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140/164 Series General Forum for the Volvo 140 and 164 cars |
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B20 thermostat 92cViews : 1215 Replies : 13Users Viewing This Thread : |
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Jul 22nd, 2024, 13:12 | #11 |
VOC Member
Last Online: Jul 25th, 2024 12:01
Join Date: Jul 2006
Location: Chatham
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Ron's cooling pages here https://www.sw-em.com/Cooling_System.htm
I've not seen the thermostats with that sort of flap valve but the extended plunger type is shown in a later diagram. With the thermostat out, if you look down into the hole you will see the top of a tube. This is what is sealed off by the plunger until the stat opens. Hopefully this tube isn't missing. It will be same on your PV. |
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Jul 23rd, 2024, 08:35 | #12 |
arcturus
Last Online: Yesterday 08:32
Join Date: Mar 2006
Location: Sagres Portugal
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So far with 89c,a touch on the high side with our hot weather (35c) but acceptable. Just need to adjust the Kenlow fan regulator
FYI QTH 135T 89c. Mahle TX 8 88d 88c. Might try the Mahle Thanks for all the info
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Jul 23rd, 2024, 16:21 | #13 | |
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Last Online: Yesterday 22:59
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Location: Saskatchewan, Canada
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Quote:
https://volvo1800pictures.com/docume..._B20A_B20B.pdf Pages 64 and 65 discuss the operation of the flap and the by-pass pipe. Failure to close the by-pass tube typically results in over heating because some of the coolant is not going through the radiator. |
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Jul 24th, 2024, 08:15 | #14 |
arcturus
Last Online: Yesterday 08:32
Join Date: Mar 2006
Location: Sagres Portugal
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thanks, that makes everything clear. Will remove 'stat and make sure that the top of the pipe has not worn and the 'stat actually makes clean contact and rectify if necessary.
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