Would like to collect experiences and recommendations in this thread having to do with burping the M35B engine on the Mk II. Any ideas to share?
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Larry Brandt
S/V High Flight #2109
Pacific Northwest, PDX-based
2002 C-36 mkII SR/FK M35B
Would like to collect experiences and recommendations in this thread having to do with burping the M35B engine on the Mk II. Any ideas to share?
Larry Brandt
S/V High Flight #2109
Pacific Northwest, PDX-based
2002 C-36 mkII SR/FK M35B
Larry,
This is a very timely post as I planned to replace the coolant on my 2005 M35B next weekend but a little unsure for the first time.
Firstly, I planned to drain the coolant by removing a hose from the heater being the lowest point in the system.
Then as described in the attached post by Stu Jackson, I planned to remove the lower hose from the thermostat and fill with a funnel until coolant came out of the thermostat where the hose was removed. I've aded a photo of the set-up on my engine.
I guess the butterfly valve on top of the thermostat is an added point where air may be purged but with care if the engine is hot.
I would appreciate confirmation of this approach. There is a lot of corresppondence on this topic on the various sites and a few horror stories.
[url]http://c34.org/bbs/index.php/topic,6544.msg42843.html#msg42843[/url]
Peter Taylor Melbourne Australia. Altair #2227 2005 C36 Mk11
larry-
what exactly are you referring too when you ask about burping the MP-35B? i'm thinking about burping the diesel lines after changing fuel filters.
gordon
SlemBob #1668
1998 C-36 SR/FK M35BC
San Francisco
Please correct me if I am wrong, but I thought there was a very detailed step-by-step procedure that one of our members posted aobut a year ago.
Glenn Druhot
Carpe Diem
New Bern, NC
35* 6' 10" N / 77* 2' 30" W
2001 C36, Hull #1965
Std Rig; Wing Keel; M35B
'Burping' is the process of purging air from the closed cooling system.
Sometimes, when the cooling system of a water-cooled engine (of a boat or car, or I suppose even a P51 Mustang, which is liquid-cooled) is breached for maintenance, say to flush the anti-freeze, when the system is reassembled the water pump wil not circulate the coolant. If you test run the engine with trapped air and the water pump isn't doing its job, the engine will rapidly over temp. The reason the water pump is ineffective is because air becomes trapped in the system, and so the water pump flails away without contact with the liquid, and so doesn't circulate the coolant. The process of eliminating that trapped air is called 'burping'.
Stu provided a link to a C34 thread that is fairly good, but it's for a M25 engine. What I am asking is for members of this Forum to ante up their experiences, successes, etc on burping the M35.
Larry Brandt
S/V High Flight #2109
Pacific Northwest, PDX-based
2002 C-36 mkII SR/FK M35B
I followed Stu's advice the last time I replaced the coolant.
I filled through the cap on the manifold, then closed the cap. I then removed the small diameter coolant hose at the thermostat housing and raised it up so it was the highest level and slowly added coolant through a funnel. Air purged from the system as the liquid ran down the hose and when it was full I put the hose back on with minimal spillage.
I ran the engine to normal operating temp and verified no cooling issues under load.
Duane Ising - Past Commodore (2011-2012)
s/v Diva Di
1999 Catalina 36 Hull #1777
Std rig; wing keel, M35B, Delta (45#)
Punta Gorda, FL
http://www.sailblogs.com/member/diva-di/