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Engine heater in E39 M5?

5K views 18 replies 12 participants last post by  M5_NOR 
#1 ·
Does anyone have engine heater in E39 M5?
Electrical(Defa/Calix) or petrol (Webasto/Eberspacher)?

I would like to know is it possible to have one of those in M5?
Other option for my M5 is 6 months in garage every year and buying some older BMW like E34lovelove 525-535 for wintercar
 
#3 ·
One of our Scandanavian members (I think) wrote a detailed post several years ago about how he configured his car with block heaters and I remember it being a nicely done job utilizing the fog light cover for the electrical connection. Can't recall who but a search should bring it up.
 
#7 ·
If I'm thinking of the same person, his engine heater ended up torching his car.
 
#5 ·
After a nasty cold snap last year I had the oil sticking to the engine instead of returning to the pan. I bought a glue on pan heater, it does work but only heats the oil. It also is only used for a max of 1 hour which makes it a bit of a pain. No plug and forget you have to think about when you will be driving the car.

That said until it gets below -25 I have had no issues or need for heat.
 
#6 ·
Defa heater is external and fitted to oil pan, as it heats the oil/block from below, the heat transfers to top of the engine too and gets coolant fluid warmer too. It is meant to ve on at least 2 hours and basically there is no max time for it. Although even in coldest temperatures over 5-6hours is not needed.
 
#13 ·
I was more thinking of the Webasto setup from 540/740, fuel driven, heats water + runs aux fans with timer already in place in Nav unit. - I guess it was dropped out from M5 due to space limitations (I think watertank for wipers is using that space on M5?)
 
#14 ·
Had one on my 530d - it was great. Lived in rear of right hand side front wheel well (when viewed from drivers seat)... Really pumped some heat out. Probably no reason why you could not retrofit a webasto in that gap if space is there.

I added remote key fob that could trigger it from up to 2km's way!

Simon
 
#17 ·
#18 ·
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