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306 Dturbo


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11 replies to this topic

#1
stumpyjag

stumpyjag
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Joined: 21 Apr 2010
  • Location:Ludlow, Shropshire
Just before I start can I just check with everyone that there is only one reason for oil in the water header tank on a 306 dturbo. Thanks.

#2
Davidsw

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Joined: 22 Dec 2016
  • Name:David sweetland
  • Location:Stokenchurch , bucks
Always best to take the head of any way so it's a given .

#3
Duroc

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Joined: 05 Jan 2004
  • Location:Diss, Norfolk

Sometimes the oil/water sandwich plate on the block, that cools the oil, corrodes. This will allow the coolant to be contaminated. It's worth a try.



#4
stumpyjag

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  • Location:Ludlow, Shropshire
Thanks for that. Any quick way of testing the oil cooler.

#5
Tom Fenton

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Joined: 12 Dec 2007
  • Location:Rotherham South Yorkshire
The only way is to pressure test it, remove both water hoses block one end off then pump it up and see if it holds pressure or not.

#6
stumpyjag

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Thanks will give it ago.

#7
stumpyjag

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Well the oil cooler passed pressure test. So apart from the correct thickness head gasket and new head bolts is there anything I should be worried about when I tackle a new head gasket. I have replaced two head gaskets on 205' gti's with no problems. Thanks.

#8
welshpug

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Joined: 18 Aug 2006
  • Name:Mei
  • Location:Bridgend
how much pressure did you give it?

#9
stumpyjag

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About 30 psi which it held and then put it underwater just to make sure, no bubbles.

#10
welshpug

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  • Name:Mei
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nowhere near enough im afraid, peak oil pressure on the xud is 5 bar, so about 60 odd.

#11
stumpyjag

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Joined: 21 Apr 2010
  • Location:Ludlow, Shropshire
Surely if it had a hole in it at the very least I would see bubbles even at low pressure.

#12
welshpug

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depends how big the hole is.