Place a short tube on the other side of the bottle cap to extend down into the fluid to force the gases to draw through the fluid. Place one vacuum tube on your Mityvac or on a source of engine vacuum to pull gases through the bottle. Fill the bottle part way with Lisle testing fluid 75630 for gasoline engines. Mityvac has a fluid transfer bottle in their vacuum pump kits (pictured) or you can make one using a small jar and a lid with hoses through it. If you suspect a head gasket leak resulting in combustion gases entering your coolant, you can test for this using special test fluid which turns from blue to yellow in the presence of exhaust gases. Since the brake reservoir has the same type orifice, it can also be used to pressure bleed the clutch and brakes. I connect a $5.00 bicycle pump (with built in pressure gauge) to the cap and presto. When I need to use it, I take the gasket out of the coolant reservoir cap and use it in my pressure cap. If you don't have such a cap, then an old coolant reservoir cap should work even better. Then I bought $1.00 worth of tank valves and screwed one into it. Here's what I've rigged up for both pressure testing the cooling system and bleeding the clutch and brakes: I found an old bottle cap that has the same threads as the coolant reservoir.
See the following links for a variety of special-purpose tools for Volvo cars: The thumbnail images below link to larger images to save download time: click the image to open the link.
Pre-Pump and Fuel Tank Sending Unit Removal ToolsĮxternal Temperature Indicator Lamp Replacement Tool VOC Home | FAQ Home Volvo Special Tool Designs
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