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antoha · 24-07-2015, 11:55

My westerbeke has cruising temp of 180: that's the middle of the gauge of the admiral panel. 140 sounds low...

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antoha · 24-07-2015, 12:01

No no - above 190 is a problem. I just noticed you said 140 F seems hot, and I thought that strange.

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soyuz · 24-07-2015, 12:11

Sorry Anthony that reply was for fritz, i am not sure the gauge is working properly but as I said stayed at 140 f for years now it's climbing near 220 f

Cap Erict3 · 24-07-2015, 12:23

Quote:

Originally Posted by soyuz

I did put the temp sensor it hot water was reading 150 so i guess it's working. Did try without the thermostat still goes over 140,

Hot water isn't a good test. Boiling fresh water @ sea level will be 212 and a real test of calibration.

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Cap Erict3 · 24-07-2015, 12:29

Quote:

Originally Posted by soyuz

Sorry Anthony that reply was for fritz, i am not sure the gauge is working properly but as I said stayed at 140 f for years now it's climbing near 220 f

Do you have good water flow from ur exhaust? If not check strainer basket @ thru hull, raw water pump belt & impeller and inspect inside heat exchange.

If yes, u have poor cooling water flow in ur engine.

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Looking for another pretty place to work on the boat.

antoha · 24-07-2015, 12:33

An IR thermometer is $35 on Amazon. I guess the question is: after engine warms up (by independent temp measurement), does the thermostat open the cooling circuit (which you can check by measuring the temp in that circuit)? If thermostat gets stuck it won't open; if it's installed incorrectly it will also do the wrong thing. Thermostats are not too expensive I imagine, and easy to replace?

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soyuz · 24-07-2015, 12:42

Cap eric, yes I have a good flow I did look at everyting, I think I may have to drain the coolant and look for blockage not normal that the hoses stay cold.

Antoha, i know a ir sensor would be the best but it would take me 3 hours easy to get one since I am on anchor here.

soyuz · 24-07-2015, 12:47

Btw antoha I did try the engine without the thermostat and it's the same result

antoha · 24-07-2015, 14:42

soyuz, being on the hook and with no car has limitations, i can relate.

but: from what i understand, in southwest harbor they have: the hinkley yard (not suggesting you hire them to do the work, that'll be expensive - but maybe you can ask some of the guys there if they could test your thermostat for functionality, maybe borrow a IR thermometer, i don't know); westmarine; hamilton marine. the guys at hamilton marine are great - and can order parts for you to arrive next day if they don't have them in stock (it's a small store). and i'm sure you can get a cup of boiling water and some ice from places on land so you can test/calibrate your temperature gauge.

just a thought...

soyuz · 25-07-2015, 16:36

The problem is fixed, not too sure how I did it . Disconnected all the hose back to front bleed it put new Prestone in now it's working fine. Thanks for all the help here.

Happy sailing. Soyuz.

Nicholson58 · 25-07-2015, 17:15

Quote:

Originally Posted by soyuz

Thanks for the replies guys. I did put the temp sensor it hot water was reading 150 so i guess it's working. Did try without the thermostat still goes over 140, I did run the engine for 24 hours few years back never went above 140 even last year after several hours of motor sailing never went above that. So i am assuming anything above 140 something is wrong. The coolant pump looks fine put it back on and there is no leak anymore. Not sure how much coolant is in there since every time I disconnect i am losing a bunch but i top it off every time.Now what seems odd is every hose that connect to the heat exchanger is cold the whole area stay cold even if the manifold and valve cover are hot. Been talking to my neighbor and he thinks there is something wrong with coolant flow maybe a blockage are something like that, not sure what to do next

Just a silly thought but my Westerbeke is a pain to install the impeller. It may take several tries before I get the raw water impeller on WITH the woodruff key properly in place - BAD DESIGN !!! If this happens the shaft turns but the impeller does not.

Other usual culprits:
Heat exchanger raw water side blocked by marine growth.
Heat exchanger glycol side tubes blocked. I have bronze brushes for rodding out.
Thermostat faulty
Raw water strainer blocked
Raw water intake port blocked.
Exhaust mixing Elbow blocked.
Exhaust mixing muffler blocked.
Several of the above may show as reduced water flow at the exhaust port exit. Check the water out in the exhaust. If there is none, you have isolated the problem.