Help! Replaced Water Pump and Themostat Now Engine Runs Cold

davestx Help! Replaced Water Pump and... 12-24-2009, 01:16 AM

mpolli How good is your mechanic? ... 12-24-2009, 01:38 AM

Cal Learner Wrong thermostat, or... 12-24-2009, 08:02 AM

meltedpanda thermostat needs to be... 12-24-2009, 09:13 AM

davestx Thank you for your replies.... 12-24-2009, 09:22 AM

meltedpanda there is a small arrow on the... 12-24-2009, 09:48 AM

davestx Thanks I will ask the... 12-24-2009, 10:21 AM

meltedpanda remove (slowly) the overflow... 12-24-2009, 11:40 AM

Strife Brand spankin new thermostats... 12-24-2009, 04:52 PM

mpolli So, maybe it opened once,... 12-24-2009, 05:42 PM

dhjenkins Did he put it in facing the... 12-24-2009, 11:20 PM

davestx I drove the car today and was... 12-25-2009, 02:10 AM

mpolli That's just how mine acted,... 12-25-2009, 02:53 AM

davestx He bought the part form a... 12-25-2009, 10:04 AM

More replies below current depth...

12-24-2009, 01:16 AM

davestx

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Join Date: Apr 2006

Location: Mountain View CA.

Posts: 74

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Help! Replaced Water Pump and Themostat Now Engine Runs Cold

My mechanic just replaced my water pump and thermostat on my 91 Mercedes 420 SEL with a 560 motor. Now the engine barely warms up. It used to run at just over 80C. Now it is barely getting to 50C and the heat is no longer very hot in 25 degree Fahrenheit weather. The thermostat was bought at Mercedes. Any ideas would be appreciated.

Thanks

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1988 420 SEL
1991 420 SEL with 560 motor
1993 Miata

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