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Engine Block Coolant Draincock

Old Sep 16, 2006 | 12:45 PM
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Question Engine Block Coolant Draincock

I want to change coolant in 1993 Lexux LS400. Engine block coolant draincocks probably have not been opened in many years, I'm afraid they will snap/strip if I apply force. Looks like brass plug screws into fitting which screws into engine block. My plan is to order replacement draincock so I can replace if they break. Looks like pretty clear shot to drill out and re-tap if doomsday scenario happens. Has anyone had experience with them ? Do they usually open ? Has anyone had them break ? Thanks - Herm
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Old Sep 16, 2006 | 01:03 PM
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Ive never has any break on me... i just soak is down in WD40 or similar a little bit before i try to break em loose.
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Old Sep 16, 2006 | 07:54 PM
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Use a six point or sided 10mm socket, rather than a twelve point. The six point allows for more torque without rounding off, as a twelve point might.

I torqued mine to 9 Ft Lbs after draining.

Last edited by Tammy; Sep 16, 2006 at 08:01 PM.
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Old Sep 17, 2006 | 10:14 AM
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Thanks for the suggestions/comments. Did you have to hold the fitting in the engine block when you unscrewed the brass plug from it ? I was thinking of trying a six point crow foot flare wrench (if I could find one).
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Old Sep 17, 2006 | 12:13 PM
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No, just turned the brass valve head and it broke free. Didn't have to touch the valve itself.
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