Brought the '94 wagon in for brakes and rotors all the way around and to find a slow coolant leak and the dealer said that the coolant was seeping out the passenger side of the head gasket near the rear of the engine. This is not the original head gasket as I had that replaced at 67,000 miles. Looking at about $1,200 for that job. I'll do a 'search' looking for other things to do when they have the head off. I don't know the design of the headgasket but I thought oil usually leaks out at that spot.

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dtf
1994 E320 Wagon (Died @ 308,669 miles)
1995 E300 Diesel (228,000)
1999 E300 Turbodiesel ( died @ 255,000)
2006 Toyota Tundra SR5 AC 4X4 (115,000 miles) rusted frame - sold to chop shop
2011 Audi A4 Avant (165,000 miles) Seized engine - donated to Salvation Army
BMW 330 xi 6 speed manual (175,034 miles)
2014 E350 4Matic Wagon 128,000 miles
2018 Dodge Ram 21,000 miles