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Jeep Wrangler JK
JK General Discussion
Overheating at highway speeds
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<blockquote data-quote="kevinhomuth" data-source="post: 459509" data-attributes="member: 25255"><p>Yes I did, I have already replaced cooling fan even though I tested it in a few ways and couldn’t find an issue. I have a laser that measures rpm and I was able to witness the rpm changes as the temp raised. I have stickers that stick to a blade and I can shoot the laser from underneath. I blocked off airflow to radiator with cardboard and was able to monitor the fan continue to ramp up. I don’t remember what rpm’s I was getting because when I went online after the test I could not find any info about rpm ranges that were normal at various temps so I just went and bought the Dorman 621-601 which should be equal to or better than OEM from what I have read and no change. Fan seems to come on at about 221-223 sensor is knew as well.</p></blockquote><p></p>
[QUOTE="kevinhomuth, post: 459509, member: 25255"] Yes I did, I have already replaced cooling fan even though I tested it in a few ways and couldn’t find an issue. I have a laser that measures rpm and I was able to witness the rpm changes as the temp raised. I have stickers that stick to a blade and I can shoot the laser from underneath. I blocked off airflow to radiator with cardboard and was able to monitor the fan continue to ramp up. I don’t remember what rpm’s I was getting because when I went online after the test I could not find any info about rpm ranges that were normal at various temps so I just went and bought the Dorman 621-601 which should be equal to or better than OEM from what I have read and no change. Fan seems to come on at about 221-223 sensor is knew as well. [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
Overheating at highway speeds
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