What is the best way to change the antifreez in a 2GM20F,how did you flush the system before adding new long life antifreez. nick
Fresh water system 2GM20F
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Read the manual...
But, on the Stbd side of the engine there are 2-3 little plastic tubes that hang down. Place a cup/bottle under them, open the cap to the reservoir and the radiator hose (on my H285, they're in the lazarette)and then turn the little faucets at the top of the little plastic tubes. This will drain the antifreeze out of the engine. Refill with yor favorite fresh antifreeze. Takes about 1 hour. Hope this helps.
But, on the Stbd side of the engine there are 2-3 little plastic tubes that hang down. Place a cup/bottle under them, open the cap to the reservoir and the radiator hose (on my H285, they're in the lazarette)and then turn the little faucets at the top of the little plastic tubes. This will drain the antifreeze out of the engine. Refill with yor favorite fresh antifreeze. Takes about 1 hour. Hope this helps.
engine flush
Nick You'll need to drain the block as well as all hoses incl. those to/from the hot water heat exchanger. After completing that, fill with clean water and run the engine to circulate and ensure you top off the exchanger. Also flush the overflow tank. Drain everything again and check the color - if it's clear water, you succeeded in removing all the old stuff and can then drain and refill with a fresh antifreeze mix. Only caution is to make sure you leave no air pockets. Don Illusion
Nick You'll need to drain the block as well as all hoses incl. those to/from the hot water heat exchanger. After completing that, fill with clean water and run the engine to circulate and ensure you top off the exchanger. Also flush the overflow tank. Drain everything again and check the color - if it's clear water, you succeeded in removing all the old stuff and can then drain and refill with a fresh antifreeze mix. Only caution is to make sure you leave no air pockets. Don Illusion
Thanks Guys
Sounds good draining the old antifreez into a bucket and than hooking up a garden hose on the hose fitting that is already on the heater hose and let it pump out also adding fresh water to completely flush out system while running the engine before adding new antifreez,thanks again. nick
Sounds good draining the old antifreez into a bucket and than hooking up a garden hose on the hose fitting that is already on the heater hose and let it pump out also adding fresh water to completely flush out system while running the engine before adding new antifreez,thanks again. nick
flushing antifreeze
Nick, the previous suggestions are all good, but do it several times before you put in the new AF. the old (green) and new (orange silicate free) long life AFs are not compatible and even a little residue of the old stuff will contaminate the new
Nick, the previous suggestions are all good, but do it several times before you put in the new AF. the old (green) and new (orange silicate free) long life AFs are not compatible and even a little residue of the old stuff will contaminate the new
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