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SpennyUK71
Newbie


Joined: 29 Jan 2018
Posts: 24
Location: Taunton, Somerset


PostPosted: Mon Aug 26, 2019 7:49 pm    Post subject: Underside Cleaning Advice Reply with quote

Hi all

Can anyone recommend any products or techniques to help remove the baked on oil/dirt on the underside of my C4?

I have used a pressure washer and scrubbing brush with the likes of Gunk, Auto Glym engine cleaner and Meguiars APC, but I am still struggling as the photo will show.

Any advice would be greatly appreciated Thumb
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2002 996 Carrera 4 Tiptronic
 



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Alex
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 16682
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Mon Aug 26, 2019 7:51 pm    Post subject: Reply with quote

Here:

http://911uk.com/viewtopic.php?t=125818
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2000 Manual 996 C4 Arctic Silver Convertible


 
  
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SpennyUK71
Newbie


Joined: 29 Jan 2018
Posts: 24
Location: Taunton, Somerset


PostPosted: Mon Aug 26, 2019 8:24 pm    Post subject: Reply with quote

Thanks Alex thumbsup
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2002 996 Carrera 4 Tiptronic
 
  
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MisterCorn
Dijon


Joined: 08 Jan 2011
Posts: 7209
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Mon Aug 26, 2019 8:26 pm    Post subject: Reply with quote

That soda blasting looks superb.

MC
 
  
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takeflight
Newbie


Joined: 28 Nov 2017
Posts: 28



PostPosted: Mon Aug 26, 2019 8:34 pm    Post subject: Reply with quote

I,me sure I have seen on YouTube someone using a jet wash patio cleaner inverted. Never tried it but thought it was a good idea.
 
  
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Zingari
Donnington
Donnington


Joined: 25 Oct 2009
Posts: 12903
Location: Cheshire

1993 Porsche 964 Anniversary

PostPosted: Mon Aug 26, 2019 10:21 pm    Post subject: Reply with quote

Isn't that light brown stuff the original colinite that was applied by the factory Question
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The game's afoot. It's time to put a bit of (Colini) stick about......Why RUF when you can WUF
 
  
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NLW73
Albert Park


Joined: 27 May 2014
Posts: 1512
Location: Yateley


PostPosted: Tue Aug 27, 2019 9:38 am    Post subject: Reply with quote

drive it more and in the rain.

wont have to worry then Very Happy
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997 C2s Schwarz
 
  
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TurboRob
Trainee


Joined: 18 Feb 2019
Posts: 82



PostPosted: Tue Aug 27, 2019 12:24 pm    Post subject: Reply with quote

Soda blasting looks good for the ally.

I've found TFR and clean brake cleaner + plenty of elbow grease get's the ally clean too.

For the rest of the underside a long handled brush, TFR and a RSI did the trick.
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996.2 C2
 
  
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hermes
Silverstone


Joined: 08 May 2017
Posts: 111



PostPosted: Tue Aug 27, 2019 2:43 pm    Post subject: Reply with quote

That light brown stuff looks like the original Porsche coating. No need for that to come off other than for display purposes?

Brake cleaner quite effective on oily stuff. I also use Bilt Hamber degreaser stuff (forget the name), followed by some corrosion protection.
 
  
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Counter Of Beans
Spa-Francorchamps


Joined: 10 May 2018
Posts: 333
Location: Hampshire


PostPosted: Tue Aug 27, 2019 5:22 pm    Post subject: Reply with quote

Bilt Hamber Surfex HD is the best degreaser / all purpose cleaner that I've used.
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I'm Mike and I count beans for a living.
 
  
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SpennyUK71
Newbie


Joined: 29 Jan 2018
Posts: 24
Location: Taunton, Somerset


PostPosted: Tue Aug 27, 2019 7:11 pm    Post subject: Reply with quote

Zingari wrote:
Isn't that light brown stuff the original colinite that was applied by the factory Question


Could be, I didn’t think of that!
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2002 996 Carrera 4 Tiptronic
 
  
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Chris_in_the_UK
Estoril


Joined: 19 Mar 2014
Posts: 3585
Location: Harrogate


PostPosted: Tue Aug 27, 2019 7:47 pm    Post subject: Reply with quote

Zingari wrote:
Isn't that light brown stuff the original colinite that was applied by the factory Question


Yep.
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2006 Cayman S PCCB's
 
  
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