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E38 735i Engine thermostat


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Hello all.

I am trying to find a 88C or lower engine thermostat for my E38 735i to replace the 105C thermostat without much luck. I do know that there are lower temperature replacment outther, see it in other forums, but I ca not locate one .Can anyone help please.

Many thanks a new member

D

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Morning Dimitris

Welcome to the Forum

With the E53 4.6is I fitted an Electric Engine fan from a later 4.4 model controlled by aan 88deg thermostat inserted in the top hose, that combined with a Febi engine thermostat rated the same kept things cool even when towing our Horse trailer

Hope this helps

Dave

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Hello.

Thank you for the responce. I have decided to change just the engine thermostat for now to an 88C MAHLE from an E38 740D engine. It doe not have the electric resistor but i have read that this will not cause any issue.

I am interestead on the lectric option. How did you integrate that and from which vehile does it come from?

 

Thanks

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Hi Dimitriis

I used a Thermal Fan Switch 38mm for the top hose on a V8 Defender/Discovery. The actual Electric fan came from a later model 4.4 V8 X5 and after removing the engine driven fan and shroud was a straight replacement just needed a little thought wiring it in so it looked OEM

Good Luck

Dave

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Morning 

The car i did the upgrade on was a BMW X5 4.6is 2003 not a 7 series however the engine in your car should be an M62 V8 my 4.6is was also M62, just a larger version of your engine

Dave

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