liamtg60 10 Posted June 24, 2011 (edited) Im about to smash my car up with a hammer!! Ive just did a coolant change because it was badly needed only to find out my rad was fookd. so replaced rad today in my 1.8 16v. Now wen iv gone to top tank up and and let run on fast idle Im obviously got sum horrible air locks trapped in system. Will sumone pls help me im at my wits end i cant shift them. The car started warming up and heaters wher hot at one point fan kicked in and all seemd normal then 5mins later everything went cold on heaters and coolant started bubbling from tank car began to overheat what am i doing wrong any help wud b appreciated ta Edited June 24, 2011 by liamtg60 Quote Share this post Link to post Share on other sites
Jim Bowen 1 Posted June 24, 2011 when i've done mine in the past i was told to run the engine from cold without the coolant cap on the header tank, and also put heaters on inside the car, then watch the header tank and replace the cap as it starts to boil over Quote Share this post Link to post Share on other sites
Jon_vr6 1 Posted June 24, 2011 As long as you fill up from the top radiator hose you shouldn't have a problem with air locks Quote Share this post Link to post Share on other sites
liamtg60 10 Posted June 24, 2011 As long as you fill up from the top radiator hose you shouldn't have a problem with air locks Yeh I ended up trying that and it seems to of worked. heaters are hottish and fans kickin in now. job done I think going to give it another once over tomorrow before I carry on as usual, just to be sure. Quote Share this post Link to post Share on other sites
VW_OwneR_85 2 Posted June 24, 2011 is it possible that the water pump is failing? i.e not clearing the airlocks like it would do? pressure is what clears airlocks, garden hose in one end and an open connection at the other end ,blast mains water through it,thats what we did on gravity heating systems that got airlocked,im guessing it would be ok to use this method on a cars system? Quote Share this post Link to post Share on other sites
liamtg60 10 Posted June 24, 2011 is it possible that the water pump is failing? i.e not clearing the airlocks like it would do? pressure is what clears airlocks, garden hose in one end and an open connection at the other end ,blast mains water through it,thats what we did on gravity heating systems that got airlocked,im guessing it would be ok to use this method on a cars system? ill have to try that one day lol it'd prob work straight away. I did it the more conventional way at fast idle for bout half hr occasionally topin up wher necessary Quote Share this post Link to post Share on other sites
