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Vanishing coolant! 200 1990

posted by  Art Benstein on  Tue Jun 9 18:52 CST 2020
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last visit: Fri Oct 17 20:10 CST 2014
[RELATED]

Chris, by saying "around the back of the block" you are referring to the heater return hose which extends to the steel pipe leading to the coolant pump. The hotter S-shaped heater feed hose between the head and the firewall is even more prone to fail.

I advise you replace both and use genuine Volvo hoses. Some of the aftermarket replacements are not formed correctly. If you remove the air plumbing for the intake, booster, and PCV system, you can get to these hose clamps. Take care when cutting the hoses loose not to score the fittings.

Also check the booster hose near its connection with the intake manifold as it tends to soften with blow-by and can result in sudden loss of brake assist. All these hoses, and the radiator hoses are stressed by worn or oil-soaked motor mounts. In the end analysis, oil leaks ruin coolant hoses.
--
Art Benstein near Baltimore






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