1996 Subaru Outback Hex Key Size

Tiny
BORI1
  • MEMBER
  • 1996 SUBARU OUTBACK
  • 4 CYL
  • AWD
  • AUTOMATIC
  • 229,000 MILES
I'm looking to drain the coolant from the engine block of my 96 Subaru Legacy Outback, 2.5 engine. There are two drain plugs on either side of the oil pan that take a particularly large hex key. I don't own one, and I'm trying to get one, but don't know the size. Any clues?
Also, do you know the torque specification for the PCV on same vehicle? I accidentally cracked my intake manifold and am having to replace it; don't want to do it again.
Thanks!
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Wednesday, July 28th, 2010 AT 10:18 AM

7 Replies

Tiny
MERLIN2021
  • EXPERT
Don't mess with those, the block drain is a draincock at the back of the engine as shown here:


http://www.2carpros.com/forum/automotive_pictures/62217_drain_engine_1.jpg


DRAINING & REFILLING COOLING SYSTEM 1. Lift vehicle. 2. Fit vinyl tube to drain pipe. See Fig. 12 . Fig. 12: Draining Engine Coolant Courtesy of SUBARU OF AMERICA, INC. 3. Remove radiator cap to drain engine coolant faster. Loosen drain cock to drain engine coolant into a container. 4. Remove air vent plug from radiator. See Fig. 13 . Fig. 13: Filling Engine Coolant Courtesy of SUBARU OF AMERICA, INC. 5. Fill engine coolant up to filler neck position of radiator. 6. Fill engine coolant to upper level (full line) of reservoir tank. 7. Close both the radiator cap and the reservoir tank cap properly. 8. Reinstall air vent plug. 9. Run engine for more than five minutes at 2000 to 3000 RPM, until engine is completely warm. 10. Stop engine. Before inspecting fluids, allow temperature to drop to a safe level and perform the following procedure: Add engine coolant to filler neck position if levels have dropped in the radiator. Add engine coolant to upper level (full line) if levels have dropped in the reservoir tank. Close both the radiator cap and the reservoir tank cap properly.
as far as the EGR torque, no more than 44 inch lbs, but just snug it evenly, people break em when they tighten one side then the other, finger tighten both then just snug each one a bit more with the wrench EVENLY!
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Thursday, July 29th, 2010 AT 3:22 PM
Tiny
BORI1
  • MEMBER
Thanks for your reply, but it was the PCV not EGR I was asking torque specs for. Can you let me know?

Also, regarding the coolant, I'm changing the intake manifold, and per the Hanes manual I'm working off of, it directs me to follow the engine coolant change instructions, which is to drain the radiator (what you gave me instructions for) AND the engine block, by removing the two hex caps I mentioned. Why would you say not to mess with them?

Thanks for your help!
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Friday, July 30th, 2010 AT 8:03 AM
Tiny
MERLIN2021
  • EXPERT
44 inch lbs is the max torque for any part bolted to the aluminum manifold. All you need to do is snug it until no vacuum leaks out. I will investigate the hex caps further, get right back.
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Friday, July 30th, 2010 AT 9:20 AM
Tiny
MERLIN2021
  • EXPERT
Here's what Mitchell shows for the job:
INTAKE MANIFOLD Removal 1. Release fuel pressure. See FUEL PRESSURE RELEASE. Disconnect battery negative cable. Drain engine coolant. Remove air intake/upper air cleaner cover assembly. Disconnect accelerator cable. Disconnect cruise control cable (if equipped). 2. Remove accessory drive belt cover and belts. Remove power steering pump with hoses attached and set aside. Remove generator and bracket. Disconnect PCV, EVAP and brake booster hoses. Disconnect spark plug wires. Disconnect coolant hoses from throttle body and idle air control valve. 3. Remove EGR pipe. Remove engine wire harness connectors and bracket. Disconnect electrical connectors from coolant temperature sensor, knock sensor, camshaft/crankshaft position sensors and oil pressure switch. Disconnect fuel hoses from pipes. Remove intake manifold. Installation To install, reverse removal procedure. Use NEW gaskets. Tighten all bolts/nuts to specification. See TORQUE SPECIFICATIONS.
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Friday, July 30th, 2010 AT 9:29 AM
Tiny
MERLIN2021
  • EXPERT
After a quick call to Sub service the size wrench is 14 mm hex.
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Friday, July 30th, 2010 AT 9:36 AM
Tiny
BORI1
  • MEMBER
Thanks for everything, Merlin2021! Wish me luck.
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Friday, July 30th, 2010 AT 10:26 AM
Tiny
MERLIN2021
  • EXPERT
If you need any thing just call! Good luck and hone those skills!
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Friday, July 30th, 2010 AT 11:49 AM

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