Coolant buzzer again!

[RemarkLima]

OK, how quickly should I see bubbles? Sadly my neighbours are old so great for security but they do get the ar$e when it\'s been left to idle for too long!

So only ran it for 3 minutes or so, but saw no bubbles at all with my torch shining in there too just to make 100% sure... Do I need to let it get right up to temp? I also checked for pinched hoses but can\'t see anything and no obvious signs of a leak :/

Except when it spews from that side, but I\'m sure that\'s because I\'ve overfilled but keeping on topping up... I hope!

[stylus350]

Hi all, bit of a long one, but I\'ll try and describe the situation as much as possible!

Very occassionally I get the coolant buzzer go off. Now it\'s not done it for ages but I went to Silverstone a couple of weeks back and got there fine, had a day out ragging over peoples cars around! Then end of the day I start up the RX and the coolant buzzer goes off but only for 30 seconds if that! Then fine all the way home.

Since then it\'s done it pretty much 90% of the time after I first start up and then goes... I have no trouble starting at all (always on both rotors now, I think that was bad plugs!), hot or cold and there\'s no white coolant smoke out of the exhaust when it starts, I\'m yet to do the ol champagne test but don\'t feel it\'s water seals (*tocuh wood*) as the oil is mayo free and the coolant is still clear and clean (only changed it start of the year).

There\'s no obvious signs of a leak anywhere, and while it\'s hard to tell the level on the expansion bottle, that always seems to have enough in!

So any ideas? It\'s got a standard plastic AST and a .9 bar cap on that with the usual solid cap on the filler neck. The rubber seals look good on both caps, but I was thniking of replacing the AST (keep it plastic for now), and both caps.

Anything it could be or that I can try?

Cheers,
Mark

Mine did the buzzer on for 30 secs thing for a while after the water system was drained and re filled. Left the water filler cap off overnight a few times, let her warm up a little before putting it back on in the morning and \'burped\' the system a few times. After doing this for a few days it stopped so I am positive it was an air block.

[RemarkLima]

Good to know, I\'ll try that as well, but I changed the coolant a while back now... I guess it could have been getting there more and more over time?