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  #1  
Old 02-10-2011, 12:32 PM
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Changed water pump ... now no coolant circulation ...

... can anybody tell me what I need to do to get this darn thing working? I ran it up to about 185F and then shut it off; it was still blowing ice cold out the heater vents. Strategic heater-hose removals revealed there was no flow going on.

I guess my next move is to pull the T-stat and see if that fixes the problem, but I thought I oughtta see if any of you guys were familiar with this phenomenon.

Thanks!

--Finn

p.s. I also removed the inop A/C compressor, in case that is relevant. There was a line that plugged into the T-stat housing, which I pulled -- I figured it was a sensor -- maybe it was a valve? I'm stumped.
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76 Merc 300D, sky-blue, *86k, for driving
84 Jaguar XJ6, black, 245k, for restoring someday
71 Merc 408, 2.3 petrol 4, Avon caravan conversion (UK), RHD
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  #2  
Old 02-10-2011, 12:42 PM
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Quote:
Originally Posted by FinnJohn View Post
I ran it up to about 185F and then shut it off; it was still blowing ice cold out the heater vents. Strategic heater-hose removals revealed there was no flow going on. ...I'm stumped.
Before you remove anything, be SURE you don't have an air bubble in the system. Air will prevent good flow, and it's sometimes difficult to get it all out.
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  #3  
Old 02-10-2011, 01:30 PM
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Gotta be an air bubble. Nothing else I can think of. Any ideas for how to get rid of it?
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Finn John -- Albany, Ore.
www.offbeatoregon.com
76 Merc 300D, sky-blue, *86k, for driving
84 Jaguar XJ6, black, 245k, for restoring someday
71 Merc 408, 2.3 petrol 4, Avon caravan conversion (UK), RHD
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  #4  
Old 02-10-2011, 01:39 PM
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Yup I'm guessing an air bubble too. Sometimes squeezing the upper raditor hose a bunch of times will push the air through. Or try pointing the front of the car up hill while running it to encourage the bubbles to work back up to the raditor.
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  #5  
Old 02-10-2011, 01:59 PM
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Thermosta backwards might be also.
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  #6  
Old 02-10-2011, 02:02 PM
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heater core by-passes t-stat. get that air bubble out
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Old 02-10-2011, 02:12 PM
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Did you back fill coolant through the upper radiator hose?
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Going back to the original post: "Can you get the vac to blow instead?" No. Vacuums are low pressure so they by nature "suck" and nature abhors them.
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  #8  
Old 02-10-2011, 02:35 PM
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Park on a hill with the front up. Remove the upper radiator hose and fill the block through that hose. Reattach the hose. On that hill, run the engine with the heater on full blast. That should burp it.
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  #9  
Old 02-10-2011, 06:44 PM
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Yes! We have lift-off! Thanks, everybody. Da sun is shinin', da boids is choipin' an' all is right wit da woild.

--Finn
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Finn John -- Albany, Ore.
www.offbeatoregon.com
76 Merc 300D, sky-blue, *86k, for driving
84 Jaguar XJ6, black, 245k, for restoring someday
71 Merc 408, 2.3 petrol 4, Avon caravan conversion (UK), RHD
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