Use a 50mm holding tool and a couple of breaker bars. I have a 1991 Honda CRX HF and it does not have an internal 50mm hex for the holding tool. Why is this so?
I'm not sure why it doesn't have the 50mm hex, but what we did to both tighten and loosen the bolt on my 1991 Accord is put the car into gear (5th for 5 speed manuals) and have someone step on the brake. Also put on the parking brake. Then using a big breaker bar and a few extenders put pressure on the bolt. Use a jackstand to support the extenders. It's going to take a decent amount of effort so stay with it. Honda torques those bolts to 300 foot-lbs. PB Lube or WD-40 help a lot. And if you break the bolt it's a 14x1.25mm bolt that's about 2in long. Honda sells them for $20 or so, so don't break it.
Counterclockwise. Skweekah
No it is not.
Loosen the 18mm bolt about 4 or 5 mm and give the bolt a good wack and the pulley should pop. Then remove the bolt and pulley.
It comes off like a normal bolt, counter clockwise. You will need to rent a special tool to hold the crank pulley still while you loosen the bolt. It is on very tight.
Most Mazdas are counterclockwise to loosen it... Lefty loosey, righty tighty.. Careful, some years have locktite on them..
loosen the bolt in the center of the drive belt pulley, then loosen the bolt on the side of the pulley. as you loosen the side bolt the tension lets up
Remove right front wheel (passenger side) Remove plastic shield behind (3 bolts) Loosen alternator and remove belt (loosen lower through bolt, loosen upper through bolt, turn tightening bolt on firewall side counter-clockwise to loosen belt) Loosen power steering pump and remove belt. Remove crankshaft pulley bolt in center (probably need a breaker bar, prevent crank from spinning by putting a screwdriver in flywheel teeth at transmission end) Use pulley removal tool to pull pulley off straight (http://www.justoffbase.co.uk/Crankshaft-Pulley-Removal-Tool-Set-13pc-Sealey-PS997) installation reverse. (note key-way in pulley and key on crank)
Loosen the 15mm nut that holds the pulley to the bracket then back off on the 13mm adjuster bolt.
LEFT! Surprisingly the bolt is a normal right-handed thread
Loosen bolt in tension pulley, then loosen tension bolt. Replace belt. Tighten tension bolt. Last, tighten bolt through pulley.
disconnect the battery, remove the bolt in the center of the pulley, then use a harmonic balancer tool to remove it
Two Words------IMPACT WRENCH