Coolant leak in 12v

[Elliott Potter]

Stuart Friedman wrote:
> 
> I have had this looked at my two very competent  mechanics, no identified
> source of the leak. I los about a quart every 2500 miles.
> 
> On one occasion  I spotted some coolant on the ground behind the passenger
> side (US) wheel.
> 
> Any hints on how to track this one down?

Avi's suggestion (coolant line to the head) is a good place to start. 
Also check for coolant running down the side of the head, i.e. bad head
gasket.  Check your oil and make sure it isn't foaming...rules out that
possibility.  Also you might pull your spark plugs and look for one
that's especially clean and shiny (again blown head gasket).  Feel
around the radiator fan thermoswitch, which is screwed into the bottom
passenger's side of the radiator facing the engine.

Oddly enough, last time I saw fluorescent green fluid behind the
passenger's side front wheel, it was PAG oil from the A/C and not
coolant.  There aren't a whole lot of places for coolant to leak from on
that side of the engine ... on the driver's side you've got the oil
cooler and the reservoir and a bleeder screw but on the passenger's side
there just aren't many junctions.

Speaking of bleeder screws, there's one on the hose that goes to the
heater core, which is nearly dead center on the top of the firewall (two
hoses).  The screw there is plastic and prone to crumble.  That's
another possibility.

HTH,
--
Elliott