5 GTI, glad it solved your issues

[@TheTaalman]

Just fitted one on my 2007 Octavia with it stage 1. It had 267bhp 382nm so I’m smiling again my exact same rubber was broken and leaked so it lacked on turbo boost. First I thought hmmm I did put 98 octane in and thought: is the Stage 1 gone? But like said here in 4,5 and 6-th it felt like a normally aspirated engine. Now it’s fast and nippy as hell again. Excellent thing to install.

[@andyseaton7895]

Nice one m8, glad it sorted the boost issue. 👍 The new number plates look so much better too. 👌

[@overrungarage]

Thanks mate, feels like a new car now and those old number plates needed to go!

[@liampadraignagle6784]

Just ordered one of these this morning hoping it will fix my boost issue! Great video 👍

[@overrungarage]

Hope it fixes the issue for you mate! Nice easy fix if it does 😄

[@JuanTorres-fn4ze]

Wooop my OEM Diverter was so gone just upgraded to the GFB as well, fire 🔥

[@virgilvandoorn4733]

Ok im going to buy one today ❤

[@RykerFive5]

Nice work buddy! Going to fit mine shortly but wondered if you had replaced your PCV? This too is a common issue. A symptom for me was poor starts - I bought a PCV Delete kit and it’s gone, may be worth a check :) looking forward to more videos!

[@overrungarage]

I bought the car with a pcv delete kit on it mate, so all good on that front!

[@gabe6152]

@@overrungarage with the pcv delete kit do you run a catch can? i heard if you don’t run one it’ll damage the engine in the long run

[@gabe6152]

with all the excessive blow by

[@jonosvlog9913]

My mk5 also has poor starts in the morning. Does it mean the PCV is out? Cheers

[@user-dk7qg1mm5c]

bro, a question I have a forge relief valve on my mk6 I would like to know if I can add a spacer to the same valve

[@Mitchy9]

Is this GFB DV better than the stock DV valve, got a mk5 GTI myself and it runs fine but was wondering if it was worth upgrading the DV anyway?

[@waqashussain2310]

Around what rpm is your boost now kicking in after the valve ?

[@adamparke878]

Hi! I’ve recently bought a mk5 gti, never commented on a KZbin video in my life but I feel I might have the same problem as you. Seems to have a boost leak but I’ve all pipes tightened and retained in! Any help is welcome, lovely looking motor, tinted tail lights look very smart!

[@overrungarage]

Sounds like a similar issue mate! Such a common problem on these cars, fortunately it's an easy job. I'd buy a new DV before taking the old one off and just replace it even if it wasn't dead as it will inevitably die at some point!

[@dirkdingle7926]

Good vid mate don’t like the chav rear lights but each to there own,I had the forge diverter valve on mine sounded mint but got sick of it eventually,I had problems with mine stalling all the time when coming to a stop so took dv of and all working sweet again

[@RoBFE-fe5dh]

I had a boost leak turn out it was a hole in the intercooler where you couldn't see it with out taking it out or moving the bumper.

[@lewishughes3914]

Think I may have to give this a go myself! Have you had any loss of power issues since? I’ve got a 1.4 GT it seems to pull fine at first but once the engine has warmed up I loose all power when I hit 3000rpm in any gear. It’s getting incredibly frustrating to deal with 😂

[@overrungarage]

Nice easy job to be honest mate! It’s been fine ever since :)

[@donavangragg6018]

Anyone have any misfire issues after their cold air intake install before getting to the dv?

[@seandraine7860]

Hi..so can I just use the spring that came off the standard DV?? Because I fitted the one that came with the kit a couple of days ago and I got the engine management light on there today and am pretty sure thats what it is.

[@Noodellzzz]

Hi mate, I’m not sure why it happens but I ve seen people saying that using the standard spring can help with the eml problem, give it a go and if not save yourself the headache and go for a Rev G standard diverter, they’re actually required by r-tech if you were to have them tune your car 👍

[@hemi265mustard]

Does it make the turbo have better induction whistle and blow off sounds

[@overrungarage]

I think so yes, when you let off the throttle it gives more of a 'blow off' sound. I have a RAMAIR intake so deffo sounds nice!

