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Car Forum / Honda Cars / February 2005Honda Crankshaft pulley falls off
I just replaced the crabkshaft pulley on my 1999 Accord for the SECOND time after it fell off while driving the car. The first time it fell off at 65K miles. I bought the car new, did all the required maintenance myself, and had NEVER touched that assembly. I had to replace the pulley and the key as it destroyed both. Lucky for me the crank appeard to be in OK shape. I torqued the *@%$ out of it with a 1100 ft/lb 3/4" pnematic impact wrench and thought I was "done". I thought I was done with it, but, 20 months later (yesterday), it happended again. This time I used super high stength locktite and replaced the bolt as well. However, I am nervous something else is wrong and that this will keep happening. I had some questions I was hoping someone could help me with: * Has anybody ever heard of this problem? * Does anyone know how far the snout of the crankshaft is supposed to be recessed relative to the solder on the crankshaft pulley that the bolt sits on (when fully seated)? I have an 1/8 gap there when the pulley is fully seated and am wondering if this is the problem. * Is the crankshaft supposed to be splined? There are splines in the pulley and I am wondering if there are supposed to be mating splines in the crankshaft that were stripped off by the loose pulley. Any advice is appreciated. -Jeff That should have read "shoulder on the crankshaft pulley", not solder! > I just replaced the crabkshaft pulley on my 1999 Accord for the SECOND time > after it fell off while driving the car. The first time it fell off at 65K [quoted text clipped - 25 lines] > > -Jeff It's a honda. There's your problem. Quality Last, Profits first -- shitty civics switched to cheap front struts from double wishbone. Huge downgrade... If so, why you wasting your time here? You some kind of dip? > > I just replaced the crabkshaft pulley on my 1999 Accord for the > SECOND time [quoted text clipped - 41 lines] > Quality Last, Profits first -- shitty civics switched to cheap front > struts from double wishbone. Huge downgrade... -- Tp, -------- __o ----- -\<. -------- __o --- ( )/ ( ) ---- -\<. -------------------- ( )/ ( ) ----------------------------------------- No Lawsuit Ever Fixed A Moron... > I just replaced the crabkshaft pulley on my 1999 Accord for the SECOND time > after it fell off while driving the car. The first time it fell off at 65K [quoted text clipped - 12 lines] > > * Has anybody ever heard of this problem? i've seen it, but only when there's been a maintenance problem. fwiw, it's extroardinarily improbable that the pulley & the key can be damaged without damaging the crank - the key has to be caught between two parts to damage it, & one of those parts is the crank. usually, crank steel is softer than key steel. > * Does anyone know how far the snout of the crankshaft is supposed to be > recessed relative to the solder on the crankshaft pulley that the bolt > sits on (when fully seated)? I have an 1/8 gap there when the pulley is > fully seated and am wondering if this is the problem. you mean the crank appears to be "too short" or it's "too long"? if it's too short, that's normal. if it's too long, the toothed belt cog has been put on the wrong way round. hard to do because it's keyed, but possible. > * Is the crankshaft supposed to be splined? There are splines in the > pulley and I am wondering if there are supposed to be mating splines in > the crankshaft that were stripped off by the loose pulley. the crank's splined for the toothed belt cog & keyed for the pulley wheel. if you don't put in the key, the pulley wheel should spin free. > Any advice is appreciated. > > -Jeff if the pulley holds after your loctite application, you're set until the belt's due for replacement. after that, you'll [not] have fun getting it off again. don't even bother trying to do anything until you've had the heat torch on there to soften that stuff up. loctite should not be used in this situation. if the bolt's not holding, it's because there's a fault which needs to be remedied. heating will cook the oil seal, probably the end bearing & ruin any temper in the crank. it'll definitely ruin any temper in the bolt & pulley wheel. too late now, and i'm all for maintaining my own cars, but in this situation, for a car i'd bought new & still under warranty when it happened the first time, if the pulley bolt had come off, i'd return that car to honda - it's their screw up. ultimately, if this stuff is messed up, it means a new crank, & they're /expensive/. better the manufacturer pay, not you. Hi Jeff, Only some small suggestions from my end. If you've never used loctite on your bolt so far, I'd try progressing to the tougher stuff, starting at a light loctite and progressing to the strong stuff just to avoid unnecesary bullshit when removing the bolt for t-bolt changes. I can imagine the difficulty with a strong loctite when you're trying to get the pulley bolt off. Then again, if you have access to an 1100lb impact, who cares? :) Might you try marking the pulley and bolt with a dark sharpie marker to mark their alignment, this way you can see if the slip is gradual? This might not tell you a whole lot, basically whether or not the loctite is sticking or not. If not, you could try tightenting it every time it slips and see if it eventually ever holds. I have a factory manual for a 2004 civic and it shows "splines" in the pulley but no corresponding splines in the crank. Not sure how that holds up the the Accord or actuality in the Civic (since I've never removed the pulley on the Civic, can't specualte whether this is true or not). Anyway, it sounds like quite a pickle. Good luck! - Justin Its possible you didnt get the right torque even though you used an impact. Yes, the crank should be below the face of the pulley when installed. If the pulley or crank have been damaged from wobbling around before it fell off the other times, you may not get the pully to stay on. Without the bolt it hould still fit snug and not wobble on the end of the crank at all. -Pete > I just replaced the crabkshaft pulley on my 1999 Accord for the SECOND time > after it fell off while driving the car. The first time it fell off at 65K [quoted text clipped - 25 lines] > > -Jeff |
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