Posted by miloblues04 (miloblues@…>)
I bought my 85 F32 used. The coolant in the heat exchanger was green
prestone. I decided to flush the heat exchanger last weekend and
upon asking the marine store if they had any radiator flush, i was
told: “you are using extended life anti-freeze i hope.”
Then i was told the green stuff contains silica that corrodes the
heat exchanger, but that i’d better not switch to extended life
unless i’m absolutely certain that all the green stuff is out because
combining the two will create a gel that will ruin the engine.
I followed the directions of the flush but wasn’t convinced the 3
heat and drain steps i took completely rid the green stuff from the
system, so I replaced the green stuff using a 50/50 water ratio.
Has anyone sucessfully switched fom green to extended life?
Any input would be greatly appreciated.
Thanks,
Milo
Posted by Lorman, Alvin J. (ajlorman@…>)
Since I just changed from the green stuff to DexCool with just a fresh water flush, you got me worried. I did a little web research and found that there are a lot of urban legends about DexCool. Texaco, which makes a nitrate free DexCool product specifically for diesel engines, recommends flushing with water only before changing over. The gelling that can happened with DexCool seems to be a function of loss of coolant water. As to mixing the two, one of the articles I read said that you can top up orange with green, but then you should change the entire system later.
I’ll let you know in a year or so.
Al Lorman
-----Original Message-----From: miloblues04 [mailto:miloblues@…] Sent: Tuesday, October 26, 2004 9:12 AMTo: freedomyachts2003@yahoogroups.comSubject: [freedomyachts2003] Yanmar 3GM / Anti-freeze paradox (green to red switch?)I bought my 85 F32 used. The coolant in the heat exchanger was green prestone. I decided to flush the heat exchanger last weekend and upon asking the marine store if they had any radiator flush, i was told: “you are using extended life anti-freeze i hope.” Then i was told the green stuff contains silica that corrodes the heat exchanger, but that i’d better not switch to extended life unless i’m absolutely certain that all the green stuff is out because combining the two will create a gel that will ruin the engine.I followed the directions of the flush but wasn’t convinced the 3 heat and drain steps i took completely rid the green stuff from the system, so I replaced the green stuff using a 50/50 water ratio.Has anyone sucessfully switched fom green to extended life?Any input would be greatly appreciated.Thanks,MiloThis email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail.
Posted by Jerome Weinraub (zayde@…>)
I recently spoke to Yanmar rep from Mack boring,and he said Yanmar requires
red antifreeze,which is specific for diesels. Yanmar sells it,and I got mine
from my local Caterpillar dealer. It is formulated differently,and is good
for 2 years. If you flushed at least 3 times,drained the block and the
exchanger,all the green is out. BTW,it is the block,not the heat exchanger
that is at risk. The block contains some aluminum,the heat exchanger is cast
iron ,bronze and what looks like cupro-nickel . Neat design-salt water never
touches cast iron.
----- Original Message -----
From: “miloblues04” <miloblues@…>
To: <freedomyachts2003@yahoogroups.com>
Sent: Tuesday, October 26, 2004 9:11 AM
Subject: [freedomyachts2003] Yanmar 3GM / Anti-freeze paradox (green to red
switch?)
\
I bought my 85 F32 used. The coolant in the heat exchanger was green
prestone. I decided to flush the heat exchanger last weekend and
upon asking the marine store if they had any radiator flush, i was
told: “you are using extended life anti-freeze i hope.”
Then i was told the green stuff contains silica that corrodes the
heat exchanger, but that i’d better not switch to extended life
unless i’m absolutely certain that all the green stuff is out because
combining the two will create a gel that will ruin the engine.
I followed the directions of the flush but wasn’t convinced the 3
heat and drain steps i took completely rid the green stuff from the
system, so I replaced the green stuff using a 50/50 water ratio.
Has anyone sucessfully switched fom green to extended life?
Any input would be greatly appreciated.
Thanks,
Milo
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