[@mrwoody6634]

Morning mate, recently got a MK5 gti myself seems to be some sort of misfire and noticed if i try boot it seem to sometimes want to hesitate for a minute then come back on boost? also noticed a like screaming noise from front end when giving it some ? any ideas on what it could potentially be?

[@overrungarage]

What mileage is it on mate? Could be a boost leak somewhere or injectors could be clogged / intake valves full of carbon. Mines currently having the injectors cleaned and valves walnut blasted which will be in next video, I had similar symptoms so will see if this rectifies it. As for the screaming noise probably just turbo whining, probably nothing to worry about if it’s holding boost ok

[@mrwoody6634]

@@overrungarage Its got 163k miles seems to boost but when the screaming noise comes it seems to dimish in boost for a few seconds until it goes someone said maybe the PCV valve or somert.

[@overrungarage]

@@mrwoody6634 yeah possibly mate sounds like a boost leak somewhere , maybe get it smoke tested to check for leaks mate could be so many things with these cars 😅 👍

[@nahimahmed2832]

Have a similar issue with my mk5 gti, I want to try the diverter valve first but bit more worried there is a deeper issue as after 30 mins of driving my car would go into limp mode then start back up and drive normally for another 15 mins and die again. Any advice would be great!

[@Cutandfly]

i had a similar problem with my GTI that bothered me for quite a while. changed out my fuel pump and never came back.

[@nahimahmed2832]

@@Cutandfly did you change the low pressure fuel pump?

[@Cutandfly]

@@nahimahmed2832 yes, in the tank.

[@waqashussain2310]

I can’t really tell if my car is leaking or not , it does have pick up but only sometimes but idk if it’s my driving or the car , and there’s no leak sound but the intake does hiss when acceleration below 2k rpm sometimes , can anyone help or recommend . Many thanks

[@overrungarage]

For me the biggest giveaway was there was no big surge when on boost. It didn’t throw you back in your seat. After changing the DV I noticed it instantly, boosted way harder and healthier

[@waqashussain2310]

@@overrungarage it turns out I acc had no leak at all , I still changed the DV tho but for some reason I hear less from my intake now but the power feels amazing and quite frankly speaking I would pick power over the flutters , the intake still flutters slightly not as much as with the revision G for me . But the car flys , thank you for the amazing content

[@herron121]

Hello, what fault codes did you have come on initially? Thanks

[@overrungarage]

No fault codes mate, just no boost! Found out on the dyno when it ran 140hp 🤣

[@lasaatti1321]

can u describe the problem? my gti is very slow and cant get any boost at all, i have new turbo too

[@overrungarage]

Just felt like there was no turbo kicking in same as you really no boost. Very common problem though !

[@chitila007]

What was the problem?

[@lasaatti1321]

@@chitila007 map sensor and bypass were broken

[@chitila007]

@@lasaatti1321 you have misfire also?

[@lasaatti1321]

@@chitila007 no only loss of power and boost

[@ejtisevn]

Name of the song please?

[@Blingbling820]

How is it 10months later? Any issues?

[@overrungarage]

No issues at all still running sweet 👍

[@prolifik_hussle5972]

What are the wheel and tire specs?

[@overrungarage]

They are dare RS 18x8j with 205 40 18 tyres

[@pangetkasobra4502]

How do u know if ur DV is broken?

[@overrungarage]

There will just be a lack of boost, power delivery will be a lot more linear. Usually when accelerating fast from a standstill you’ll feel the turbo kick in and it’ll ‘throw’ you back in your seat a bit. You won’t get that with a faulty DV.

[@AliHamza-rv2mv]

Uhmm you said behind the passenger wheel but it’s located on the driver side

[@overrungarage]

Aye I realised that mate someone else said the same thing, on the list to take down and re-do, apologies!