Question about 1991 Lexus LS 400

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Heater core how to replace and install heater core for a lexus ls 400

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  • sundragray20 Feb 11, 2010

    sundragray2006@yahoo.com

  • mopardurango
    mopardurango Mar 07, 2012

    Hey bro is there any way you can send me how to replace heater core on a ls 400. Mine is a 91 also and the dealer wants like 350 for the book to tell me how to do it. My email is mopardurango916@yahoo.com. I would really appreciateit

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  • Master
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Need email address so can send you directions with images to replace heater core

Posted on Feb 07, 2010

  • Brian Miller Jun 08, 2011

    Could I possibly get the same directions with images to replace the heater core on my 1991 LS400? My email is: pdqfiero@yahoo.com

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SOURCE: 1990 Lexus ls 400 transmission

yes, no problem

Posted on Apr 13, 2009

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Lexus heater blows cold


You could have a blocked heater core. Check for two heater hoses running into the firewall in the back of your engine. They should be together and about 5/8" in diaameter. If one is hot and the other is cooler then your heater core is blocked. Unhook both hoses and use a garden hose to back flush. Be sure to catch the coolant and dispose of it properly.

Jan 27, 2009 | 1992 Lexus Ls 400

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