SailNet Community - View Single Post - Coolant circulation issue - is the water pump working?
View Single Post
post #8 of Old 02-13-2013 Thread Starter
Dufour 27 Newb
Join Date: Dec 2010
Location: Malta
Posts: 108
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 5
Re: Coolant circulation issue - is the water pump working?

thanks for your feedback which is appreciated!

first of all the background and to answer some of the questions ... I empty the coolant once a year typically around April which is the time I also do an annual service. I check the coolant before every outing and most times would need to top up 1/2 glass so around 5 cl to overflow it as I have small leak around the o-ring of the heat exchanger!

So last year I removed the coolant (dark green dye) via the pipe marked in the pic above and added Shell 50/50 blue coolant - this year I did the same only to find lots of green colour coolant which subsequently triggered the post!

The engine has only over heated once - it was after a semi longish journey (4 hours at around 2500-3000 revs) and I found it was low on coolant. I removed the heat exchanger because of the leak and also to make sure it is in good shape since I was aware of the blockage on the drain plus it had never been serviced in 7 years (500hours)

After reading the posts above I have now learnt that the engine must be hot for the thermostat to kick in before the coolant is circulated *blush* I didnt know that! So it could very well be why the green coolant has not really mixed with the blue one but does not really hold as last season I did many long trips plus the overheating experience!

So as a next step I am going to drain via this syphon pump that I have ordered which has acquarium type pipe which should help me get out most of the coolant and sort out the leak!

I am seriosuly considering installing a temp guage since all I have is an alarm. Would appreciate any tips on this now?!

thanks again.
jaybeegee is offline  
Quote Share with Facebook
For the best viewing experience please update your browser to Google Chrome