I have a 2006 Ram 2500 with Cummins. The water goes down a bit now and
again, and I refill it. Yesterday before hitting the road, I looked, and
the reservoir was nearly empty. I filled it.
That water has to be going somewhere, or is if going out the overflow? How
often should one have to refill that reservoir, if at all? And do I use
antifreeze, 50/50 mix? ??
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I haven't had to add for the past 190k miles except when the water pump
started weeping. I'm guessing you already looked at that and looked for
puddles too. Things to look at include your oil for contamination and
another weeping/leaking location is underneath by the turbo. There is a
short piece of "heater" type hose that has the kind of clamps that have a
history of coming loose. Check that for tightness. Also, the tube that
runs from the radiator cap area (for over pressure relief) should be dry at
the end. If it is wet, your cap is relieving pressure. Might be good news
(bad cap, replace), might be bad news (system over pressuring).
Have you ever sent a sample of your used oil to a lab for analysis? They
will tell you if there is any antifreeze in your oil as well as a lot of
other stuff. I use Blackstone http://www.blackstone-labs.com/ for my '03
Suddenly, without warning, beekeep exclaimed (5/30/2010 4:37 PM):
Didn't sound like anything, just the truck started overheating
(coincidentally after a flush), and when I looked under the hood, there
was fluid everywhere. I thought the shop hadn't put it back on right,
but it kept happening. A new radiator cap fixed the problem.
If you go to their site, it will show you how to order a FREE test kit
http://www.blackstone-labs.com/free-test-kits.php . It is only a few ounces
and you catch it while it is fairly hot when you drain your oil. Its $22.50
and mails through the regular postal for about $2.50 or so.
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