crank pin problem???
Thread Starter
Racer
Joined: Jun 2003
Posts: 464
Likes: 0
From: JACKSONVILLE FL
crank pin problem???
Well, I started the crank pinning process today and all was well until I went to put the pin in the crank. After I driiled the hole (with the bit supplied in the kit) I grabbed a hammer and punch and went back under the car, only to find that the pin would go in with absolutly no pressure what so ever. I can also remove the pin with just a magnet.
I'm going to call the company I got the kit from Monday, but thought you guys might have some suggestions, I don't really want to have to wait until next weekend to start putting it back tgether.
Only thing I can think will work is to get a slightly bigger pin.
I'm going to call the company I got the kit from Monday, but thought you guys might have some suggestions, I don't really want to have to wait until next weekend to start putting it back tgether.
Only thing I can think will work is to get a slightly bigger pin.
Thread Starter
Racer
Joined: Jun 2003
Posts: 464
Likes: 0
From: JACKSONVILLE FL
Yea, the kit comes with a "pin fixture" so you drill straight and exactly where you should. Only problem seems to be that the hole is just a tiny fraction of an inch to big in diameter than the pin.
Le Mans Master
Joined: Aug 2004
Posts: 5,972
Likes: 48
From: NCM Lifetime#2195 Bulverde, Texas 78163
St. Jude Donor '13
Cut the back end of the drill off and use that as the pin. Check to see if is snug first. Should work fine.
Instructor
Joined: May 2009
Posts: 132
Likes: 0
From: Calgary Alberta
Cutting the back off the drill bit is a good idea, if that fails to be tight enough, and you can't find any pins let me know the exact size and length you want and I will fire up my lathe and make you a pin.
You're in a bind now as you already have the hole. But don't worry too much if you have plenty of time, worst case is getting a pin made.
You're in a bind now as you already have the hole. But don't worry too much if you have plenty of time, worst case is getting a pin made.
Thread Starter
Racer
Joined: Jun 2003
Posts: 464
Likes: 0
From: JACKSONVILLE FL
Cutting the back off the drill bit is a good idea, if that fails to be tight enough, and you can't find any pins let me know the exact size and length you want and I will fire up my lathe and make you a pin.
You're in a bind now as you already have the hole. But don't worry too much if you have plenty of time, worst case is getting a pin made.
You're in a bind now as you already have the hole. But don't worry too much if you have plenty of time, worst case is getting a pin made.
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Burning Brakes
Joined: Mar 2006
Posts: 790
Likes: 63
From: Ft Worth TX
One thing to consider is that the pin will be trapped in the hole by the washer, so it is not going anywhere. Unless is it really loose in the hole, a little loctite and you should be fine.
I like the drill bit idea too.
I like the drill bit idea too.
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
Drills are always made of hardened steel, which is what the pin might be, assuming it isn't simply mild steel. Stresses on it are not very high.
Safety Car
Joined: Sep 2007
Posts: 3,502
Likes: 82
McMaster-Carr shows 19 different material compositions used in dowel pins. The quality of a drill bit runs all over the spectrum....many are very brittle.
Le Mans Master
Joined: Oct 2007
Posts: 6,149
Likes: 11
From: Greater Detroit Metro MI, when I'm not travelling.
To the OP: measure the hole, go to mc master Carr online, or a fastenal if there is one near you and buy a steel rod that fits: you are making way too big of a deal out of this: your crank pulley is held on by a very tight press fit and a massive bolt; that dowel pin is only there to stop it from slipping with the added drive power of the supercharger and the second it tries to do that it will catch the pin and lock one to place: the pin by no means needs to be hammered on tight. Get a slightly bigger on at mcmaster if it makes you sleep better at night but don't worry so much.
Last edited by PowerLabs; Mar 7, 2011 at 06:25 AM.
Le Mans Master
Joined: Aug 2004
Posts: 5,972
Likes: 48
From: NCM Lifetime#2195 Bulverde, Texas 78163
St. Jude Donor '13
Thread Starter
Racer
Joined: Jun 2003
Posts: 464
Likes: 0
From: JACKSONVILLE FL
I called for some tech support today and they said it was no problem. Sometimes they need a little nudge and sometimes they slide right in.
I thought about a bigger bit but the next size I had was too big.
Doesn't your drill bit set have bigger bits? Find one that fits. The last two cranks I've pinned both were done with hacked off drill bits. Still had the fixture, but no pins.
