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#1
10-13-2017, 08:53 PM
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No heat.. clogged beater core?
1987 300d. Am I leaning in the right direction the heater core is clogged? I have no heat even on defrost. The monovalve itself is hot and the hose going to it from the engine is slightly warm, but the hose on the back of the monovalve going to the cabin is completely cool. No warmth to touch.
If it is the beater core. What hoses do I use to flush it and How? Sorry aytocrect keeps calling it a beater core. 
__________________
Only diesels in this driveway.  2005 E320 CDI 243k Black/Black 2008 Chevy 3500HD Duramax 340k 2004 Chevy 2500HD Duramax 220k 
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#2
10-13-2017, 09:07 PM
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I would suspect the valve first, something else second, and the heater core last. Good hunting.
__________________
It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein 09 Jetta TDI 1985 300D
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#3
10-13-2017, 09:35 PM
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When did this start? Was it after adding coolant? I'm wondering if there is an air pocket in the core.
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"Rudeness is a weak man's imitation of strength" - Eric Hoffer
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#4
10-13-2017, 10:00 PM
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I'd start with the valve too. Make sure it isn't sticking or clogged up. Check to see if the Aux pump is working. If it is, it's likely the valve. If it isn't, it may be worth it to pull and make sure it isn't clogged with silt or rust. The 603 still moves enough coolant through the heater core that it will heat fine without the Aux pump functional.
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Current stable: 1995 E320 157K (Nancy) 1983 500SL 125K (SLoL) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) Gone and wanting to forget: 1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]
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#5
10-13-2017, 10:31 PM
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No recent coolant. What's the best way to check the valve? Does it come apart easy. Also, I'd assume if I unplugged the connector, it should click to see if the valve is working right.
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Only diesels in this driveway. 2005 E320 CDI 243k Black/Black 2008 Chevy 3500HD Duramax 340k 2004 Chevy 2500HD Duramax 220k
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#6
10-14-2017, 03:09 PM
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Quote:
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1998 E300 turbodiesel America's Rights and Freedoms Are Not The Enemy!
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Linear Mode
