porous/gasket

[Count Vaux Alot]

ahhh the good ole sales tactic of "it wont be a bodge" to try and justify it.

Is the guarantee only valid if they refit the head? If I were an engineering firm I wouldnt guarantee a repair like that unless I had refitted the head too.... too many variables in rebuilding the engine to just blame the repair job


joffs thread on mig
http://www.migweb.co.uk/forums/engin...ification.html

Sorry for trying to offer a solution to a problem do it how you want it won't make any difference to me if it goes wrong, i'm sure your diy method will be fine.

[Stuart]

not my DIY method

but certainly £95 cheaper than yours.... esp as there isnt any need for drilling

[Philsutton]

The nature of where the GM head fails means it will always blow oil into the water system. If you have oil in the water you can pretty much guarantee its a cracked (porus) head. Ive never seen a blown headgasket do the same thing if it goes across and oil/water gallery, invariably it'll gloop up the oil, or do both, but not just gloop the water.

The scenario you mention about the core plug doesnt add up as theres no water in the oil as far as we know

Ive seen head gaskets go both ways, you can also do the head gasket without mixing oil an water. So many different ways they can fail, however if the head cracks it will go into the header tank as you say, but the gasket can also do that as well.

99% of the time it will be the head an not the core plug, these engines dont usually core plugs its very rare they do.

[Lee]

Ive seen head gaskets go both ways, you can also do the head gasket without mixing oil an water. So many different ways they can fail, however if the head cracks it will go into the header tank as you say, but the gasket can also do that as well.

99% of the time it will be the head an not the core plug, these engines dont usually core plugs its very rare they do.

You'd have much more experience seeing stuff like that than me But id still be surprised as the water is under a load more pressure coming up the block so it would have thought it would normally force its way into the oil at this point, rather than vice versa.

Agreed its not a foolproof diagnosis though

[Count Vaux Alot]

not my DIY method

but certainly £95 cheaper than yours.... esp as there isnt any need for drilling

Does it work?

[Stuart]

have you even looked at the link?

[Count Vaux Alot]

Sorry i thought you had tried it....