I cleaned & carefully examined the head & block when we changed the head gasket. I saw nothing indicating a crack. On Feb 22, 2015 6:37 PM, "Curly McLain via Mercedes" <mercedes@okiebenz.com> wrote:
> Ah, thanks for the update. >> >> So, the next obvious thing should be to pull the head and have it >> pressured >> tested, no? The initial cause was a loss of coolant, so checking all >> those >> other things doesn't make much sense really. >> >> Jaime >> > > > There are many much less difficult tests that will point towards the > problem. > > 1. As discussed many times, block the thermostat open as recommended by > Jim Cathey months ago. In spite of the arguments, 3 bad thermostats in a > row is not unheard of. > > 2. Send an oil sample to Larry to see if coolant shows up. > > 3. Any good radiator shop can test for exhaust gas in the coolant > > Numbers 2 an 3 are better than pulling a head for nothing. > > 4. When it overheats, shoot temps on all areas of the block, head, hoses, > thermostat housing, WP, Radiator. That will tell you a lot. > > None of these tests require a lot of money, but you will get answers. > > None of these tests have been done. > > When the head was off did you see any cracks? they are obvious to the > naked eye. valve to prechamber, or valve to valve. the limit is 10mm > before the head must be replaced. In other words, the head can have 12 > cracks up to 9mm and still be ok to put on per the book. > > If my memory is right, I believe no cracks were found. It is unlikely > that a crack large enough to allow exhaust gas into the coolant developed > after the head was off, if not cracks were detected at that time. > > _______________________________________ > 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. > _______________________________________ 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.
