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Author Topic: Head gasket change  (Read 4188 times)

Offline Len

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Re: Head gasket change
« Reply #10 on: 17 March 2014, 20:54 »
Just trying to think what chemistry would be needed to cause the ally to corrode.
I mean the water jacket has fluid in it constantly. Sorry I mean coolant, which should not cause any corrosion. And I cant for the life of me see how oil can corrode ally!
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Offline boneybradley

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Re: Head gasket change
« Reply #11 on: 17 March 2014, 21:23 »
I know these are a popular part (well they are made by most big brands for the after market) so I guess they do fail. I can only guess poor anti freeze make them corrode (the amount of people I tell and tell again to only use g12 spec red anti freeze in their mk3's is shocking!)
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Offline dan_thevdub_man

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Re: Head gasket change
« Reply #12 on: 18 March 2014, 01:29 »
Thanks everyone for the replies. This is what I'm going to do. Replace expansion tank, flush the radiator and engine (what's best way to do this and for how long should I do it for. Also the oil oiler, how do I test this and what do I look for ? Also what's best way of flushing the rad, just disconnect top and bottom hoses and flush garden hose. Then when all this is done, top up with g12 and distilled water? Am I right?
Also, if my head gasket had gone surely there would be more cream in the oil cap (non at the mo) and some on the dipstick too?
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Offline chris_d66

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Re: Head gasket change
« Reply #13 on: 18 March 2014, 18:50 »
Before you go mad and replace the head gasket find out when it was serviced did the coolant get topped up.
I have seen G11 Blue/green mixed with G12 red/pink and the results sound about the same as your experiencing.
Has your golf shown signs of over heating if not then the head gasket should be ok.
Some times the heat exchangers split but not at 106, miles you would have a lot of coolant mixed with the oil.
Do a compression check both hot and cold if you can borrow a coolant pressure tester do that aswell.
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Re: Head gasket change
« Reply #14 on: 19 March 2014, 13:37 »
Quote from: Len on 17 March 2014, 20:54
Just trying to think what chemistry would be needed to cause the ally to corrode.
I mean the water jacket has fluid in it constantly. Sorry I mean coolant, which should not cause any corrosion. And I cant for the life of me see how oil can corrode ally!

If your coolant is the wrong strength or old it can cause major damage to Aluminium very quickly.
Did you learn about Anodes and Cathodes all those years ago? Its all covered there.
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