EDIT: get a 35 mm block heater, fits under the 30 mm one I used, lower is better...
35mm:
DEFA does sell a 35 mm heater, but dont know if it will fit.
11431B 90331-35003 PLUG, TIGHT, NO.2 (FOR CYLINDER BLOCK). PLUG, TIGHT, NO.2 (FOR CYLINDER BLOCK) (08.1980-08.1987) 2H,12HT..HJ6*; OD=35,ID=14
11431A 96411-43500 PLUG, NO.1. PLUG, TIGHT, NO.1 (FOR CYLINDER BLOCK) (08.1980-08.1987) 2H,12HT..HJ6*; OD=35
http://www.partsbase.org/toyota/land...ylinder-block/
http://www.sor.com/sorimages/product/052-50_i-diesel2-big.jpg
Other hj60 block heater thread:
https://forum.ih8mud.com/diesel-tech-24-volts-systems/787510-coolant-leak.html#post9023041
11431B 90331-35003 PLUG, TIGHT, NO.2 (FOR CYLINDER BLOCK). PLUG, TIGHT, NO.2 (FOR CYLINDER BLOCK) (08.1980-08.1987) 2H,12HT..HJ6*; OD=35,ID=14
11431A 96411-43500 PLUG, NO.1. PLUG, TIGHT, NO.1 (FOR CYLINDER BLOCK) (08.1980-08.1987) 2H,12HT..HJ6*; OD=35
http://www.partsbase.org/toyota/land...ylinder-block/
Looking for water freeze plug part # need one in the dashboard for if the heater breaks or ...
11116C PLUG, TIGHT, NO.3
96411‑43000 12HT, 2H..HJ6*, OD=30 12 € 5.01
(OD = Outside Diameter ID = Inside Diameter)
Below is also some info about the 50 mm freeze plug located 3 cm from the firewall (and with 3 cm space installation is impossible with the engine in the car, still looking for answers there)
I am looking for a heater and in the picture above is DEFA 411122 (Truck) 600 Watt:
But at this moment no EU webshop where I can order.
Found in Poland for 45 euro, I want one!
Of course the Germans have it, lol:
http://www.kuehlbox-profi.de/A411122
And I need the cable A460785 to connect it. So 73 euro for 411122 + 50 euro for A460785 =123 euro
123 and gone is my money...
Ended up with 203 euro delivery with DHL and I also "needed" a battery watch and 24V water cooker for tea and noodles
DEFA -Engine heater
411122
http://www.defa.com/en/automotive/warmup/find_your_engine_heater/
PDF:
https://drive.google.com/file/d/0B6D936BcfemZUjZ0Z3Z2OUJucFE/edit?usp=sharing
https://drive.google.com/file/d/0B6D936BcfemZc3k1OHM1WUpDS3M/edit?usp=sharing
I got a package today, installing later or tomorrow @ daylight. EDIT: completly the worst accessible place to find and place this $#@^thing. Remove hood, remove heater hoses, remove engine, remove rear hatch, remove the fu.. himalaya to fit this thing...
The freezeplug 30 mm part number is:
11116C PLUG, TIGHT, NO.3
96411‑43000 12HT, 2H..HJ6*, OD=30 12 € 5.01
Dont slam it in completely! I ordered the freeze plug to keep in the glove box, the old one can also be reused.
First make sure the device works, test in water.
Thoroughly clean the frost plug hole.
Test the dept with an 28 mm test probe, it is only a few mm and it should fit, but test it first.
Fit the heater.
Position the connector in the clock direction indicated in the table. EDIT: Forget clock, it does not matter what direction the plug faces.
Because the heater can leak I want to try to face the plugside upwards so it wont leak into the plug.
Tap the heater straight into the frost plug hole.
Make sure there is clearance all the way between the shoulder of the heater and the engine block(1)
The outside plug needs to be fitted so that the cap is facing down, and I needed to cut a hole in the lowest point of the plug to drain water.
So this thing can only be installed in the last freeze plug next to the firewall!
The first 2 plugs are covered, one is not covered but no room to install, then two are covered.
The furthest place possible is the only place that has room to install, really a back breaker!
Maybe I should wait till after the winter to install this

what a pain if a picture is hardly possible!
So I hit the freezeplug and it turnd sideways, then it was easy to pull out with pliers.
Needed 7 liter of coolant to refill (after burping)
THE HOLE!
cleaning it to remove old residu I also used some sand-clothing (not sandpaper)
Yes it works, takes at least two hours or more to heat, after one hour the thermostat (opposite side of the heater) is also getting warm, also the upper large hose on the radiator is getting warm, good progress.
Still testing.
There is also a 50 mm heater and you need 96411‑45000 PLUG, TIGHT, 50 mm to close it.
The 50 mm heater has te be installed on the lower freeze plug on the cabin side.
There are a few options and sizes:
But please search further before you order.
-rad heater: dont want it, when the engine is warm the thermostat will open and the rad wil be heated by the engine.
-oil pan sticky type heater: dont want it, it will heat the north-pole before the engine warms up.
-inline heater, dont want it, dont know what hose to cut and I want the heater mounted in the block.
-35 or 50 mm heaters: 50mm seems to have the best and lowest position in the block, 35 aint there, 30 is.
-place of the heater:lower seems better, warm water seems to go up, ideally you get a flow.
-The block draining plugs are mentioned to be fitted with a heater.
-more things to consider?
Other plugs for sale and dimensions:
11116A PLUG, TIGHT, NO.1
96411‑42000 2H..HJ60, OD=20 3 € 3.29
11116B PLUG, TIGHT, NO.2
96411‑42500 12HT, 2H..HJ6*, OD=25 6 € 4.34
11116C PLUG, TIGHT, NO.3
96411‑43000 12HT, 2H..HJ6*, OD=30 12 € 5.01
11116D PLUG, TIGHT, NO.4
96411‑45000 12HT, 2H..HJ6*, OD=50 1 € 5.15
30 mm freeze plug, below glowplug, behind edic, before firewall, number 6 :
-need to make some kind of puller to get it out EDIT:slam with a punch and it will turn, grab with pliers and pull out, can be reused for emergency.
-have to find a way to slam it in without damage, the manual does not mention any type of sealant/stuff. EDIT: just take the brass drift used for the knuckle and gently tap it in, after every tap go to the other side.
-Maybe the 30 mm installation is a lot easier then those poor souls with an 50 mm
50 mm plug rear 96411‑45000 PLUG, TIGHT, seems impossible, or maybe you have time to remove the engine:
Maybe the radiator side is possible? it has been done, but you might also have to move the mont blanc.
This 30 or 50 mm thing is the same as knuckle repacking with special holy water absorbing-expelling grease that only exists in mad peoples minds, 50 mm seems best

EDIT: 50 mm seems impossible to install on the lower freeze-plug on cabin side. Engine has to be removed! (?)
https://forum.ih8mud.com/60-series-wagons/564438-need-block-heater-part.html
So part two was installing the cable properly, took me more time than the installation of the heater.
Installation in the grill: