GolfGTIforum.co.uk
Model specific boards => Golf mk6 => Topic started by: MBCGTI on 13 July 2012, 15:32
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Ive read on vagtech.com that if I am looking to up the power through a remap that they recommend that I replace to standard BOV with the forge upgraded version.
Ive found one on ebay for half the cost of the original price and wondering whether this is worth while mod or whether this will be a full on dump valve? I dont mind a little more noise but dont want some horrible dump valve noise you hear on some motors.
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the diverter valves on pre may 2009 tsi engine cars were the diaphragm variety (rev G) and prone to splitting on mapped cars, the revision D overcame this, there is now a new version for tsi cars this from this year (can also fit the KO4) which JKM highlighted on their fb page, that said the dv on wifes car is fine and done 50k now and its mapped
new one on left rev d on the right
(https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash3/580888_433028503404594_95795469_n.jpg)
forge one needs servicing every 5k and given its location on the ihi tai of underneath is a pain in the a$$
depending on age and mileage may be wise to change it as a precaution to a later oem one, maybe worth giving jkm a call
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So I take it on my 09 plate with 29k on the clock it will be the one on the left that I currently have fitted?
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you may have the rev d on the right which is fine, the one on the left is the new one
this is my rev G from the scirocco when it split
(http://i382.photobucket.com/albums/oo261/wigit71/tfotfn/DSC02116.jpg)
ironically revo diagnosed a boost leak on data logging on stage 1 (as rocco was going to go stage 2), VW dealer said no boost leak and were then sent this picture given they could not be bothered to remove it and look
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Mines a 06F 145 710G like your scirocco one, my GTI was built week 7 2010 , has 8000 miles on and I'm 95% sure mines split.(see my oil leak thread)
What's the new new revised versions number as I will tell them when mine goes in if its that fit the new version.
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sorry Snoopy i've not got the part number for the latest one
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Thanks anyway as I did not know about the new one.
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Thanks anyway as I did not know about the new one.
i picked it up on JKMs Facebook page so may be worth giving them a call
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They seem to launch a new revision every 6 months :rolleyes:
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Hey Guys
Im not sure this D revision is all its cracked up to be...I have a MK5 GTI and went from a C revision which split on stock levels to a D revision for a stage 1 remap.
I have since bought a G revision and this holds boost better than a D. The D revision can leak as there cant be a great seal between plastic and metal...and smoke tests have shown new valves to leak.
This has also been confirmed with logs of N75 waste gate actuator having to work harder to achieve the same boost levels, reducing efficiency when compared with the G revision valve.
The VW dealer I spoke to said the only difference between the older Diaphragm valves and the G revision was manufacturer and if someone with a MK6 GTI came in looking for a part the system would highlight the G valve as the correct part.
I dont know how much this G valve will last before it possibly splits so I am going to relocate my Diveter valve into the position used in the ED30/S3/GOLF R which is at the front of the car which will provide two benefits:
- Move the valve further away from the heat source of the Turbo.
- If the valve splits again, its 3 bolts to remove accessible from opening the bonnet rather than a ramp job and awkward removal off the turbo or labour charges at a garage.
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As I posted mines a G version with stock levels and Its showing all the symptoms of been split. Not good for a car that's 2 years old and only done only 8000 commuter miles :undecided:
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Its not great is it.
You can try a D and it will probably be ok, I reckon mine was ok for maybe a month or two.
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Im on my 4th....
Also there is no "BOV" for this car. There is a Forge Spacer. I had one on my car before the K04. It gets old quick... Kinda ricey..
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I take it that forge dont make a decent revised BOV that wont split and wont need to be sorted all the time?
As for relocating the original is this quite a lot of work? Im not hugely experienced on engines, more simple mechanics and dont want to start messing around when I dont know what im doing.
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It's strange the way some people seem to have loads of failures when others don't have any.
I had the original "B" version in my MK5 GTI, ran Bluefin Stage 2 for 4 years 70000 miles and it was still ok when I sold the car.
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I take it that forge dont make a decent revised BOV that wont split and wont need to be sorted all the time?
