WRXRacer111

Alrighty... '91 Civic Si, D16A6 stock motor. I'm trying to get the crank pulley bolt off, and thus far have been unsuccessful. I've tried 4 different impact guns of varying strengths, all of which have had no luck. I put an impact socket on a few extensions and a breaker bar, put a 6 foot pipe on that to get leverage. The net result is that the impact socket SPLIT APART, and the bolt is still firmly attached, holding the crank pulley in place. I tried PB-Blasting the bolt before all this. Does anyone have any other good suggestions?

MidoriBG96

just keep lubin her up and keep trying. I noticed you said you used a couple of extensions with the breaker bar. Try not to use extensions if possible unless its a short impact extension. Just get a Impact gun and just hold it full throttle it might eventually break loose.

alupso

I purchased this impact wrench from lowes and it took off the crank bolt on my D16A6 with no problem and I was using my cheap-o $100 Harbor Freight compressor.

http://www.lowes.com/lowes/lkn...=none

Speed--Freak

I wonder how much twisting force you placed on the crank and crank bearings when you did that with the pipe? Your lucky you didn't ruin your motor or drive line.

Now that you know not to do that again lets get it off.
I had the same problem you are having and I tried big impacts. Nothing worked untill I remembered a shop across town has the BIG impacts. To be exact it was a RV service center. The impact they had to use needed two hands to hold it and it had a 1 inch drive.
It was rated to 1700ftlbs and it popped right off.
Go find a RV shop or Semi shop.
They'll have the guns you need.

court

i had a very similar problem. after 2 days of engineering i devies a method of bust off the bolt. and this puppy was ON THERE. since its pre 93, your crank pulley should have holes in it . I still had a chain from my swap so i snuck a bolt , which in my case was a 14mm head, through the chain and into one of the holes. it was about 2inches long in length. then on the mount bracket( the one that bolts to the block) i did the same thing withthe chain- i bolted that to the mount. there another bracket that connects the head to the mount, i guess for stregth. take that braket off and use that bolt to tie it down. That wall all the torque being exerted stayed within the motor and wasnt being distributed to the rubber mounts. i used a 1/2 drive and a 17mm socket, with a 2 foot breaker bar. got it off fairly quickly... in my previous attemps prior to the chain the pulley method, i snapped 3 ratchets...
good look young homie

shortyz21

if u guys dont hae a good impact, just drop the car onto a breaker bar...

SIXTY

Try using a ratchet instead of a breaker bar, with a long a*s piece of pipe on it. I have had better luck when doing this with a ratchet, sometimes a breaker bar has a tendency to flex a little.

MyEVO8u

make sure your regulator is turned up ...and try impacting it on and then off ...do that a couple times it might work thats what i did for about 5 min and mine popped right off

shbrown

How are you holding the crank still? I used the two hole technique, I put short bolts in the two holes. Then took a short crow bar and placed it between the bolts and resting against the frame. This stops the crank from turning, and then a breaker bar/pipe works. (at least for me)

Also, try to search. I found my technique on here.

-S

Sgt_Ox

I invested money in that Moroso tool. So far it's been worth my money since I've had it for 5 years now.

HatchBox

put the wrench on there, Make sure its turning the right way... make sure the wrench will catch the ground/frame.

Get in car. give it a quick crank. vahlah crank bolt is loose

si0385.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WRXRacer111 &raquo;</TD></TR><TR><TD CLASS="quote">Alrighty... '91 Civic Si, D16A6 stock motor. I'm trying to get the crank pulley bolt off, and thus far have been unsuccessful. I've tried 4 different impact guns of varying strengths, all of which have had no luck. I put an impact socket on a few extensions and a breaker bar, put a 6 foot pipe on that to get leverage. The net result is that the impact socket SPLIT APART, and the bolt is still firmly attached, holding the crank pulley in place. I tried PB-Blasting the bolt before all this. Does anyone have any other good suggestions?</TD></TR></TABLE>

dont use extentions on your impact gun you lose a ton of torque might as well be using a 1/4 inch impact.... use a shalow 17 and it sould break loose and use a strong impact gun i have a husky ive had for 2 years and it was by far the best buy for the price its prety strong but it dont get much better than a ingersoll rand TNT i think there like 1200 ft lbs of torque bad *** the mechanic in my bay across from me had one

ludesrv

A high powered impact + wd40 + so good'ol fashioned elbow grease = Remove crank bolt.

