Author Topic: Rust hotspots on a mk4  (Read 415 times)

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Offline superfueler

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Rust hotspots on a mk4
« on: October 08, 2020, 04:51:42 pm »
So, after looking at Dr Youtube and Dr Google, i have decided to look at and corrosion treat the o'l R32 in the areas prone to rust on a mk4 golf using some Ardrox AV15 corrosion compound.

Two areas are prone to rust, around the tailgate open latch and around the inside bottom of the front fenders.

Removed the tailgate inside cover and inspected, still looked brand new. Applied the corrosion compound and closed up, no issues.

When removing the inner fender guards to inspect and treat the aft lower area, all i can say is WOW!! The mountain of moist dirt and debris that came out of those inner fender areas left me baffled, this car doesn't go anywhere near dirt roads so i was amazed, and not in a good way. All cleaned out nicely, i applied the compound and closed up.

Anyone with a mk4 golf, TRUST ME, open up those fender guards and get all the cr@p out of there and put some corrosion treatment in there, it WILL rust out if not attended to.









Now she's happy again.  :D
« Last Edit: October 09, 2020, 01:45:51 am by superfueler »
Current: 2010 Audi A4 2.7 TDI silver, 2017 Ford Ranger 3.2 Px2 DC frozen white.
Past: 2004 Golf R32 black pearlescent, 2009 Audi S3 white, 2004 Audi A4 B6 1.8T blue, 99 Golf mk4 GTI black, 2005 Audi A4 B7 2.0T black.

Offline mitchr32

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Re: Rust hotspots on a mk4
« Reply #1 on: October 08, 2020, 05:56:08 pm »
going to do this to mine soon-ish when I get the time, work and school bashing me hard atm lol
2003 Golf R32 4dr - Deep Black Pearl

Offline 80 Vert

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Re: Rust hotspots on a mk4
« Reply #2 on: October 10, 2020, 08:46:35 am »
It's from all the crap on NZ roads.
None of the fresh from Japan cars have this in my experience, only cars that have been in NZ for some time.
2010 T5 Transporter TDI  Tuned by Superior Tuning NZ
2003 Jetta Coupe soon to be R36TT
1991 Golf GTI 2.0 TSI swapped
1963 Type 34 Karmann Ghia, turbo 2.0
1990 Porsche 964 911 Carrera 4
1980 1303 Beetle vert, under restoration

Offline superfueler

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Re: Rust hotspots on a mk4
« Reply #3 on: October 11, 2020, 12:22:05 pm »
Seems that way yes. That was 127 000 kms of buildup in there, 35 000 kms of those being NZ roads in the last 5 years since the car arrived.

I almost left this task for the future sometime thinking it'll be fine  :D  I am glad i didn't.

Does the mk2's, mk3's and mk5's have the same area behind the wheel arch inner fenders in which muk buildup can occur?, i would guess yes?

Current: 2010 Audi A4 2.7 TDI silver, 2017 Ford Ranger 3.2 Px2 DC frozen white.
Past: 2004 Golf R32 black pearlescent, 2009 Audi S3 white, 2004 Audi A4 B6 1.8T blue, 99 Golf mk4 GTI black, 2005 Audi A4 B7 2.0T black.

Offline GLIDN

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Re: Rust hotspots on a mk4
« Reply #4 on: October 12, 2020, 11:24:11 am »
Seems that way yes. That was 127 000 kms of buildup in there, 35 000 kms of those being NZ roads in the last 5 years since the car arrived.

I almost left this task for the future sometime thinking it'll be fine  :D  I am glad i didn't.

Does the mk2's, mk3's and mk5's have the same area behind the wheel arch inner fenders in which muk buildup can occur?, i would guess yes?



yes, almost all the Golf's, jetta's etc have this issue. mk2-mk7
Audi A4 DTM - Stock NZ New | All servicing done | Carbon Clean done
Gone - VW Tiguan | APR Stage 1 | Stage 2 DSG | Tuned by HSP Tuning