Block Heater (Frost Plug)Location - Subaru Outback - Subaru Outback Forums

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Old 03-16-2008, 11:21 AM   #1 (permalink)
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Default Block Heter (Frost Plug)Location

I have a 2004 Outback H6. I live in a Climate that at times can get as low as -40 degrees celcius, so I want a block heater. My problem is that all the information that I find on installing a block heater(by taking out the frost plug) is for the drivers side of the engine and when I crawl under my car the only frost plug I can find is the one right next to oil filter. Where is the other one, can I use this frost plug or will it damage something, Is the location of the frost plug different on the 3.0L than the smaller engines?
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Old 03-30-2008, 02:57 AM   #2 (permalink)
rcy
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On the H6, it's not actually a frost plug but the drain plug for the block. I installed the block heater on my 2001 H6, and it IS the plug near the oil filter. You need a really weird sized allen key socket (14mm I think, or maybe 17mm) to remove the plug. Don't bother draining the rad, and the block like the instructions say, just loosen the drain plug till it's almost all the way out, have the block heater handy in your other hand, and quickly swap one for the other. I did this and lost hardly any coolant - not even enough to require a top up. This way you don't have to worry about refilling the engine with coolant, as I hear it can be a pain - and if you leave an air bubble, you can really mess things up.
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Old 04-22-2008, 12:47 AM   #3 (permalink)
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I am planning to get a block heater for my 04 with the 2.5 engine. I did notice a strange allen sized bolt on the block when I went to change my oil. I would assume the 3.0 is similar in design. The one at subarupartsmall.com has a threaded end:


Is that what it looked like on the H6?


-Kevin
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Old 04-22-2008, 01:40 AM   #4 (permalink)
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I installed the block heater on my '97 Outback 2.5, and I don't believe much has changed in the newer engine.

Thats what it looked like. Make sure to have the 14mm hex bit. Try to get the one which you can put on your rachet with an extension, because there isn't much space to fit an allen key in there. I used an allen key, but had to turn it with a couple crescent wrenches on the long end.

On a similar note, make sure to have a big enough socket to tighten down the heater, and hi-temp thread stuff.

Check out this link http://www.subaruparts.com/catalog/s...lockheater.pdf for instructions to install on the 2.5.

Jeff
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