BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      03-01-2017, 04:38 PM   #23
Suprgnat
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Quote:
Originally Posted by bNks334 View Post
The 128i auto got NOTHING. The 128i manual got a water to oil "heat exchanger."
Not even that. I think the only US spec N52 that got the cooler was the E60.
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      04-22-2017, 09:54 PM   #24
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I don't understand the thermostat. I don't see any connection from the car to the thermostat? It just works all on it's own, opening at some set temperature?
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      04-24-2017, 09:53 AM   #25
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Quote:
Originally Posted by Hops128i View Post
I don't understand the thermostat. I don't see any connection from the car to the thermostat? It just works all on it's own, opening at some set temperature?
Thermostats are a very basic thing. There is a rod that covers the oil passages when the oil is cold. As the oil warms up, the spring that holds the rod in place changes properties and pushes the rod away from blocking the oil passages. Oil is then free to flow through to the oil cooler. This mechanical operation does not require any electrical connections.



The stock spring and piston, sourced from a ton of difference cars, all appear to operate betweeen 230-250f. That's the oil range my 135i operates in. Anything over 255f or so and I've exceeded the stock oil coolers ability to shed heat from the oil or the radiators ability to shed heat. Either way, if your 128i is running over 250f oil, it's time for an upgrade.

Last edited by bNks334; 04-24-2017 at 10:02 AM..
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      01-13-2020, 09:39 AM   #26
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Old thread, but great DIY, any chance to get the pics fixed in the original post?
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