dai Posted August 11, 2002 Share Posted August 11, 2002 Please can I have some advice re the brown discolouration in my expansion tank? Engine 2.0 V x. Flushed coolant but brown discolouration has returned No mayonnaise around catch tank or filler cap Do I need to change the head gasket? Do I need to have the head checked for porosity? Who could check the fluid for combustion products I live close to Stafford?Would it be safe to use the ostrich method and just ignore it everything seems to be running fine? Any advice gratefully received Cheers Dai Link to comment Share on other sites More sharing options...
Blatman Posted August 11, 2002 Share Posted August 11, 2002 Before you go worrying about head porosity, I have this, from the WSCC boardroom........ There is an oil gallery plug which protrudes into the cooling sytem by the water pump (you have to remove the pump to view it). Some people wrongly assume the head is porous if they have already checked / replaced the head gasket. It is often the case that this simple plug is leaking oil into the coolant. It is easily rectified by removing it and fitting a new one that is already coated in special sealant. It should be fairly obvious if it is leaking as when you view it there should be signs of oil emulsion in this area. Link to comment Share on other sites More sharing options...
ECR Posted August 12, 2002 Share Posted August 12, 2002 I can check the fluid for combustion products. Give me a call Ex Chairman Roger Link to comment Share on other sites More sharing options...
stevefoster Posted August 12, 2002 Share Posted August 12, 2002 A brown discolouration in the headertank is quite normal. All VX's with iron blocks and ali heads do that. The 16V'ers and the 8V'ers... Steve My racing pics here Hants (North) and Berkshire area club site here Edited by - stevefoster on 12 Aug 2002 16:38:05 Link to comment Share on other sites More sharing options...
Alex Wong1697456877 Posted August 12, 2002 Share Posted August 12, 2002 Most likely source is you radiator - mine was always brown and 'orrible till I swapped it for an Ali radiator. You know you've always wanted one!! Regards to the family and hopefully see you soon. Link to comment Share on other sites More sharing options...
dai Posted August 12, 2002 Author Share Posted August 12, 2002 Thanks very much for the advice everyone, fortunately following a further flush the brown colour has not returned I shall assume there are no problems and that it was a variant of normal. Alex I am now the proud owner of an alloy rad but it was courtesy of my enforced upgrade, thanks for your kind offer Roger see you soon Dai Link to comment Share on other sites More sharing options...
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