Replacing thermostat?
12-03-2009, 04:39 AM
#33
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Originally Posted by VW2545i' post='922071' date='Jun 24 2009, 10:32 AM
Replaced thermostat and the increaed emissions light went out. Checked the engines and running at correct temp. No more stuttering.
anybody have a DIY for a thermostat replacement.... something simple???? i have a 545i 05
12-10-2009, 07:17 PM
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After you replace the thermostat how do u run the automatic bleed program to bleed the system after you refill it with the new coolant? Or is this not necessary? Because I know that air bubbles can cause over heating
12-11-2009, 05:39 AM
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Originally Posted by turbo_mustang12' post='1071871' date='Dec 10 2009, 11:17 PM
After you replace the thermostat how do u run the automatic bleed program to bleed the system after you refill it with the new coolant? Or is this not necessary? Because I know that air bubbles can cause over heating
i got the following from the BMW TIS, hope this helps
12-17-2009, 04:07 PM
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My Ride: Jet Black '05 545i, Sport/Premium Pkg, Steptronic, Adaptive Xenon, Nav, L7, Blue2th, PDC,
after re-assembling the parts, i filled expansion tank with a 50/50 pre-mixed antifreeze, with engine off. what i noticed is the coolant level guide would slowly go back down as the coolant flowed to fill the void in the engine and/or radiator. i stopped filling as soon as the level stopped sinking. i then warmed up the engine (now would also be a good time to check for leaks). as soon as the engine was warm, i opened expansion tank and topped off with coolant.
12-18-2009, 04:27 AM
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Originally Posted by e6t.lab.rat' post='1075548' date='Dec 17 2009, 08:07 PM
WARNING! do this only when engine is cold!
i just replaced my coolant and while i was at it i also removed and inspected my thermostat. you wouldn't believe how simple it is to r&r. this is what you do: disconnect the temp. sensor, then unclip and disconnect the return hose (central hose leading to bottom half of radiator to the left-passenger side). remove 3 (10mm) bolts that hold thermostat to waterpump assy and you're done! the thermostat is built into its housing; this explains why our thermostat cost $140!!
what i did was this and no problems since:
after re-assembling the parts, i filled expansion tank with a 50/50 pre-mixed antifreeze, with engine off. what i noticed is the coolant level guide would slowly go back down as the coolant flowed to fill the void in the engine and/or radiator. i stopped filling as soon as the level stopped sinking. i then warmed up the engine (now would also be a good time to check for leaks). as soon as the engine was warm, i opened expansion tank and topped off with coolant.
i just replaced my coolant and while i was at it i also removed and inspected my thermostat. you wouldn't believe how simple it is to r&r. this is what you do: disconnect the temp. sensor, then unclip and disconnect the return hose (central hose leading to bottom half of radiator to the left-passenger side). remove 3 (10mm) bolts that hold thermostat to waterpump assy and you're done! the thermostat is built into its housing; this explains why our thermostat cost $140!!
what i did was this and no problems since:
after re-assembling the parts, i filled expansion tank with a 50/50 pre-mixed antifreeze, with engine off. what i noticed is the coolant level guide would slowly go back down as the coolant flowed to fill the void in the engine and/or radiator. i stopped filling as soon as the level stopped sinking. i then warmed up the engine (now would also be a good time to check for leaks). as soon as the engine was warm, i opened expansion tank and topped off with coolant.
great thanks.. i will order the thermostat + coolant and give it a shot. i found the thermostat for cheap $66.00
check below link
http://www.carpartsdiscount.com/auto/parts...html?3593=59621
12-18-2009, 03:10 PM
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My Ride: Jet Black '05 545i, Sport/Premium Pkg, Steptronic, Adaptive Xenon, Nav, L7, Blue2th, PDC,
Originally Posted by 2exclusive' post='1075824' date='Dec 18 2009, 05:27 AM
great thanks.. i will order the thermostat + coolant and give it a shot. i found the thermostat for cheap $66.00
check below link
http://www.carpartsdiscount.com/auto/parts...html?3593=59621
check below link
http://www.carpartsdiscount.com/auto/parts...html?3593=59621
11-14-2011, 03:28 PM
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Yes this is BMW dealership.. this was part of the diagnostic they ran. I dont have an ODB2 tool but i brought it to autozone and they said something about an mass flow sensor or something like that was bad. Is there any possible way the thermostat would cause an 'increased emissions' error???
We offer great OBD scanners at very low prices. You can choose the BMW option in Professional mode and it will not only give you a P-code but the interpretation and will support live data reading. They are a must have for every car owner.