Engineering Leveling Guide 1 - 450

First, visit any trainer in the main cities of old Azeroth - just ask a guard, and learn Apprentice Engineering. Northrend trainers can also teach you every recipe from 1 to 450.

1 - 30
40 x [Rough Blasting Powder] - 40 Rough Stone
This recipe goes yellow at 20, so get enough materials to use this recipe 40 times.

30 - 50
34 x [Handful of Copper Bolts] - 34 Copper Bar
You will need 34 of these later.

50 - 125
Visit your trainer, and learn Journeyman Engineering.

50 - 51
1 x [Arclight Spanner] - 6 Copper Bar

51 - 75
24 x [Copper Tube] - 48 Copper bar, 24 Weak Flux

75 - 85
15 x [Coarse Blasting Powder] - 15 Coarse Stone
You will need 15 of these later.

85 - 90
5 x [Coarse Dynamite] - 15 Coarse Blasting Powder, 5 Linen Cloth

90 -100
12 x [Copper Modulator] - 24 Handful Copper Bolts, 12 Copper Bar, 24 Linen Cloth

100 -105
5 x [Practice Lock] - 10 Handful Copper Bolts, 5 Bronze Bar, 5 Weak flux

105 -120
17 x [Bronze Tubes] - 34 Bronze Bar, 17 Weak Flux

120 -125
5 x [Standard Scope] - 5 Bronze Tube, 5 Moss Agate

125 - 205
Visit your trainer, and learn Expert Engineering.

125 -150
40 x [Heavy Blasting Powder] - 40 Heavy Stone
and

20 x [Whirring Bronze Gizmo] - 40 Bronze Bar, 20 Wool Cloth

You will need 40 [Heavy Blasting Powder] and 20 [Whirring Bronze Gizmo] later, and if you make these you should reach 150 skill point.

150 - 155
20 x [Bronze Framework] - 40 Bronze Bar, 20 Medium Leather, 20 Wool Cloth
by making them now, you might get a lot further - probably towards 160, then stop making these and only make more when you'll need them.

155 -175
20 x [Explosive Sheep] - 40 Heavy Blasting Powder, 20 Whirring Bronze Gizmo, 20 Bronze Framework, 40 Wool Cloth

175 - 176
The recipe will be yellow, so you might not gain any skill up, but you will need this item later. You will have to make only one of this, don't make more if you don't gain skill up.

1 x [Gyromatic Micro-Adjustor] - 4 Steel Bar

176 - 195
90 x [Solid Blasting Powder] - 180 Solid Stone
Extremely cheap! On my realm it costs 1 gold/stack. Save some of these, because you will need it later.

195 - 200
7 x [Mithril Tubes] - 21 Mithril Bar

205 - 280
Visit your trainer and learn Artisan Engineering.

Engineering has the option at skill level 200 to specialize in Gnomish or Goblin Engineering. The main difference between both sides is the location of their respective teleporters and the ability of their trinkets. Some items require a specific specialization to use, while other items are crafted by one specialization but are usable by any engineer. Fortunately, most recipes that are crafted by one Specialization can be worn by both.

Gnomish Engineering

List of Recipes
Goblin Engineering

list of recipes

200 - 210
12 x [Unstable Triggers] 12 Mithril Bar, 12 Mageweave Cloth, 12 Solid Blasting Powder
Save these.

210 - 225
17 x [Hi-Impact Mithril Slugs] - 17 Mithril Bar, 17 Solid Blasting Powder

225 - 235
20 x [Mithril Casings] - 60 Mithril Bar
Save these.

235 - 245
10 x [Hi-Explosive Bomb] - 20 Mithril Casings, 10 Unstable Trigger, 20 Solid Blasting Powder

245 - 250
7 x [Mithril Gyro-Shot] - 14 Mithril Bar, 14 Solid Blasting Powder

250 - 260
20 x [Dense Blasting Powder] - 40 Dense Stone
Save these and if you don't reach 260 by making these, make a few more [Mithril Gyro-Shot].

260 - 280
20 x [Thorium Widget] - 60 Thorium Bar, 20 Runecloth

280 - 350
Go to Outland or Northrend,visit your trainer, and learn Master Engineering

.

