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#11
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Antifreeze Type?
On Thu, 22 Apr 2004 20:11:48 -0400, "Jeff Morris"
wrote: I'm in the middle of changing the antifreeze in my Yanmar 2GM20FC engines and am curious if I should change type. I've been using Ethylene Glycol, following the advice of a Yanmar mechanic who said using Propylene Glycol would void my warranty. I've never been able to verify that, and I'm now long out of warranty so I'm wondering if its time to switch to the more environmentally friendly Propylene. I also think that using the easy to dispose propylene would encourage me to change more frequently. Secondly, if I do change, do I have to flush out all of the old, or is it sufficient to just drain it? TIA, Jeff I'm curious, my Yanmar manual says to use water. My boat came with the orange/pink antifreeze, though. I'm not in an area where freezing is a risk so I have added occasional water. Gotta find that leak.... |
#12
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Antifreeze Type?
Even worse are those that claim to be 'engineers' (with no
qualifications to back the claim up) and who claim to be successful at 'fixing' things... Cheers Evan Gatehouse wrote: Do you have an owner's manual for the engine? It would probably tell you. Failing that, contact a local Yanmar dealer. Mechanics are a frequent source of misinformation. |
#13
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Antifreeze Type?
Even worse are those that claim to be 'engineers' (with no
qualifications to back the claim up) and who claim to be successful at 'fixing' things... Cheers Evan Gatehouse wrote: Do you have an owner's manual for the engine? It would probably tell you. Failing that, contact a local Yanmar dealer. Mechanics are a frequent source of misinformation. |
#14
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Antifreeze Type?
In terms of freeze protection propylene glycol would work just as well, in
fact better, than ethylene glycol if mixed in the proper proportion. The "problem" with the pink propylene glycol is that it does not contain anti-corrosion / anti-scaling additives that the green ethylene glycol does. If you could find propylene glycol that was specifically formulated for use in engines it would probably be OK. Most is sold for freeze protection in RV and cottage water systems where its non-toxic property is needed. As for changing antifreeze, the glycol does not degrade, it is the additives which are used up over time. You can confirm this by having the freeze point of your cooling system checked. If you constantly add water you will eventually dilute the glycol too much and then it would need a change. The additives would also be diluted this way. I imagine the long-life antifreeze has more additive or a more stable type but if you frequently add water you may negate this advantage. "Jeff Morris" wrote in message ... I'm in the middle of changing the antifreeze in my Yanmar 2GM20FC engines and am curious if I should change type. I've been using Ethylene Glycol, following the advice of a Yanmar mechanic who said using Propylene Glycol would void my warranty. I've never been able to verify that, and I'm now long out of warranty so I'm wondering if its time to switch to the more environmentally friendly Propylene. I also think that using the easy to dispose propylene would encourage me to change more frequently. Secondly, if I do change, do I have to flush out all of the old, or is it sufficient to just drain it? TIA, Jeff |
#15
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Antifreeze Type?
In terms of freeze protection propylene glycol would work just as well, in
fact better, than ethylene glycol if mixed in the proper proportion. The "problem" with the pink propylene glycol is that it does not contain anti-corrosion / anti-scaling additives that the green ethylene glycol does. If you could find propylene glycol that was specifically formulated for use in engines it would probably be OK. Most is sold for freeze protection in RV and cottage water systems where its non-toxic property is needed. As for changing antifreeze, the glycol does not degrade, it is the additives which are used up over time. You can confirm this by having the freeze point of your cooling system checked. If you constantly add water you will eventually dilute the glycol too much and then it would need a change. The additives would also be diluted this way. I imagine the long-life antifreeze has more additive or a more stable type but if you frequently add water you may negate this advantage. "Jeff Morris" wrote in message ... I'm in the middle of changing the antifreeze in my Yanmar 2GM20FC engines and am curious if I should change type. I've been using Ethylene Glycol, following the advice of a Yanmar mechanic who said using Propylene Glycol would void my warranty. I've never been able to verify that, and I'm now long out of warranty so I'm wondering if its time to switch to the more environmentally friendly Propylene. I also think that using the easy to dispose propylene would encourage me to change more frequently. Secondly, if I do change, do I have to flush out all of the old, or is it sufficient to just drain it? TIA, Jeff |
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