Chrishoughton1989 Posted September 1, 2013 Share Posted September 1, 2013 Hi my exspansion tank overflowed today after driving hard for a long period. It was at the full mark to start. I'm hoping there was to much water in to start is this possible causing it to overflow. Should I drop it down to min mark ? Has anyone else had this ? Thanks. Quote Link to post Share on other sites
Chrishoughton1989 Posted September 1, 2013 Author Share Posted September 1, 2013 Anyone ? Does water being drawn back from expansion tank make a sort of glugging noise and u can feel it if you touch the expansion tank? Or is that water boiling ? Thanks Quote Link to post Share on other sites
TurboTobz Posted September 1, 2013 Share Posted September 1, 2013 Could be an air lock, too much water possibly, headgasket, cracked head.Check the usuals, pressurising coolant system, gunk under oil cap, petrol smell in coolant etc etc Quote Link to post Share on other sites
Chrishoughton1989 Posted September 1, 2013 Author Share Posted September 1, 2013 None of the above ? Can you hear the water like gulping back into the rad after you have switched engine off ? Quote Link to post Share on other sites
TurboTobz Posted September 1, 2013 Share Posted September 1, 2013 Blockage? Sounds like some form of air lock or some pressurising although obviously you say not, sounds like something's pressurising it out of the rad and once engines off its allowing it back in. Temperature staying the same? Quote Link to post Share on other sites
Chrishoughton1989 Posted September 1, 2013 Author Share Posted September 1, 2013 Is that not normal. After hard drive it pushes it out than draws it back in ? Just can you hear it drawing back ? Temp normal. Quote Link to post Share on other sites
TurboTobz Posted September 2, 2013 Share Posted September 2, 2013 Well as things heat up then it will push out some, and then draw it back in m. I was under the impression it was rather a lot? Quote Link to post Share on other sites
LukeH Posted September 2, 2013 Share Posted September 2, 2013 I have the same problem. Overflows then once cold is back down to min, so I have to top it back up. Only after hard driving.Just had new head inc gasket, thermo ect. Running civic rad, could it be that the cap is simply not holding the pressure? Quote Link to post Share on other sites
Bluebear Posted September 2, 2013 Share Posted September 2, 2013 I'm having this exact problem, got myself a 1.3 bar radcap on the way and hopefully that'll solve it. Any airlocks should have been well gone by now, and I don't think the rad itself is cracked. Quote Link to post Share on other sites
TurboTobz Posted September 2, 2013 Share Posted September 2, 2013 Ah yes, I did forget the rad cap Quote Link to post Share on other sites
Chrishoughton1989 Posted September 3, 2013 Author Share Posted September 3, 2013 I'm running civic rad 1.3 cap still the same. Head gasket done last month. New civic rad. New cap. Tested thermo. Glad it's not just me lol Quote Link to post Share on other sites
Mad Mike EP82 Posted September 3, 2013 Share Posted September 3, 2013 I've had same problem will let u know when the head comes off. Quote Link to post Share on other sites
The Toffinator Posted September 3, 2013 Share Posted September 3, 2013 I was having this problem before my engine did this Not too scare anyone lol.Never got to the bottom off it but im sure it only started doing it after i fitted a civic rad etc.... Quote Link to post Share on other sites
Chesh Posted September 4, 2013 Share Posted September 4, 2013 (edited) Change your rad cap if it does it then just flush the system, When you say it does it on hard boost it could be the head lifting on boost, Who did the headgasket for you, try new theromstat that might be sticking Edited September 4, 2013 by Chesh Quote Link to post Share on other sites
LukeH Posted September 4, 2013 Share Posted September 4, 2013 (edited) Im guna try a rad cap, seems logical. Do starlets one fit the civic rad? Let us know how yours does nick (bluebear)Chesh: i did mine. New arp bolts. Got someone to double check tourque so pretty sure its not that. Only running 0.8 bar on ct9TOffinator. Thanks for filling us full of confidence lol Edited September 4, 2013 by LukeH Quote Link to post Share on other sites
Chrishoughton1989 Posted September 4, 2013 Author Share Posted September 4, 2013 I dropped the water from max to min in the expansion tank when cold and it's fine now was obviously over filled. Quote Link to post Share on other sites
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