World of Warcraft Engineering Profession Guide
Engineering is a "fun" tradeskill of WoW. It allows players to make a bunch of different gadjets and toys for you to pla around with. Not all of these toys are useless, some are actually very powerful. The only downside to that is a lot of them have the ability to backfire onto the caster, dealing damage or even reversing the effect.
As an Engineer you won't have much of a direct effect on the out come of the game, since everything you can make is more of a leisure. However, a lot of the times its great to have Engineering, say your group wipes and you get out alive. Bust out them Goblin Jumper cables and try to ressurect your healer.
Engineering Paths
Goblin Engineer: Allows an engineer to make lethal goblin devices.
In order to become a Goblin Engineer you must grab the quest from Graham Van Talen in Undercity (Horde) or Lilliam Sparkspindle in Stormwind (Alliance).
Both factions have to take this quest to Nixx Sprocketspring in Gadgetzan. After you turn the quest in he will ask you to sign his pledge. Sign the Pledge of Secrecy and turn it back in. Accept the next quest and now you will get a quest to show your work. For this quest you need the following;
Big Iron Bombs x 20
Solid Dynamite x 20
Explosive Sheep x 5
After you complete this quest you will be awarded with the Goblin Engineering Membership Card which is needed to train from any of the Goblin Engineering Trainers.
Gnomish Engineer: Allows an engineer to make fantastic, yet unreliable gnomish devices.
In order to become a Gnomish Engineer you must grab the quest from Graham Van Talen in Undercity (Horde) or Lilliam Sparkspindle in Stormwind (Alliance).
For Alliance you have to turn the quest into Tinkmaster Overspark in Ironforge. Sign the Pledge of Secrecy and turn it back in. Accept the next quest and now you will get a quest to show your work. You need the following;
Mithril Tubes x 6
Accurate Scope x 1
Advanced Target Dummy x 2
After you complete this quest you will be rewarded with the Gnomish Engineering Membership Card which is needed to train from any of the Goblin Engineering Trainers.
For Horde you have to turn your quest into Oglethorpe Obnoticus in Booty Bay. Sign the Pledge of Secrecy and turn it back in. Now you will get a quest to show your work. You need the following;
Mithril Tubes x 6
Accurate Scope x 1
Advanced Target Dummy x 2
After you complete this quest you will be rewarded with the Gnomish Engineering Membership Card which can be used to train from all the trainers.
Raising Engineering 1 - 75
Engineering 1 - 30
Craft - 
[Rough Blasting Powder] x 40
Materials Required:
40 Rough Stone
Engineering 30 - 50
(Save these for later)
Craft - 
[Handful of Copper Bolts] x 34
Materials Required:
34 Copper Bars
Engineering 50 - 51
(Do not vendor this item!)
Craft - 
[Arclight Spanner] x 1
Materials Required:
6 Copper Bars
Engineering 51 - 75
Craft - 
[Copper Tube] x 24
Materials Required:
48 Copper Bars
24 Weak Flux
Engineering 75 - 150
Engineering 75 - 85
Craft - 
[Coarse Blasting Powder] x 15
Materials Required:
15 Coarse Stone
Engineering 85 - 90
Craft - [Coarse Dynamite] x 5
Materials Required:
15 Coarse Blasting Powder
15 Linen Cloth
Engineering 90 - 100
Craft - 
[Copper Modulator] x 12
Materials Required:
24 Handfuls of Copper Bolts
12 Copper Bars
24 Linen Cloth
Engineering 100 - 105
Craft - 
[Practice Lock] x 5
Materials Required:
10 Handfuls of Copper Bolts
5 Bronze Bars
5 Weak Flux
Engineering 105 - 120
Craft - 
[Bronze Tubes] x 17
Materials Required:
34 Bronze Bars
17 Weak Flux
Engineering 120 - 125
Craft - 
[Standard Scope] x 5
Materials Required:
5 Bronze Tubes
5 Moss Agate
Engineering 125 - 150
Craft - 
[Heavy Blasting Powder] x 40
Materials Required:
40 Heavy Stone
+
Craft - 
[Whirring Bronze Gizmo] x 20
Materials Required:
40 Bronze Bars
20 Wool Cloth
Engineering 150 - 160
Craft - 
[Bronze Framework] x 20
Materials Required:
40 Bronze Bars
20 Medium Leather
20 Wool Cloth
Engineering 160 - 175
Craft - [Explosive Sheep] x 20
Materials Required:
40 Heavy Blasting Powder
20 Whirring Bronze Gizmo
20 Bronze Framework
40 Wool Cloth
Engineering 175 - 250
Engineering 175 - 176
Don't vendor this item, you will need it for later.
Craft - 
[Gyromatic Micro-Adjuster] x 1
Materials Required:
4 Steel Bars
Engineering 176 - 195
Save this for later use.
Craft - 
[Solid Blasting Powder] x 90
Materials Required:
180 Solid Stone
Engineering 195 - 200
Craft - [Mithril Tubes] x 5
Materials Required:
36 Mithril Bars
Engineering 200 - 216
Save these items
Craft - 
[Unstable Triggers] x 20
Materials Required:
20 Mithril Bars
20 Mageweave Cloth
20 Solid Blasting Powder
Engineering 215 - 238
Save these for later
Craft - 
[Mithril Casing] x 40
Materials Required:
120 Mithril Bars
Engineering 238 - 250
Craft - 
[Hi-Explosive Bomb] - x 20
Materials Required:
40 Mithril Casings
20 Unstable Triggers
40 Solid Blasting Powder
Engineering 250 - 350
Engineering 250 - 260
Save these and make sure you make these until you reach 260
Craft - 
[Dense Blasting Powder] x 20
Materials Required:
40 Dense Stone
Engineering 260 - 280
Craft - 
[Thorium Widget] x 21
Materials Required:
63 Thorium Bars
21 Runecloth
Engineering 281 - 300
Craft - 
[Thorium Tube] x 21
Materials Required:
126 Thorium Bars
Enginering 300 - 310
Save these.
