LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Coolant reservoir leak ?'s

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Old 12-02-02, 06:51 PM
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chliansh
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Default Coolant reservoir leak ?'s

Is there any way to fix the reservoir in the first generation ls 400's instead of replacing it? Any one know what actually goes bad inside it?

Trying to save some $
Old 12-03-02, 11:17 AM
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SQ-LS
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Do you actually see the leak?
if you can maybe just silicone it up.
Old 12-03-02, 07:00 PM
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chliansh
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Nope, cant see the real source. it looks like it comes from around the area of the low coolant sensor on top.
Old 12-04-02, 12:19 PM
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mlevk
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MY 91 HAS THE SAME PROBLEM AND IT'S A HAIR LINE
CRACK AT THE OPENING OF THE SENSOR MOUNT.
WHAT I DID WAS APPLY PVC CLEANER AND SOLVENT
AND IT USUALLY STOPS IT FOR ABOUT 6 MONTHS.
I CHECK IT EVERY OIL CHANGE AND REPEAT IF REQUIRED.
THE COOLANT TANK IS $180 NEW.
Old 12-04-02, 01:15 PM
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chliansh
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mlevk
So do you remove the sensor 1st? And are you using regular plumbing supplies for pvc solvents and glue?

Thanks
Old 12-04-02, 04:09 PM
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mlevk
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Yes , the sensor comes off.
The hair line crack extends thru the
opening , it's about 3/16" long and hard to
see, but under full pressure, it shows
bubbling however slight.

I used regular PVC stuff that I used on my
darin pipes, I think it was from Home depot.
I don't put alot on but it is slightly built up.
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