Home Technical Discussions BMW E21 3 Series 1975-1983 (320i/s, 323i)

BMW E21 3 Series 1975-1983 (320i/s, 323i) over heating


Permlink Replies: 5 - Pages: 1
Last Post: Jul 15, 2019 5:04 PM Last Post By: Shary555
honeylog

Posts: 1
Registered: 04/24/07
over heating
Posted: Apr 24, 2007 9:04 AM
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My 320 is overheating. I have tracked it to the theomstat.I am told to renew it I must buy the complete theomstat and housing as one piece. Is there an alternative part or method to the oringinal setup? The car is used on the road and track.
bane

Posts: 1
Registered: 05/27/07
Re: over heating
Posted: May 27, 2007 11:15 AM   in response to: honeylog in response to: honeylog
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I have BMW 315 /1981/.
Engine is overheating even I change termostat.What is going on???
autobahn

Posts: 516
Registered: 08/17/05
Re: over heating
Posted: May 27, 2007 7:33 PM   in response to: bane in response to: bane
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bane: possible other reasons for overheating:

-new thermostat defect or damaged
-radiator internally partially blocked (deposits)
-air passage externally (through the radiator) blocked
-coolant passages blocked in engine (corrosion - due to use of pure H2O instead of coolant)
-missing fan shroud (problem with high ambient-Temp and idle - vehicle stopped)
-defect water pump (cavitation)
-defect cyl-head-gasket
-defect cyl-head (cracked or uneven due to previous overheating)
-air trapped in cooling system
-defect fan clutch
RMCS

Posts: 1
Registered: 02/26/08
Re: over heating
Posted: Feb 26, 2008 8:32 AM   in response to: honeylog in response to: honeylog
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The 320I bmw thermostat can be replaced,You do not have to replace the housing. One thing to remember is to drill a small hole in the top position if the one you get did not have one. Thats to help the system bleed air out better.Cheers
jennifer247

Posts: 7
Registered: 06/01/19
Re: over heating
Posted: Jul 2, 2019 7:54 AM   in response to: honeylog in response to: honeylog
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Shary555

Posts: 3
Registered: 06/23/19
Re: over heating
Posted: Jul 15, 2019 5:04 PM   in response to: honeylog in response to: honeylog
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