Dear jd620,

Hope you're well. You're welcome! I'd saturate the broken fitting with lots of penetrating oil (e.g., Kroil, PB-Blaster, etc.) before trying to remove it.

If you have to remove the nut - which I think screws into the block - I'd: (a) use a wire or stiff plastic brush to clean the block threads and (b) coat the replacement nut's threads with a good quality anti-seize.

Nickel-based anti-seizes aren't cheap, but they'll take temperatures above 2,000⁰F. Such a temperature won't occur in an engine cooling system. But I'd guess a nickel-based anti-seize won't react with cast iron or brass and so is unlikely to deteriorate with time.

Hope this helps.

Yours faithfully,

Spook

Dear Amarin,

Hope you're well. Part #966723 - a "crane" in the Volvo lexicon - should be available from a North American Volvo dealer. The cost should be $9-10.

It might be wise also to get #3531383 - a "nut" - which screws into the block, according to the Volvo VADIS diagram. The "nut" should cost about $5 at a North American Volvo dealer.

Hope this helps.

Yours faithfully,

Spook