we striped the crank bolt hole and now the bolt wont tighten, where can we get a tap big enuff to tap it, and how do you do it, i really dont wana to pull the motor, ps what size should it be tapped to and size of the new bolts, where to get em, etc,,,,,,

<small>[ September 22, 2002, 10:27 AM: Message edited by: Grinch ]</small>

 

TTT plz

 

ttt

 

I did the same thing to mine. I bought a tap and die set from Ebay. It cost me around $40.00 for a decent kit. It worked fine and cleaned out the threads.

 

You weren't trying to use the bolt to install the crank pulley were ya? Shame on you <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

 

I was under the impression that you had to use the old bolt to install the pulley with a little anti seize on it...

 

ok so so i retap to the same size or do i move up a size (what size would that be?) and where to get the bolt? thnx guys

<small>[ September 23, 2002, 05:58 AM: Message edited by: Grinch ]</small>

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 98blackSS:
<strong>You weren't trying to use the bolt to install the crank pulley were ya? Shame on you <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I have always used the bolt to install the crank pulley and would really like a better way... so please give in. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by LS171Malibu:
I have always used the bolt to install the crank pulley and would really like a better way... so please give in. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Spend $17 at a local bolt shop and get 3' of threaded rod, a couple nuts, and a few washers, all the same size/pitch as the crank pulley bolt.
Cut a piece of rod, fully screw it in to the crank, and use the nut to push the pulley on to the crank. Cake. Same piece works to push the timing gear on the crank with a piece of pipe fitting. A shorter piece of the rod can be threaded in and used to be 'pushed against' by a puller when removing the pulley. Good investment. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

-Andrew

 

Like he said, use the correct tool or use the threaded rod/bolts n washers. The idea is to put the force on the threaded rod and not on the crank threads. Problem with using the old bolt to do this is your putting a tremendous force on only a few threads on the crank side. 2 or 3 threads is not enough strength to start pulling that sucker on.

 

ok so back to my original question,, what size do i tap too, the same or one size bigger(whatsize would that be?

 

Anybody know the size/pitch of the Crank bolt?

 

My guess would be to use the same size assuming that you only stripped out a small portion of the threads. Why not PM or email 2000 pewter WS6 and ask what he did.

I dont think you can tap to a larger size without drilling it out and starting from scratch anyway, then it might require a bolt that is too large to fit correctly.

Good luck

 

Just take a new bolt (they're about $2.50 from GM) to your local hardware store and have them match it up and give you the appropriate tap. Most likely you only boogered up the first few threads in the crank, and shouldn't have any long term adverse effects.

The advice about making a balancer installer from a piece of threaded rod should be listened to. That's the "right" way to do it, and you won't risk messing anything up.