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To burp or not to burp, that is the question

Discussion in 'Cherokee' started by HikerJeep, Nov 22, 2021.

  1. Nov 22, 2021 at 8:55 PM

    HikerJeep [OP] Member

    May 2, 2018
    1999 Jeep Cherokee XJ Sport 4.0L 4x4 5-spd manual (356,500 original miles) -

    Parked the rig on the up incline, flushed the heater core, and waited for all the coolant bubbles to finish their journey.

    Today, I took the rig out on the freeway, driving at about 55-62 mph, when suddenly there was a strong misfire/bucking/hiccuping for several seconds, then a return to normal. This occurred three or four times within a span of several minutes.

    Downshifted to 3rd, exited the highway, turned around, and moseyed back home at about 45-55 mph without incident.

    1. Looking online, I find conflicting information
    2. Numerous DIY flush the heater core videos all show radiators with caps
    3. Other sources say: If you have a radiator cap your system is open (not closed) and does not need to be burped.
    4. What?
    5. Is the incident I experienced the result of air remaining in the cooling system?
    6. If so, what’s the remedy? (Not at all interested in trashing the motor!)

    Any info/assistance much appreciated.
    Thank you.
  2. Nov 23, 2021 at 6:05 AM

    aggrex Well-Known Member

    Sep 12, 2016
    Backcountry '16
    Not sure what caused your misfire, bucking but clearing air pockets out of the system is the proper procedure after servicing the cooling system.
    JKBob 25 and Bob like this.
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