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Jeep Wrangler JK
JK General Discussion
Heat blows hot on passenger's side but cold on driver's side
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<blockquote data-quote="MacGuyver" data-source="post: 437256" data-attributes="member: 18877"><p>Just flush it with a garden hose. Both directions for a few minutes. Unless it is leaking there is no reason to replace it.</p><p></p><p>edit: I just re-read your OP and I'm curious that you have had to replace the core twice in the last few years. This is not normal and there is something else going on.</p><p></p><p>A couple things. </p><ol> <li data-xf-list-type="ol">Do a flush of the core but make sure you catch what comes out, checking for sand. Chrysler does have the occasional engine that comes out of the factory with casting sand still in some of the ports, though I would think you would have had bigger problems long before 211K . </li> </ol><p></p><p style="margin-left: 20px">2. What coolant are you using? What coolant is the dealer using or whoever replaced the last couple heater cores? The old stuff and the new stuff mixed make jelly. I only ever put universal in my engine to avoid this issue. My mech does the same thing. </p><p></p><p style="margin-left: 20px">3.When is the last time there was a complete super flush of the entire coolant system? Small particles that will pass right through the primary radiator can block-up the heater core. Chrisfix has a how to on this on youtube. At that mileage, who knows what is dancing around in the system</p></blockquote><p></p>
[QUOTE="MacGuyver, post: 437256, member: 18877"] Just flush it with a garden hose. Both directions for a few minutes. Unless it is leaking there is no reason to replace it. edit: I just re-read your OP and I'm curious that you have had to replace the core twice in the last few years. This is not normal and there is something else going on. A couple things. [LIST=1] [*]Do a flush of the core but make sure you catch what comes out, checking for sand. Chrysler does have the occasional engine that comes out of the factory with casting sand still in some of the ports, though I would think you would have had bigger problems long before 211K . [/LIST] [INDENT]2. What coolant are you using? What coolant is the dealer using or whoever replaced the last couple heater cores? The old stuff and the new stuff mixed make jelly. I only ever put universal in my engine to avoid this issue. My mech does the same thing. [/INDENT] [INDENT]3.When is the last time there was a complete super flush of the entire coolant system? Small particles that will pass right through the primary radiator can block-up the heater core. Chrisfix has a how to on this on youtube. At that mileage, who knows what is dancing around in the system[/INDENT] [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
Heat blows hot on passenger's side but cold on driver's side
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