However, you can only see the outside. It is possible that a crack is between ports inside. the symptoms don't sound like a cracked head though. The best theory that I've heard so far is the floating piece of crap that blocks a passage sometimes, and not others. Perhaps (and this is a wild guess) it's a chunk of scale that broke off a surface inside a water passage and is now rotating from a blocking to non-blocking position. If so, and aggressive, extensive citric acid cleansing might dissolve it. Re member that you have to de-oil the coolant passages before the citric acid can fully work - dishwasher detergent is your friend . . .
On Sun, Feb 22, 2015 at 8:27 PM, dseretakis--- via Mercedes < mercedes@okiebenz.com> wrote: > Yes I couldn't see any flaws either. > > Sent from my iPhone > > > On Feb 22, 2015, at 8:16 PM, Dwight Giles via Mercedes < > mercedes@okiebenz.com> wrote: > > > > I cleaned & carefully examined the head & block when we changed the head > > gasket. I saw nothing indicating a crack. > > > -- OK Don NSA: The only branch of government that actually listens to US citizens! *“Travel is fatal to prejudice, bigotry and narrow-mindedness, and many of our people need it sorely on these accounts.”* – Mark Twain "There are three kinds of men: The ones that learns by reading. The few who learn by observation. The rest of them have to pee on the electric fence for themselves." WILL ROGERS, *The Manly Wisdom of Will Rogers* 2013 F150, 18 mpg 2012 Passat TDI DSG, 44 mpg 1957 C182A, 12 mpg - but at 150 mph! _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