Seriously, just hold the impact down, go forward and back over and over and over and it will break loose.

MyEVO8u

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jaydeum4lyfe &raquo;</TD></TR><TR><TD CLASS="quote">dont use extentions on your impact gun you lose a ton of torque might as well be using a 1/4 inch impact.... use a shalow 17 and it sould break loose and use a strong impact gun i have a husky ive had for 2 years and it was by far the best buy for the price its prety strong but it dont get much better than a ingersoll rand TNT i think there like 1200 ft lbs of torque bad *** the mechanic in my bay across from me had one</TD></TR></TABLE>
yeah ive got the ingersoll rand gun its incredable

Hondacivic90ed

A crankpulley bolt that I need to remove was on a 1993 dx hatch with the crank pulley with holes and I used an old head bolt, plank of wood, my foot, and a 1/2 ratchet with a 17mm socket and 3inch extension. I put the head bolt through one of the holes and put the plank of wood up against the bottom of the oil pan to take up the impact instead of denting it and then i laid under the car and kicked the ratchet once and it came right off, this was after trying an impact gun and breaker bar, I have since bought the moroso tool for the other more common types of crank pulleys.

on2wheels

A pulley holder such as an SIR Tools pulley holder along with a breaker bar for the bolt has worked excellent for me.
http://www.sirtools.com/asian.htm
http://www.etoolcart.com/index...D=697
There are a couple of different versions for different pulley styles so you would need to figure out which one you need.

I wasn't alway successful with a 1/2" impact wrench but the pulley holder with a large wrench and breaker bar has worked everytime.

Bc1r6x

i had to use a 3/4 impact gun i barrowed from a diesel shop and that still took a good 15 min. at full blast

M Coop

Try working the impact in forward and reverse back and forth, it helps to loosen it up. Also if you know how, turn up the air pressure on your air compressor (don't forget to unplug it first, if you've never been hit by 220 trust me, it hurts like a muthafucka, you don't want none) if you don't know how to turn it up, tighten the nut on the on/off switch/pressure switch. If that doesn't work you might have to buy the pulley holder tool that fits inside the hexagonal hole inside the pulley. Not sure how much they cost but they're worth every penny.

Not_So_JDM

my snap on impact had no problems taking off the crank pulley from my LS..buy a stronger impact?

StorminMatt

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Speed--Freak &raquo;</TD></TR><TR><TD CLASS="quote">I wonder how much twisting force you placed on the crank and crank bearings when you did that with the pipe? Your lucky you didn't ruin your motor or drive line.</TD></TR></TABLE>

It is highly unlikely that you will do damage by doing this. You will slip the clutch before you damage anything. And as you probably know, people run turbo setups that cause the clutch to slip, but do no damage to the engine. And considering that some people run turbo setups with 400+ft-lb torque on a stock crank, you can see just how robust the crank assembly really is.

Speed--Freak

Ahh..BUT
When that 400 lbft of torque is being used, the crank is suspended by the oil pressure.
If your cranking on the crank with a 6 foot pipe and 0 oil pressure the crank is being driven right into the bearings.

court

thats a good point speed freak

Speed--Freak

The only reason I say that is because my friend did it when he changed his water pump and timing belt on his rex. He used a big breaker bar to get the bolt off and when he was done he had a knock. Well after lots of swearing he yanked out the motor and found out he deformed his main bearings.
Turns out they are so soft that you can almost scratch them with your finger nail.
Now think about the amount of torque being applied to the crank bearings when you are doing that.
It's a HUGE amount and like I said before it is just driving the crank right into the bearings.

Now when you use an impact it is so fast that the torque is never transfered to the crank bearings.

I'm not trying to blast anyone, but when you try to give other people advise make sure it won't cost them a motor or at least alot of labor.

Craigp23usa

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Speed--Freak &raquo;</TD></TR><TR><TD CLASS="quote">Ahh..BUT
When that 400 lbft of torque is being used, the crank is suspended by the oil pressure.
If your cranking on the crank with a 6 foot pipe and 0 oil pressure the crank is being driven right into the bearings. </TD></TR></TABLE>

Yes