Engine Block Heaters

How is the DEFA EBH attached to the engine? Pictures? Thanks!

 

The DEFA EBH is clamped to the rear of the block. To visualise, [after removing the undertrays] slide under the car until your head is just behind the front wheels. Look up and you'll see the rear of the block. EBH clamps in a recess between the cylinders. So I really didn't have to dismantle anything to install the EBH, unlike the Canadian EBH!
Routing the cable was trickier. In Europe, they must be fitted by an authorised dealer, which are everywhere. In Australia I had to figure it out and found a method that allows lower grill blocking.
DEFA SafeStart Engine Block Heater | PriusChat
Full stories and pix on my blog. DEFA | Bradley's Raw Data Feed

 

It would be a guess only. I don't have a regular commute (I catch the bus to work), I've been modifying the car and myself and the weather is getting warmer. So it's hard to calculate the baseline.
However, most journeys from my house are down one road if I'm driving to the City or another if I'm driving to Sydney.

• One regular, morning journey I take was in the range 4.0-5.0LHK (45-55 mpg US); now in the range 3.0-4.0LHK (55-75 mpg US).
• Tank averages have improved steadily (but note improving weather and the lack of a steady baseline).
• The HSI shows low 4's LHK after only 2km of driving. Without EBH the HSI would read 8 LHK after 2km and might take 5km to get into the 4's.
• With EBH I reach stage 2 immediately (well, after the coolant circulates) and stages 3 and 4 come quickly. Without, stage 2 may take 2km.

I've got some observations on my blog. My gut feeling is that the EBH and the electricity to feed it is well worth it and there's some evidence to back that up. Some.

 

After receiving my engine block heater today saw there were no instructions in box.
Remembered there was an associated file on the prius shop site with the EBH location.
The link goes nowhere.
Not worried about the install just looking for a drawing or some general info on install.
Anyone have that info from the shop site as a file to d'load or email?

mucho appreciado

 

Here's a diy instruction:

3rd-gen block heater

 

M Leisk - thank you
I'll look it over.
But I would think that the guy doing the install would have put on a nicer shirt if he knew a photographer was on site.

 

i put it in myself. its a bit awkward.....but possible without remove everything like that link points to.....
the hard part is puting into block itself....couple connections just in the way slightly

 

Yeah, he mentions the cowl/wiper removal was partly for photo op. The pics are from the second install, and the first was done just from the underside, cowl left in place.

It is an eye opener though, taking off cowls. Our previous Honda Civic Hybrid was similar: cowl removal was more-or-less mandatory to even get at the back row of spark plugs (2 per cylinder). And definitely needed if you wanted to get to the valves for adjustment.