280 - 285
5 x [Thorium Tube] - 30 Thorium Bar

285 - 300
20 x [Thorium Shells] - 40 Thorium Bar, 20 Dense Blasting Powder

300 - 310
50 x [Handful of Fel Iron Bolts] - 50 Fel Iron Bar

310-320
If you don't reach 320 by making the recipes below, you should make [Fel Iron Bombs] until 320. But then you also need to make a few more Fel Iron Bolts and the other materials.
10 x [4 Elemental Blasting Powder] - 20 Mote of Earth, 10 Mote of Fire

Save these.

15 x [Fel Iron Casing] - 45 Fel Iron Bar

You will need around 15 of these later, but I suggest you to make these until it goes grey, then only make more when you'll need them.

320 - 325
5 x [Fel Iron Musket] - 5 Heavy Stock, 15 Fel Iron Casing, 30 Handful of Fel Iron Bolts

325 - 335
10 x [Adamantite Grenade] 40 Adamantite Bar, 10 Elemental Blasting Powder, 20 Handful of Fel Iron Bolts

335 - 350
30 x [White Smoke Flare] - 30 Netherweave Cloth, 30 Elemental Blasting Powder
Recipe location

350 - 450
Go to Northrend, visit your trainer and learn Grand Master Engineering.

350 - 370
You will need around 50 [Handful of Cobalt Bolts] and 36 [Volatile Blasting Trigger] later. Make these now, and you should reach 375 or probably more. Note that when you craft [Handful of Cobalt Bolts] you can get 1 or 3 bolts, and the same goes for [Volatile Blasting Trigger], you will get 2 [Volatile Blasting Trigger] each craft.

35 x [1-3 Handful of Cobalt Bolts] - 70 Cobalt Bar

370 - 377
Save these.
18 x [2 Volatile Blasting Trigger] - 54 Cobalt Bar, 18 Crystallized Water

377 - 385
Save these too, you will need them.
10 x [Overcharged Capacitor] - 40 Cobalt Bar, 10 Crystallized Earth

385 - 390
8 x [Explosive Decoy] - 8 Frostweave Cloth, 24 Volatile Blasting Trigger

390 - 400
Save these too, you will need them later.
You will probably reach more than 400, then stop making these and make more only if you need it.

15 x [Froststeel Tube] - 120 Cobalt Bar, 15 Crystallized Water

400 - 405
5 x [Diamond-cut Refractor Scope] - 5 Froststeel Tube, 10 Handful of Cobalt Bolts

405 - 410
5 x [Box of Bombs] - 25 Saronite Bar, 5 Volatile Blasting Trigge

410 - 415
15 x [Mammoth Cutters] - 15 Saronite Bar, 15 Volatile Blasting Trigger

415 - 425
25 x [Saronite Razorheads] - 50 Saronite Bar

425 - 430
Make [Global Thermal Sapper Charge] between 425-435, if you are a Goblin Engineer.

7 x [Mechanized Snow Goggles] - 56 Saronite Bar, 14 Borean Leather, 7 Eternal Shadow

430 - 435
5 x [Noise Machine] - 10 Froststeel Tube, 10 Overcharged Capacitor, 40 Handful of Cobalt Bolts
435 - 449
When you reach 435, you can make your [Wormhole Generator: Northrend] and your epic Engineering Helm at 440, however if you want to level your Engineering past 440, you should wait with both until 448, because there are only green recipes at that point, but the Goggles and the [Wormhole Generator: Northrend] are still orange.

You will probably need to make more than 25 of these.

25 x [Gnomish Army Knife] - 250 Saronite Bar, 25 Skinning Knife, 25 Minning Pick, 25 Blacksmithing Hammer

449 - 450
1 x [Wormhole Generator: Northrend] - 8 Titanium Bar, 2 Eternal Fire, 2 Eternal Shadow, 2 Eternal Water, 2 Eternal Air

I hope you liked this Engineering leveling guide, GZ to 450!

Source: http://www.wowhead.com/forums&topic=160512/wow-engineering-guide-1-450