02GF74
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| posted on 22/3/15 at 06:35 PM |
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cooling question
Volvo 850 T5
Replaced coolant temp sensor and coolant, approx 50/50 glycol/deionised water.
Next days commute (4 miles) noticed car takes longer to warm up, needle reaches 3 o clock pos and sits there, used to take about 10 mins but took
20.
Did a longer journey today at higher speeds 15 miles and needle reaches steady state but never got over 4 o clock. Air coming out of vents does not
feel as hot.
If car is left stationary needle will reach 3 o clock and fan keeps it there so i dont think the cts is faulty.
Surely a coolant change cannot account for this, afaik it was the original stuff that is 20 yrs old. Thermostat was not touched.
Should i be concerned?
I will get IR thermometer to measure coolant temp.
[Edited on 22/3/15 by 02GF74]
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theprisioner
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| posted on 22/3/15 at 06:42 PM |
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Air lock in heater hose is my guess
http://sylvabuild.blogspot.com/
http://austin7special.blogspot.co.uk/
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rusty nuts
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| posted on 22/3/15 at 06:44 PM |
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Air lock
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02GF74
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| posted on 22/3/15 at 06:50 PM |
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Hmmmmm.... need to read manual. I thought itd be self bleeding and just filled via the expansion tank.
No special steps mentioned in manual.
Dont airlocks cause overheating?
[Edited on 22/3/15 by 02GF74]
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theprisioner
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| posted on 22/3/15 at 06:55 PM |
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RTFM is good place to start
http://sylvabuild.blogspot.com/
http://austin7special.blogspot.co.uk/
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02GF74
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| posted on 23/3/15 at 08:24 AM |
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Been pondering over this, thermostat stuck open would cause this, change of coolant being coincidental?
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theprisioner
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| posted on 23/3/15 at 09:46 AM |
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Take the feed pipe to the heater matrix at highest point possible, release pipe clip and partially remove pipe till coolant emerges.
http://sylvabuild.blogspot.com/
http://austin7special.blogspot.co.uk/
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