Coolant system issue?
I'm having an issue with my 91 civic dx 1.5L.
My Dad just had the head resurfaced, put a new head gasket, radiator, timing belt, water pump, thermostat, radiator cap. All was good after the above work was done until about 1 & 1/2 months later.=-then it started transferring coolant between the overflow reservoir and the rad and back again. After driving it, the overflow is about an inch or so over the max fill line, after sitting for a while the radiator seems to suck most of the fluid back until the reservoir is barely over the fill line. This happens everytime I drive it, now. It isn't overheating, per the temp gauge, anyway. I also can't see any antifreeze on the ground or anywhere under the hood, though. In 2 months since the job was done now, the rad only needed to be topped off once, about a 1/2 cup.
Anyone have any ideas what to have checked or do next? What could be the cause? I appreciate any help.
Last edited by redcivicforever; 09-16-2014 at 08:42 AM.