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Mk5 General Area / Re: Cold Air Intake Fitted - Too Loud? (help)

« Last post by Kodap_MK5 on Yesterday at 01:16:50 pm »

If the DV failed, you would have heard it quite clearly even with the standard airbox setup.  The induction cone will amplify it even with a fully working one.

I could hear a fairly obvious off the throttle 'noise' I have also removed the engine/bonnet insulation as it was knackered so i've ordered a replacement for that too as that will be amplifying the noise. DV probably hasn't ever been replaced so I do have a feeling it will have something to do with it, similar to that post I have shared above.. that is exactly my issue and his issues were totally resolved with a new DV.

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Mk5 General Area / Re: Cold Air Intake Fitted - Too Loud? (help)

« Last post by mjmallia on Yesterday at 01:07:33 pm »

If the DV failed, you would have heard it quite clearly even with the standard airbox setup.  The induction cone will amplify it even with a fully working one.

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Mk5 General Area / Re: Cold Air Intake Fitted - Too Loud? (help)

« Last post by Kodap_MK5 on Yesterday at 01:05:04 pm »

Is it the off throttle 'chatter' noise that is loud? if so that can point to a failed diverter.

Yeah, so it's very loud in all aspects but yeah when you let off the throttle that's when it really sounds like I've got a blow off valve of sorts. Way louder than I remember my previous MK5 being with the Ram Air intake fitted.

I have ordered a rev G DV to replace my existing one just to rule that out, i found this post from many many years ago and this is exactly how I would describe the sound I'm getting, his solution was a new DV so hopefully that resolves it.

https://www.mk5golfgti.co.uk/forum/index.php?topic=106607.0

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Mk5 General Area / Re: Cold Air Intake Fitted - Too Loud? (help)

« Last post by GVK on Yesterday at 12:51:58 pm »

Is it the off throttle 'chatter' noise that is loud? if so that can point to a failed diverter.

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Mk5 General Area / Re: Cold Air Intake Fitted - Too Loud? (help)

« Last post by Kodap_MK5 on Yesterday at 08:58:05 am »

They are a little excessive in noise and a little boy racer in my opinion......getting old 

I sold the open air filter and went BMC CDA which is enclosed and a lot quieter, but after a year or so reverted back to OEM......people are always selling on eBay the original cover/airbox.

I actually do like the intake noise, but it shouldn't be as loud as it is.. I have found a similar thread from 2017 and it looks to be that the diverter valve being replaced completely resolved the problem!

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Mk5 General Area / Re: Cold Air Intake Fitted - Too Loud? (help)

« Last post by mjmallia on Yesterday at 08:19:28 am »

They are a little excessive in noise and a little boy racer in my opinion......getting old 

I sold the open air filter and went BMC CDA which is enclosed and a lot quieter, but after a year or so reverted back to OEM......people are always selling on eBay the original cover/airbox.

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Mk5 General Area / Cold Air Intake Fitted - Too Loud? (help)

« Last post by Kodap_MK5 on May 20, 2025, 10:43:30 pm »

Hi guys,

Just today I have fit my new Direnza cold air intake kit, my engine cover was knackered and thought i'd do an upgrade in the process.

I can't help but thinking since the fitting, it is incredibly loud.. like almost too loud, inside the cabin and outside it sounds almost a bit like i have a blow off valve fitted?

I did remove my engine/bonnet insulation because it was ripped and sagging, but I have also read online it could be a knackered diverter valve, has anyone else experienced this and if so, help me with some solution, it sounds great when you are booting it, but at lower revs it sounds ridiculous!

Cheers

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Mk5 General Area / Re: Issue with newly installed brake upgrade

« Last post by GreigC on May 20, 2025, 12:19:31 pm »

Can you post images of your brakes?

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Mk5 General Area / Re: Issue with newly installed brake upgrade

« Last post by dennis10 on May 20, 2025, 10:53:48 am »

Saw this on a reddit post, do you think this could be the reason?

I suspect the issue is with your caliper piston. They have a slight notch in them so it applies more pressure (or less pressure ) to the leading face , vs the trailing face.

I suspect, since the calipers were rebuilt, the piston was not oriented correctly, and is grabbbing the outer lip more than the inside lip.

This is guessing!

I've attached an article/photo showing orientation, and is based on direction of rotor travel, whether it biases upwards or downwards. Yours seems to be biasing vertically.

This was from a Porsche forum, but can be found in various Mercedes manuals too

Edit : link added https://forums.pelicanparts.com/porsche-911-technical-forum/367970-caliper-pistons-set-way.html

The reddit poster marked that this turned out to be the reason (piston was oriented the wrong way so putting more pressure on the outside edge)  Not sure if this is a thing on mk7 R calipers though?

He also said that he replaced the caliper with a remanufactured one with the piston oriented the right way, and another poster said he could have just twisted the piston round instead of replacing the whole caliper

Reddit post:  https://www.reddit.com/r/AskMechanics/comments/14wqgea/please_help_me_with_these_brakes_new_pads_not/

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Mk5 General Area / Re: Issue with newly installed brake upgrade

« Last post by GreigC on May 20, 2025, 10:47:53 am »

Not sure what side was the faster side at going down. Afterwards they were both equal with a small ring like the second image and stayed like that for ages! Then finally cleared fully on both sides.

I can’t say I noticed a difference in MPG at the time. The brakes always felt fine although was disappointed by the performance initially when installed. Now they are bedded in they perform excellent and I’ve had no issues.