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Old 07-18-2012, 07:29 PM   #34
BruceK
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City: Sydney
Vessel Name: Sojourn
Vessel Model: Integrity 386
Join Date: Oct 2011
Posts: 13,333
Quote:
Originally Posted by FF View Post

Since there is almost no pressure in an old boat cooling system , the time to fill coolant levels is HOT . With all the heat expansion in the water the resivoir can be filled to the top

FF
FF,are you engaging in a little "Marin baiting"?

It is clear from p.19 of the Lehman instruction book:
1.To commence the top up and air bleed of the cooling system procedure with the engine cold, completing it with cap off, thermostat open, air bleed valve closed .
2.Opening the air bleed valve on a hot engine will draw air into the system and "cause overheating"
3. "Extreme care should be taken in removing the cap while the engine is hot".
All of that also accords with commonsense. I`m thinking the metal in the engine expands,reducing the space for the coolant,rather than the coolant expanding,though the effect is the same, excess coolant is forced out. My new caps have reduced coolant loss significantly.
I`d put page 19 up if I had the skill, maybe Marin will, otherwise I`ll get help with it,for Lehman owners who don`t have the engine book. BruceK
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