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51
Mk5 General Area / Re: Temp gauge dropping when heaters on
« Last post by Mk5gti on August 28, 2025, 08:12:16 am »
So my issue is the needle drops when I turn heaters on
Both thermostats have been done and temp sensors using genuine parts, while driving the needle doesn’t drop, the needle will only drop at idle with heaters on
52
Mk5 General Area / Re: Temp gauge dropping when heaters on
« Last post by crookedd on August 28, 2025, 08:08:09 am »
I had the same issue years ago. Also car never reaching 90 degrees fully in winter or dropping from 90 when constant highway speeds. Issue was thermostat.
53
Performance Modifications / Re: Cracked air filter housing on engine cover
« Last post by Joeb3006 on August 28, 2025, 07:06:59 am »
I agree. I'd stick to the std intake and use a good quality std filter and just change it every year. The std intake gets nice cold air right from the leading edge of the bonnet, most "cold air" kits seem to get the air from inside the warm engine bay  :stupid:. The same intake was used on other VAG group cars so you don't have to stick to a VW one.

A stage1 tune really does make a difference, I had a Superchips Bluefin one on mine and it's been perfect and really gives a nice load of mid range wallop for overtaking, I found as std the car felt a bit flat. If the cars been as well maintained as you say then I wouldn't worry having a stage 1 tune added as long as it's by someone reputable.

R8 coils are mainly cosmetic, buy them if you want if yours fail but otherwise I'd leave them alone and save your money.

Worthwhile checking the HPFP cam follower but if it's done over 245k then someone's been changing it in the past, same with the oil pick-up, if it's had it's oil changed every 6k then sludge is unlikely to be a problem.

Good luck.
That’s perfect thanks. I have a good tuner by me who specialises in VAG so I’ll be taking it to them when I get it done!


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54
Performance Modifications / Re: Cracked air filter housing on engine cover
« Last post by Joeb3006 on August 28, 2025, 06:35:42 am »
Welcome,

That's a whole lot of views on your post and not a lot of answers !

I'd 100% be fitting an uncracked standard intake. There will be plenty on ebay. Fix what you know is broken right? If keeping the intake standard, fit a OEM Edition 30 filter. It's a little thinner than the standard GTI one. I've toyed with the idea of a CAI system, but I really do not want additional noise or to lose the engine cover. Standard airboxes are good for quite high BHP figures anyway.

I'd not bother with R8 coils, unless you want the aesthetic of the red when you open the bonnet. I went for standard OEM coils. What will benefit you in that area is a set of iridium spark plugs. I forget the make, NGK maybe? I could look that up if you need.

Stage One remaps really wake these things up. Just beware that a worn clutch will manifest itself fairly quickly post remap. I faced this problem and opted to fit the TTRS clutch unit with new flywheel. Expensive, but totally OEM feeling and good for a fair bit of power. I'd not worry about mileage covered on the engine already though. If it's been maintained it'll likely be fine.

In regard to maintenance, which I'm just throwing in here, has the engine had the sump dropped and oil pickup replaced? Has the cam follower been checked / replaced? Please consider these prior to anything else, as they're a potential killer of these engines.

Good luck !

Thanks for the reply! I appreciate the insight and you passing on your knowledge
I’ll stick to the standard one, as I too like the look with the engine cover.
As for the maintenance. I’ve actually replaced the cam follower, PCV valve and pipes, the charcoal canister and EVAP purge valve, and I have had the sump off and replaced the pick up and the oil pressure switch.

I know it’s overkill but reading all the “common” issues with the car I wanted to get them all done and out the way so I didn’t have to worry.

As for tuning. With you explaining the engines are strong, I think I’ll go for a stage 1. I don’t push it often but like you say, when I want to, that little bit extra power will be nice!

Thanks for getting back to me!

Happy motoring
55
Mk5 General Area / Re: Temp gauge dropping when heaters on
« Last post by Mk5gti on August 28, 2025, 01:59:32 am »
Hi, did you ever resolve this issue and what was it?
56
Mk5 General Area / Re: Oil pressure warning light switch off engine!
« Last post by GVK on August 27, 2025, 11:27:55 pm »
 :P :P :P
57
Mk5 General Area / Re: Oil pressure warning light switch off engine!
« Last post by Kano2021 on August 27, 2025, 09:49:46 pm »
13 year old thread, doubt they are around here any more.

I know i know, but was worth the ask in case anyone wanted to comment on it (like you did)  :signLOL:
58
Mk5 General Area / Re: CDL Swap on MK5 GTI
« Last post by Kano2021 on August 27, 2025, 09:47:19 pm »
Complete CDL engine with turbo, intake, dv etc, CDL ECU, and if you want to save yourself the hassle of re-coding your instrument cluster, get the cluster from the cdl donor as well. Wiring should be the same between both engines so no need to swap anything there.

Your overall best bet is to get a cdl engine donor car and swap everything necessary, rather than swapping them piece by piece. If you only want to go stage 2, keep your bwa or fit 2nd hand injectors and k04 on it. A set of brand new injectors and a 2nd hand k04 will cost almost the same as an entire cdl engine

You need just the engine, including k04 kit and injectors. No need for ecu or clusters regarding immo.
Technically, minimum parts you could just get block (bottom half) of engine CDL/BHZ with k04 and injectors.
However you will need to flash the ECU with a stage 2(+) map to get it all running smoothly
59
Mk5 General Area / Re: CDL Swap on MK5 GTI
« Last post by Kano2021 on August 27, 2025, 09:41:33 pm »
I have bought a MK5 GTI BWA with DSG, I want to CDL Swap the car and perhaps in the process stage 2 it aswell. I was wondering what would be required to do the swap and what would need to stay from the BWA engine?

How much you getting the CDL for, and is it bare block only or with full auxiliary’s??
Might have a K04 kit available if you need, including injectors. However will have to confirm if still available
60
Mk5 General Area / Re: Oil pressure warning light switch off engine!
« Last post by Kano2021 on August 27, 2025, 09:34:17 pm »
Yea I noticed that initially, but thought was worth the ask anyway  :signLOL:
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