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Old 09-10-2004, 03:06 AM   #1
hirevn
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Member#: 60956
Join Date: May 2004
Location: palmer,ak
Vehicle:
04 sti
blue/gold

Default block heater install info.

has anyone installed there own block heater?id like to get one on soon but dont want to go to the dealer.any info on installtion would be great.the heater looks like it just screws in to the block,but where?
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Old 09-10-2004, 03:25 AM   #2
soldmyboxster
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Join Date: Jul 2004
Chapter/Region: International
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I installed my OEM heater about a month ago. It screws into the bottom of the block very close to the lower radiator hose inlet and the left exhaust manifold.

The plug is installed pretty tight and requires a 14mm allen wrench to remove (not exactly a common tool). I special ordered my allen wrench from a tool store. Once out, all the coolant comes pouring out. The block heater screws into place and comes with a factory paper gasket. Torque it tight with a 27mm socket and you can add coolant. Plug in the supplied harness and route the plug pretty much anywhere, it's about 3 ft. long.
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Old 09-10-2004, 03:39 AM   #3
hirevn
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blue/gold

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sweet,thanks man.im a tech for a living( not autos) so im lucky enough to have a full set of snapon allen sockets up to 17mm and wrenchs to 19mm.is the plug buried or fairly easy to get at?
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Old 09-10-2004, 03:48 AM   #4
00Maddog
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Join Date: May 2004
Chapter/Region: AKIC
Location: its bristol baby
Vehicle:
2004 wrx w/o engine
psm/carbon

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i have the tools if you want to borrow them hirevn
they have been used for at least 50 heaters!

as previously said, the plug is friggen tight! note- don't make the block heater that tight!! just snug it up.

since we're talking about subie block heaters, N/A's are easy, you can get a straight shot at the plug as nothing is near. If done quickly only a small amount of coolant is lost. Turbos on the other hand, with their forward exit manifolds, suck arse especially if they're hot, first one I did I ended up loosing most of the coolant before I got the heater threaded. coolant sucks. btw even though it sounds crazy (wet surfaces are usually bad for rtv) apply a bead of black or grey rtv around the heater threads to prevent leaks.
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Old 09-10-2004, 03:57 AM   #5
hirevn
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04 sti
blue/gold

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thanks for the tips.my 2 most hated enemys,antifreeze and brake fluid.im sure ill have the right tools needed,what do you use?if theres something special i have all three mac,matco and snappy come to my shop every week so i can get anything but i have short allen sockets and wrenchs that size.the only one i dont have is the long balled end style that big.
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Old 09-10-2004, 04:25 AM   #6
00Maddog
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2004 wrx w/o engine
psm/carbon

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well, since you have a shop, get your heater ready with gasket and small bead of rtv around the gasket, put it in a 1 1/16 regular depth socket (easier to find than 27mm, but both work) then either adapt to 3/8 for a 6" to 8" 3/8 extension or ideally use a 1/2 inch torque stick (because it's thin and hugs the manifold so the threads will start straight) and of course a ratchet, which remains in your pocket for later. Then use a half-inch impact + 6 to 8 inch extension with 14mm allen socket to loosten the bastard plug, then get ready for the quick switch (i should say to undo the radiator cap so the coolant isn't under pressure). with one hand unscrew the plug all the way still holding it in the hole, then quickly move aside and shove the heater in the hole and start twisting until you feel the threads engage. ratchets in your pocket, you know the rest. If done fast enough you won't have to add any coolant!

p.s. i have never done this on the ground so if its ten times harder don't blame me! hopefully your shop has a lift, but I haven't seen many sled shops with car lifts lol.

edit if you buy a subie heater it comes with a nice cord with all the clips already attached and instructions showing where to attach each clip so the cord stays put. well worth the money even if the instructions are foreign.
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Old 09-10-2004, 04:33 AM   #7
hirevn
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04 sti
blue/gold

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nope,no lifts that a car will sit on anyway.itll be on jackstands in my driveway,sounds like ill make alittle mess.thanks though,ill remember the 1/2 impact,tight as all hell it sounds like.
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Old 09-10-2004, 04:35 AM   #8
00Maddog
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2004 wrx w/o engine
psm/carbon

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the plug has sealant on it i think thats the problem, but an impact makes it easy.
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Old 02-24-2019, 10:39 PM   #9
GGA EJ20
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Anyone have a part number for a 2007 2.5i block heater? Need to do a coolant flush anyway, so I figured this would be the time to install it..
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Old 02-26-2019, 02:11 AM   #10
JCharron2005
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Chapter/Region: AKIC
Location: Anchorage, Alaska
Vehicle:
1993 Impreza L AWD
ABM

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