Hey, Spook. hope you are also staying well.
Way back, and I'm talking 1980s, with a red block Volvo engine I used a bottle jack under an aftermarket pump (likely either Hepu or GMB, I'm not sure) to compress the mushroom gasket up under the head flange. I must have gotten slightly carried away with the jack as the next day I noticed it was leaking and on inspection I discovered I'd managed to crack the pump casting. It was rather embarrassing to go back to my indie parts supplier and this time ask them to order me in a genuine Volvo pump. Since then I only use a pry bar under the pump braced on something like the power steering pulley. I must have done ten water pumps since then and always found that's more than enough force to adequately compress the gasket.
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now
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