As for relocating the original is this quite a lot of work? Im not hugely experienced on engines, more simple mechanics and dont want to start messing around when I dont know what im doing.
Forge do both a Blow off valve and there own version of VW's recirculation/Diverter valve. There is some small periodic maintainance associated with the Forge valves.
The relocation job can be done with oem parts from the dealer and its not a big job, heres a link to a fella who did his own version of the relocation - this is the same setup found on the KO4 engines.
http://www.mk5golfgti.co.uk/forum/index.php/topic,17736.0.html
Your not making drastic changes to the way it works your just moving it further towards the intake manifold and blanking off the old dv location.
If you got a garage to do it its probably an hours labour but once its done you will now have easy access to both the Diverter valve and the PCV system which as we all know can be a common problem on these cars.
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I take it that forge dont make a decent revised BOV that wont split and wont need to be sorted all the time?
As for relocating the original is this quite a lot of work? Im not hugely experienced on engines, more simple mechanics and dont want to start messing around when I dont know what im doing.
Forge do both a Blow off valve and there own version of VW's recirculation/Diverter valve. There is some small periodic maintainance associated with the Forge valves.
The relocation job can be done with oem parts from the dealer and its not a big job, heres a link to a fella who did his own version of the relocation - this is the same setup found on the KO4 engines.
http://www.mk5golfgti.co.uk/forum/index.php/topic,17736.0.html
Your not making drastic changes to the way it works your just moving it further towards the intake manifold and blanking off the old dv location.
If you got a garage to do it its probably an hours labour but once its done you will now have easy access to both the Diverter valve and the PCV system which as we all know can be a common problem on these cars.
I take it with the forge dump valve will require cleaning or is it something more than that? Seems strange that if it is an uprated part then it takes more looking after than the original.
Im quite tempted to run a stage 1 remap with the original and just keep and eye, is there any signs that the valve is going wrong? Things to spot??
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There's a long thread on the MK5 forum discussing the differences between the rev d, g and Forge variant
http://www.mk5golfgti.co.uk/forum/index.php/topic,50463.0.html
Seems to pros and cons for each option.
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I take it that forge dont make a decent revised BOV that wont split and wont need to be sorted all the time?
As for relocating the original is this quite a lot of work? Im not hugely experienced on engines, more simple mechanics and dont want to start messing around when I dont know what im doing.
Forge do both a Blow off valve and there own version of VW's recirculation/Diverter valve. There is some small periodic maintainance associated with the Forge valves.
The relocation job can be done with oem parts from the dealer and its not a big job, heres a link to a fella who did his own version of the relocation - this is the same setup found on the KO4 engines.
http://www.mk5golfgti.co.uk/forum/index.php/topic,17736.0.html
Your not making drastic changes to the way it works your just moving it further towards the intake manifold and blanking off the old dv location.
If you got a garage to do it its probably an hours labour but once its done you will now have easy access to both the Diverter valve and the PCV system which as we all know can be a common problem on these cars.
I take it with the forge dump valve will require cleaning or is it something more than that? Seems strange that if it is an uprated part then it takes more looking after than the original.
Im quite tempted to run a stage 1 remap with the original and just keep and eye, is there any signs that the valve is going wrong? Things to spot??
I believe the Forge Recirc valve needs periodic greasing.
Your valve may be torn now, if you have ramps or stands you can look under the car and see what revision you have and check it at the same time. Either way failure is likely to increase with a remap - but dont let a torn DV stop you remapping. If anything replace it when you have it mapped.
Its difficult to say when you have an issue as the valve doesnt so much fail in the sense its failed to open or close properly its the leaking boost which will reduce performance and I have found that it does have a reasonable impact on peformance particulary in holding boost.
Other than periodic checking the only reliable method of measuring the problem is with a boost gauge so if you have one of those fitted you will be alerted to potential issues earlier.
Sometimes this code may be thrown:
16683/P0299/000665 - Boost Pressure Regulation: Control Range Not Reached
But this code could mean several issues with the turbocharging system so its one of a few possiblities.
Best thing to do is periodically check the DV and lament VW's designing!