Karlecc Posted May 20, 2019 Share Posted May 20, 2019 Can anyone advise me on my coolant backing up in to the expansion tank then causing it to overheat seems to be when I've been revving hard tia Quote Link to comment Share on other sites More sharing options...
DaveRAC Posted May 21, 2019 Share Posted May 21, 2019 Could be running too much pressure in it and really and truly the only thing that can cause that is compression leak from head gasket Any modifications to vehicle at all and what model do you have ? Quote Link to comment Share on other sites More sharing options...
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