Is a Vauxhall Astra diesel head gasket replacement a cheap DIY job?

I have a Vauxhall Astra estate diesel turbo with oil leaking into the water. We've been told it probably needs a new head gasket. How much will this cost to replace DIY, or would it be cheaper to fit a secondhand engine?
That's impossible to answer by email. There's no way of knowing the extent of the damage.
Answered by Honest John on

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