I have twin 135 ford Lehman engines My question is what is the cooling capacity for each engine they have a closed system. I am wondering how much of the pink stuff I need for each engine and if the pink stuff is better than car antifreeze. I have read in this forum that car antifreeze [glycol] should be mixed 50-50 with water is this correct or will the antifreeze automatically mix with the water in the cooling system. Also won't the water dilute the pink stuff to below the mfg. rating ie. 50F below?
135 ford desiel lehmans engines
- Thread starter ocean
- Start date
You have two sides to your cooling system; raw water from the sea and closed for the engine block and other parts. The heat is transferred in the heat exchanger where the fluids pass each other without mixing in a manner similar to a car radiator where air takes heat from a cars cooling water without mixing. Your closed system is just like your car, it needs about 50% automotive or glycol type AF and no pink stuff. The raw water side of the system is commonly flushed with pink stuff to prevent freeze damage in the event there are low pockets of sea water that don’t fully drain out when the boat is hauled. Old farts used to remove the raw water impeller to prevent it from taking a set during long storage.
The last time I winterized a set of Lehmans I used 6 gallons per engine. It took a while for the antifreeze to come out of the exhaust but the boat did had some pretty large mufflers.
Remember, in the whole scope of things...antifreeze is a lot cheaper than an engine repair.
Remember, in the whole scope of things...antifreeze is a lot cheaper than an engine repair.
I would talk to a trusted mechanic and ask him to look at your engines and give you an opinion. You can then plan from there. While people on this forum could tell you how much AF a given engine might take then cannot tell you how much your exhaust system will take in your boat. But it you saw AF coming out the exhaust, you should not be far off.