Craft - 
[Handful of Fel Iron Bolts] x 50
Materials Required:
50 Fel Iron Bars
Engineering 310 - 320
Craft - 
[Elemental Blasting Powder] x 10
Materials Required:
20 Motes of Earth
10 Motes of Fire
+
[Fel Iron Casing] x 15
Materials Required:
Craft - 45 Fel Iron Bars
Engineering 320 - 325
Craft - 
[Fel Iron Musket] x 5
Materials Required:
5 Heavy Stock
15 Fel Iron Casing
30 Handfuls of Fel Iron Bolts
Engineering 325 - 335
Craft - 
x10 [Adamantite Grenade]
Materials Required:
40 Adamantite Bars
10 Elemental Blasting Powder
20 Handful of Fel Iron Bolts
Engineering 335 - 350
To see locations to buy this recipe click here.
Craft - 
[White Smoke Flare] x 30
Materials Required:
30 Netherweave Cloth
30 Elemental Blasting Powder
Engineering 350 - 450
Engineering 350 - 375
Save these for later use
Craft - 
[Handful of Cobalt Bolts] x 35
Materials Required:
70 Cobalt Bars
Engineering 375 - 380
Save these for later use
Craft - 
[Volatile Blasting Trigger] x 18
Materials Required:
54 Cobalt Bars
18 Crystallized Water
Engineering 380 - 385
Save these as well
Craft - 
[Overcharged Capacitor] x 10
Materials Required:
40 Cobalt Bars
10 Crystallized Earth
Engineering 385 - 390
Craft - 
[Explosive Decoy] x 8
Materials Required:
8 Frostweave Cloth
24 Volatile Blasting Trigger
Engineering 390 - 400
Save these
Craft - 
[Froststeel Tube] x 15
Materials Required:
120 Cobalt Bars
15 Crystallized Water
Engineering 400 - 405
Craft - 
[Diamond-cut Refractor Scope] x 5
Materials Required:
5 Froststeel Tube
10 Handfuls of Cobalt Bolts
Engineering 405 - 415
Craft - 
[Box of Bombs] x 13
Materials Required:
65 Saronite Bars
13 Volatile Blasting Triggers
Engineering 415 - 420
Sell these at the AH to make some of your gold back
Craft - 
[Mana Injector Kit] x 5
Materials Required:
60 Saronite Bars
10 Crystallized Water
Engineering 420 - 425
Craft - 
[Noise Machine] x 5
Materials Required:
10 Froststeel Tubes
10 Overcharged Capacitor
40 Handful of Cobalt Bolts
Engineering 425 - 525
Engineering 425 - 442
Craft - 
[Handful of Obsidium Bolts] x 20
Materials Required:
40 Obsidium Bars
Engineering 442 - 445
Craft - 
[Electrostatic Condenser]
Materials Required:
4 Obsidium Bars
6 Handful of Obsidium Bolts
4 Volatile Earth
Engineering 445 - 460
Craft - 
[Electrified Ether] x 17
Materials Required:
34 Volatile Air
Engineering 460 - 470
Craft - 
[R19 Threatfinder] x 2
Materials Required:
12 Obsidium Bars
4 Alicite
12 Handful of Obsidium Bolts
Engineering 470 - 475
Craft - 
[High-Powered Bolt Gun] x 1
Materials Required:
10 Obsidium Bars
8 Handful of Obsidium Bolts
4 Electrified Ether
Engineering 475 - 495
Craft - 
[Elementium Toolbox] x 4
Materials Required:
60 Elementium Bars
48 Volatile Earth
Engineering 495 - 510
Craft - 
[Finely-Tuned Throat Needler] x 3
Materials Required:
6 Electrified Ether
12 Obsidium Bars
15 Hardened Elementium Bars
Engineering 510 - 521
Craft - 
[Heat-Treated Spinning Lure] x 12
Materials Required:
12 Handful of Obsidium Bolts
48 Elementium Bars
12 Volatile Fire
Engineering 521 - 525
Craft - 
[Gnomish X-Ray Scope] x 1
Materials Required:
2 Hardened Elementium Bars
2 Dream Emerald
Choosing a Second Profession
Choosing a second profession with Engineering is rather simple, you can grab mining and make your life a breeze. Or grab another crafting profession and make your life an absolute living hell. Of course your second option is Enchanting, my personal favorite. Enchanting will allow you to not have to look for an Enchanter to enchant your gear. And of course... Ring Enchants!!!
Special Perks to Engineering
Engineering's Special Perk is the ability to make Helicopter Flying Mounts, Motorcycles and a bunch of other cool Gagets. The types of gadgets that you can make as an Engineer are movement speed increasing boots, nets to root people, a trinket to ressurect people. A machine to collect fart clouds, that of course contain essences!
Profiting off Engineering
Engineering is a difficult profession to profit off of. The only two viable things you can profit off of are the Mechano-Hogs and Mekgineer Chopper. Players will want both of these mounts for their looks and the achievement that comes with them. If your alliance, you will also be able to make items used for a quest out in Borean Tundra.