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C4-STORM
Hockenheim


Joined: 29 Aug 2017
Posts: 630
Location: Hampshire

2004 Porsche 996 Carrera 4S

PostPosted: Sun Mar 03, 2019 12:16 am    Post subject: Header tank breather valve problems replacing Reply with quote

Evening all.

I need help with removing and replacing header tank breather valve please!!

Bolts are showing signs of minor surface rust but upon removal the bolt heads are literally falling off..

Can’t drill them out as they are housed in plastic.

Please don’t tell me I will need to drain the coolant, drop the engine and remove the header tank 😩

I am at the point where I can leave it alone but I am not happy knowing these bolts are all rusted away (and there’s only 4 left holding it on)...

Any other ideas guys??
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Mac996t
Nürburgring


Joined: 26 Mar 2011
Posts: 480


2004 Porsche 996 Turbo

PostPosted: Sun Mar 03, 2019 1:09 pm    Post subject: Reply with quote

Erm, that look like a right pain. It’s a bit hard to tell from the pic but if the bolts have snapped just below the heads there may be enough left sticking out once the black valve body is removed to get some grips on them. Trouble is you are committed once you do!

Ps what was your reason for removing them, it doesn’t look like the valve was leaking?
 
  
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alex yates
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 15541
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sun Mar 03, 2019 1:15 pm    Post subject: Reply with quote

Easy to remove. Can buy a decent used header tank for £75 or new for around £100. Personally I can't see rusty bolts seized in plastic and seizing. Most likely they're seized in a steel insert in the plastic.

https://www.ebay.co.uk/itm/PORSCHE-911-996-EXPANSION-TANK-PORSCHE-996-CARRERA-HEADER-TANK-/292848927214



Open Youtube Page

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2000 Manual 996 C4 Arctic Silver Convertible


 
  
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 8140
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Sun Mar 03, 2019 2:02 pm    Post subject: Reply with quote

As said, it would be easier to change the header tank, there is every chance you fix this one and then the tank starts to split. Change the tank and eliminate any future issues.
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C4-STORM
Hockenheim


Joined: 29 Aug 2017
Posts: 630
Location: Hampshire

2004 Porsche 996 Carrera 4S

PostPosted: Sun Mar 03, 2019 7:06 pm    Post subject: Reply with quote

Thanks guys.

That video makes it look fairly straightforward..

The annoying thing is I don’t have a leak. Went to remove 1 bolt as it was rusty. Should have just left alone! My bad nooo
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kurlykris
Indianapolis


Joined: 30 Jun 2014
Posts: 2326
Location: Warwickshire


PostPosted: Sun Mar 03, 2019 7:41 pm    Post subject: Reply with quote

Looking at the parts if you buy a new bleed valve, they look like self tapping screws.
I would be inclined to have a go at getting them out, but then I am an engineer Grin


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1998 996.1 C2 3.4 with "Aerokit Cup"
2006 Boxster S sport chrono
2010 Mercedes E350 AMG Sport

 
  
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C4-STORM
Hockenheim


Joined: 29 Aug 2017
Posts: 630
Location: Hampshire

2004 Porsche 996 Carrera 4S

PostPosted: Sun Mar 03, 2019 9:19 pm    Post subject: Reply with quote

Hi Kris.
That’s what I would like to do and I have the valve kit/new screws which you have shown.
I started to try and drill out one of the screws threads I could access the easiest but it wasn’t working out too well tbh.
Access is so limited that the header tank needs to come out really I think.
I’ve left it all alone for now, plugged the holes with gasket sealant and cleaned it all up - just to tidy.
Nothings leaking at the moment, I’ll keep an eye on it!
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infrasilver
Fast & Furious
Fast & Furious


Joined: 04 Oct 2010
Posts: 8140
Location: East Midlands

2001 Porsche 996 Targa

PostPosted: Sun Mar 03, 2019 9:28 pm    Post subject: Reply with quote

If you do just change only the.part that Kris posted just cut through the left over bolt heads and scrap everything that's not supplied in the kit, you can undo the screws shafts with mole grips then.
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kurlykris
Indianapolis


Joined: 30 Jun 2014
Posts: 2326
Location: Warwickshire


PostPosted: Sun Mar 03, 2019 9:33 pm    Post subject: Reply with quote

Yeah exactly what I was thinking Chris Grin
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2006 Boxster S sport chrono
2010 Mercedes E350 AMG Sport

 
  
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C4-STORM
Hockenheim


Joined: 29 Aug 2017
Posts: 630
Location: Hampshire

2004 Porsche 996 Carrera 4S

PostPosted: Sun Mar 03, 2019 10:09 pm    Post subject: Reply with quote

I’ll give it a go, it’s hard to get in there though.

Thanks for the comments chaps Thumb
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alex yates
Le Mans
Le Mans


Joined: 06 Mar 2014
Posts: 15541
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sun Mar 03, 2019 10:10 pm    Post subject: Reply with quote

kurlykris wrote:
Yeah exactly what I was thinking Chris Grin


Snap.
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