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Pink Crust on Coolant Reservoir

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Old 09-12-17, 09:14 AM
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DixieLex
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Default Pink Crust on Coolant Reservoir

Water Pump going out?
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Old 09-12-17, 10:15 AM
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andper10
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If it is near the black plastic cap you can order a replacement cap and that should stop the issue especially if the existing cap is easy to remove indicating the inner o ring seal is worn out.
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Old 09-12-17, 11:36 AM
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Gville350
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Normal...unfortunately. Mine has had the pink crust since day 1 (April 2011).
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Old 09-12-17, 03:40 PM
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Mine gets it and I just wash it off.
Actually a few weeks ago I removed the cap, cleaned it all up and reversed the washer (tight).
Doesn't seem to be seeping..yet.
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Old 09-13-17, 01:31 PM
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Just means when the coolant heats up, you have overflow and when it dries up, turns into pinkish crud. Nothing to worry about, if at all, it may indicate you have too much coolant. On a cold car, the coolant level should be on the top line.
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Old 09-13-17, 02:12 PM
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Gville350
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I keep my coolant overflow tank at half full, and it still does it. Even tried letting the level get to the low level indicator once...still did it.
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Old 09-14-17, 07:28 AM
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mandyfig
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Mine's the same. Some clean up required periodically. Also keep the Toyota Coolant handy for topping off.
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Old 09-14-17, 07:56 AM
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I guess it's something Lexus never bothered revising. Just an annoyance really. The original one that came with my car did it, and the one I bought last year does it too (believe I bought the whole assembly, new overflow tank and cap/tube). Doesn't seem to have any measurable coolant loss, it's just barely below the full line on my tank at the moment (which I believe I had it exactly at full when I replaced the water pump earlier back in February)
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Old 09-14-17, 08:56 PM
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Originally Posted by Gville350 View Post
Normal...unfortunately. Mine has had the pink crust since day 1 (April 2011).
yup, just rinse it off.
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Old 09-14-17, 09:38 PM
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Since I tightened the "seal" mine has stayed clean.
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