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The BMW Range
5 Series
E34
Bleeding cooling system.
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<blockquote data-quote="pussy" data-source="post: 281011" data-attributes="member: 60"><p>is it a 12v or a 24v ?</p><p></p><p>sounds like a 12v engine , since you mentioned a bleed screw on the thermostat housing.12v engines are harder to bleed.</p><p></p><p>you open the cap when you feel up the radiator, the bleed screw at the radiator and thermostat housing also needs to be open.. when water come out from the thermostat side, close it, and watch the water bleeds from the radiator side. keep putting water in till you see only water comes out like a stream.close up the bleed screw even the cap.</p><p>start the car, idle the engine for a while, till you feel the thermostat opens by feeling the top hose to the radiator. then gently open the thermostat bleed screw , make sure little, till u hear a hiss-hiss sound.. that means air is being expelled.</p><p>when the hissing is gone, water will gush out, close the bleed screw.</p><p>open the radiator bleed screw, repeat the process as the thermostat . then gently open the cap, feel up the water in the reservoir tank.</p><p></p><p>then idle the car for a while with the hood down, observe the reading is fine. finally take for a test drive.</p><p></p><p>hopefully this helps.</p></blockquote><p></p>
[QUOTE="pussy, post: 281011, member: 60"] is it a 12v or a 24v ? sounds like a 12v engine , since you mentioned a bleed screw on the thermostat housing.12v engines are harder to bleed. you open the cap when you feel up the radiator, the bleed screw at the radiator and thermostat housing also needs to be open.. when water come out from the thermostat side, close it, and watch the water bleeds from the radiator side. keep putting water in till you see only water comes out like a stream.close up the bleed screw even the cap. start the car, idle the engine for a while, till you feel the thermostat opens by feeling the top hose to the radiator. then gently open the thermostat bleed screw , make sure little, till u hear a hiss-hiss sound.. that means air is being expelled. when the hissing is gone, water will gush out, close the bleed screw. open the radiator bleed screw, repeat the process as the thermostat . then gently open the cap, feel up the water in the reservoir tank. then idle the car for a while with the hood down, observe the reading is fine. finally take for a test drive. hopefully this helps. [/QUOTE]
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The BMW Range
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Bleeding cooling system.
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