Bukh 24 water temperature indication hot and cycling.
Jun 29, 2018 20:04:40 GMT
Post by Brian & Glenda on Jun 29, 2018 20:04:40 GMT
For the benefit of future readers here is a copy of the link mentioned above, and below are instruction regarding how to post a link:
sadlerandstarlight.co.uk/forums/topic/boiling-bukh/
Yes, that article makes interesting reading ... but as in the linked article ... it seems that what is missing in many posts and requests for advice regarding cooling issues; is a statement regarding the type of cooling used on the engine under discussion (raw-water cooled, keel cooled, or fresh water cooled); and often the make and model of the engine is missing in the discussion! This is important info if one is to troubleshoot overheating.
I believe that my DV36 does not have a 'gas poker' as referenced in the linked article, while it seems that other BUKHS do. I don't know if a Bukh 24 such as Jonathon's, has a poker or not.
My DV36 engine ran cooler than it should ... about 130 degrees F with a 180 degree F thermostat (180 F = 82 C) so I began looking into the cooling systems of DV36s. I understand from my reading that the three different cooling systems of a BUKH DV36 use three different thermostats and three different plumbing configurations. I learned that the 50 degree C thermostat for a raw water cooled engine fits into an opening in the water cooled exhaust manifold, while the 80 degree C thermostats for the freshwater cooled BUKHs fit into the BUKH reservoir/heat exchangers. I also learned that while, the reservoir tank for a keel cooled DV36 is the same in appearance as the reservoir and heat exchanger for a fresh water cooled DV36, they are not the same internally, and the cooling systems operate quite differently.
My DV36 appears to have been originally raw water cooled, but at some time this engine was converted to fresh water cooling using a non-BUKH heat exchanger. If there ever was one, it appears that the water bypass system for my DV36 was removed at that time. None of the 80 degree C BUKH thermostats, will fit into the opening in the water cooled exhaust manifold; so no BUKH thermostat is available for my configuration. My cooling system now uses a $14.85 Cdn 80 degree C automotive thermostat. This proved to be much cheaper than the $259.99 Cdn that the Canadian distrubutor of BUKH parts charged me for the BUKH 80 degree C fresh water cooled thermostat (that I had to return), but as the earlier article I posted says, auto thermostats are not the same as marine thermostats, and my cooling system has apparently been altered to eliminate the bypass system.) The engine has run very well, although cooler than it should for the four years I've now owned the boat. To see if it made any difference in operating temperature I thought I'd change the thermostat and that caused me to do this research. My engine now seems to be working at the right temperature, although I haven't yet taken it out for a good run to ensure it doesn't overheat.
I'm keeping my fingers crossed now, and my wrenches close at hand.
For the benefit of any who want to know, I'll offer the following advice regarding how to paste a link:
1. Open both a 'quick reply' in this forum, and the website who's address (aka URL) you wish to paste.
2. Either hit CTRL and C together, or Right mouse click on the address of the website to be pasted and choose COPY from the drop-down menu that appears.
3. Click on the tab for this forum and left mouse click at the location you want the link to appear in your quick reply.
4. Either hit CTRL and V together, or Right mouse click at that point and choose PASTE from the drop-down menu that appears.
(CTRL C is a keyboard shortcut for COPY, and CTRL V is a keyboard shortcut for PASTE.)
Voila ... all done except to add any additional text you may want in your quick reply.
Regards to all,
Brian.