We recently did a jdm h22 swap into my buddys 94 si lude. Everything went fine till suddenly last week the crank pulley almost came off on the highway. the bolt loosened nearly all the way off and the pulley got all fucked up. luckily the crank and timing are ok. So, were kinda like, wtf?, we got an afermarket unorthodox pulley. made sure to torque it to spec and everything. got new accesory belts, since the old ones were toast, and assumed we were good to go. 2 days later the same **** happen.

-the crank, the threads and the shaft the pulley sits on seem fine.
-the bolt that holds the pulley to the crank is ok

the only thing we've assumed is that we are using an h22 pulley with an h22 alternator but with an h23 ac compressor....could this cause it?? it seems sort of unlikely.

the last time we threw an h23 crank pulley on it with the h22 alternator and h23 ac compressor. and again...same ****....

im aware that the constant off variable in this is the wrong accesory unit....but is this really causing all of this?

Heres a break down of the accesory units:
power sterring is a 4 rib h22
alternator is h22 6 rib
ac compressor is h23 5 rib

 

I've torqued down the crank pulley bolt by hand and never had a problem. It basically tightens itself down every time you run the engine, so in my opinion you definately need to match up all the pulleys...

 

so if i throw an h23 crank pulley with an h22 power steering pump (same teeth count) and the h23 alternator. everything should be ok?

 

the crank pulley has a key
maybe it broke?

 

Use the stock harmonic dampner. It is there for a good reason.

I cant understand people use that aluminium ****, ok maybe you free up 1 bhp but wtf, u expletive up the engine bearings and lose relability.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hondaen &raquo;</TD></TR><TR><TD CLASS="quote">Use the stock harmonic dampner. It is there for a good reason.

I cant understand people use that aluminium ****, ok maybe you free up 1 bhp but wtf, u expletive up the engine bearings and lose relability.

</TD></TR></TABLE>

Dude, this crap has been discussed a million times. It's not going to hurt your engine...I've had one with no problems for almost 3 years.

You're not telling anyone anything new.

It's not even a harmonic damper like a V8, it's a ******* crank pulley.

 

ok the h23 ac has nothing to do with it they are the same compressor for h23 and h22. this happened to me also what i have done is put blue locktight on the bolt and hit it with and get it as tight as you can ( impact gun) and u wont have ne more problems mine hasnt come loose yet. i am running a unorthodox crank pulley as well no harm will be done with it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AznBlueBoy &raquo;</TD></TR><TR><TD CLASS="quote">the crank pulley has a key
maybe it broke?</TD></TR></TABLE>

this would be my guess also..

if you replace crank pulley.. you should of replaced the key as well...

 

the key is fine, check key, crank and pulley all for damage. couldnt find anything really. the pulley got chipped when it nearly fell off that was all

 

i put extra strength loctite on mine
good luck to me getting if off tho

 

Dude, think.

What engine is FUBAR ?

The one with alumimum pulley or the one with stock pulley ?

This would NEVER happen with the stock pulley. End of discussion. Aluminum tears appart under the load and over time, f**** your engine up.

Harmonic vibrations is reason #2 why you dont want to use aluminium crank pulley. Do you realy think Hondas engineers make expensive parts and put them there for fun? Haha..

Ask Laskey racing what they are using....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hondaen &raquo;</TD></TR><TR><TD CLASS="quote">

This would NEVER happen with the stock pulley. End of discussion. Aluminum tears appart under the load and over time, f**** your engine up.

</TD></TR></TABLE>

thanks for your two cents but fyi this happen twice with a stock pulley, first time it was a stock pulley, 2nd time it was UR pulley, and most recently it was a stock pulley again. btw this is my lude my buddy started the thread about, and its happened mult times with the stock pulley

isnt it bad to put loctite on that crankshaft bolt, ive heard that both loctite and using an impact are bad ideas when tightening the bolt although i dont see many other options

 

i never said the engine was "fubar" either. the pulley keeps coming off. now a motor with a thrown rod...thats fubar. i dunno about this problem being classified as fubar thou.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hondaen &raquo;</TD></TR><TR><TD CLASS="quote">Dude, think.

What engine is FUBAR ?

The one with alumimum pulley or the one with stock pulley ?

This would NEVER happen with the stock pulley. End of discussion. Aluminum tears appart under the load and over time, f**** your engine up.

Harmonic vibrations is reason #2 why you dont want to use aluminium crank pulley. Do you realy think Hondas engineers make expensive parts and put them there for fun? Haha..

Ask Laskey racing what they are using....

</TD></TR></TABLE>

This has been argued numerous times before. The bottom end of Hondas is balanced very well, so there is no need for a damper. The rubber in the stock crank pulley is NOT a harmonic damper, but is there to cut down on noise from the driven accesories(NVH). And if aluminum is so weak why are there so many aluminum blocks and heads in production these days? Engines have expierienced premature bearing failure with and without an underdrive pulley. It has not been proven either way. But I don't believe the bolt spinning out can be attributed to the pulley.

OP: Are you sure the threads in the crankshaft are ok? Make sure you get a new bolt, if you didn't already lose the old one. If the pulleys line up the ribs shouldn't make a difference. If everything checks out, I say use loctite and tighten that bish down. You'll have to heat it up if you ever need to get it off again.

Edit: Just found this, make sure you have the right size bolt:
https://honda-tech.com/zerothread?id=1589712

 

we've actually never lost the bolt, its the same one that came with the jdm h22 from HmotorsOnline, we are looking into replacing it though; just to cover all of our bases

thanks for the help, any other suggestins just keep em coming