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Message: <blockquote data-quote="Brian Willcox" data-source="post: 604060" data-attributes="member: 55244">I started noticing the smell of burning coolant and found that I have some kind of leak.  I looked everywhere and could see fluid in spots, but couldn't find a bad hose or anything.  I have been having to add coolant/water in the resovoir for a few weeks now, so I know it is substaintial.  I finally took it to a local repair shop and they said that the actual thermostat housing has a pinhole leak.  Supposedly the housing is plastic and after a while (i just turned 100,000) from the heat this can happen, they have seen it before.  They also mentioned that the new replacement part from Ford is a different design, possibly improved.  Has anyone had this problem?  They are wanting to charge $425 for parts & labor.  Is this something I could do?  I have some mechanical experience (just changed those damn spark plugs and wires with success), and my dad has good mechanical experience.Also, while they are doing this, would it be a good idea to replace the actual thermostat, it is the original one.2001 ST with just over 100,000 purchased October 01.Sorry for the long post, thanks in advance!!!</blockquote>