Engineering is yet another primary crafting profession that can create many cool, useful and amazing items. The highlight of WotLK for Engineering is none other than the ultra expensive motorcycle land mount. Another personal favorite of mine is the Noise Machine for spell casters or in my case... my mage which helps a lot during AoE farming.

Alrighty, let us have a look at where the trainers are for Engineering:

Alliance:
Sock Brightbolt - 57,72 in Valiance Keep, Borean Tundra.
Tisha Longbridge - 59,64 in Valgarde, Howling Fjord.

Horde:
Jamesina Watterly - 78,30 in Vengence Landing, Howling Fjord.

Neutral:
Justin Oshenko - 35,25 in Dalaran.
Findle Whistlesteam (Gnome Engineering) - 39,25 in Dalaran.
Didi the Wrench (Goblin Engineering) - 39,25 in Dalaran.


Here is the powerleveling guide for Engineering 375 to 450. Kindly note that some of the steps might be overlapping, so use the one which you have mats for or can be bought cheaply from the auction house:

375-385
Overcharged Capacitor - 4 Cobalt Bar, 1 Crystallized Earth.

385-390
Explosive Decoy – 1 Frostweave Cloth, 3 Volatile Blasting Trigger

390-400
Nitro Boots – 6 Volatile Blasting Trigger, 6 Handful of Cobalt Bolts

400-405
Diamond-Cut Refractor Scope – 2 Handful of Cobalt Bolts , 1 Froststell Tube

405-415
Saronite Bomb - 5 Saronite Bar, 1 Volatile Blasting Trigger

415-420
Mana Injector Kit - 12 Saronite Bar, 2 Crystallized Water

420-430
Mechanized Snow Googles - 8 Saronite bar, 2 Borean Leather, 1 Eternal shadow

430-435
Noise Machine - 2 Froststell Tube, 2 Overcharged Capacitor, 8 Handful of Cobalt Bolts

435-450
Gnomish Army Knife – 10 Saronite Bar, Skinning knife, Mining Pick, Blacksmith Hammer

440-450
Armored Titanium Googles – 8 Titanium Bar, 4 Heavy Borean Leather, 2 Sky Sapphire, 4 Eternal Earth, 1 Frozen Orb