First E34 518i - Please Help - BMW Forum - BimmerWerkz.com
5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

 
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#1 (permalink) Old 08-15-2009, 08:51 AM
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First E34 518i - Please Help

hello guys, got my first 5 series today. got a good price for it. Everything working fine, however there is one problem. The temperature gauge on the dash stays on cold. it doesnt move even after driving for a good 30mins. im concerned about it as i wouldnt know if the car was overheating at all.

Has anyone any ideas what this could be? the car drives fine with no problems at all other than this minor glitch.

Thanks
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#2 (permalink) Old 08-15-2009, 10:09 AM
OMFG another one!?
 
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A couple of things to check would be the temp sensor and the leads from it.

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#3 (permalink) Old 08-15-2009, 10:14 AM
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As witeshark says temp sensor at the outmost it may be a delay in the thermostat opening, cheapest way is replace the temp sensor. I would say at this point the wiring is fine as it works after 30 mins.

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#4 (permalink) Old 08-15-2009, 08:46 PM
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Replace the coolant temperature sender and the thermostat; it's guaranteed to solve the problem. Yes, there is a way to test both and see which it is exactly, but as cheap as both of the parts are (shouldn't cost you more than ... 20 or 30 pounds for both), you might as well just replace them and not bother testing them.

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#5 (permalink) Old 08-16-2009, 03:18 AM
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Quote:
Originally Posted by Mike_E34UK View Post
hello guys, got my first 5 series today. got a good price for it. Everything working fine, however there is one problem. The temperature gauge on the dash stays on cold. it doesnt move even after driving for a good 30mins. im concerned about it as i wouldnt know if the car was overheating at all.

Has anyone any ideas what this could be? the car drives fine with no problems at all other than this minor glitch.

Thanks
ummm... why do i get a gut feeling the thermostat was taken out by the previous owner? ;-)
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#6 (permalink) Old 08-16-2009, 03:24 AM
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have just found out from the previous owner, he brought the 5 with no engine in it. He put in a 1.8i from a 3 series BMW that was used for track racing, so there is no thermostat in the car. I use the car for work, so abit of long distance driving? am i likely to overheat? and would it be simple enough to put in a thermostat then? except i wouldnt know exactly which one it needs as ive been told the engine is from a 3 series, but he is not sure what year... how annoying!

thanks guys
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#7 (permalink) Old 08-16-2009, 05:37 AM
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To install the thermostst is relatively easy, somewhere on the engine you will find the part number, tap it in here and it should give you the year etc for the engine ( just click enter, leave the submit box blank):

RealOEM.com Online BMW Parts Catalog

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#8 (permalink) Old 08-16-2009, 05:53 AM
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thanks, ill have a search for the part number in a sec.

*Update* only number i could find was 11121727776 which doesnt find anything on that website. hmm, where abouts would the part number normally be? i cant use the VIN as engine has been changed

Last edited by Mike_E34UK; 08-16-2009 at 06:08 AM. Reason: updated
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#9 (permalink) Old 08-16-2009, 06:34 AM
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11121727726 is the correct number, and its for a gasket, helpfull.... not. haha. I know its an M40 engine. So would the thermostat and housing be the same across all M40's?

i found the thermostat housing still attached to the car, the actual thermostat must have been removed from inside of it, however i cannot see any wires local to the housing, so im not sure if there is any wiring that is missing also. ohh what a mystery

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#10 (permalink) Old 08-16-2009, 10:18 AM
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The housing would indeed be the same for all M40s, regardless of what they came out of.

Running no thermostat is fine. It will not overheat ... actually, it wont really ever get to normal operating temperature which means it wont be as efficient as it should be.

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#11 (permalink) Old 08-16-2009, 05:54 PM
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Quote:
Originally Posted by Mike_E34UK View Post
have just found out from the previous owner, he brought the 5 with no engine in it. He put in a 1.8i from a 3 series BMW that was used for track racing, so there is no thermostat in the car. I use the car for work, so abit of long distance driving? am i likely to overheat? and would it be simple enough to put in a thermostat then? except i wouldnt know exactly which one it needs as ive been told the engine is from a 3 series, but he is not sure what year... how annoying!

thanks guys

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