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Crank not drilled @#&#$%!!!
#1409569
03/26/13 10:29 PM
03/26/13 10:29 PM
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Joined: Jun 2005
Posts: 5,102
Western Md.
skicker
OP
"The Champ"
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OP
"The Champ"
Joined: Jun 2005
Posts: 5,102
Western Md.
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So I am in the process of putting together a new .060 over 340 for the 69 Dart. Have the crank polished, everything checks out nice. Install the rods and pistons, camshaft, timing chain, lifters, yada,yada,yada. Everything painted nice Hemi Orange with new Eddy Aluminum heads, aluminum intake with an old set of M/T valve covers. Complete motor down to the alternator brackets.  Remove it from the engine stand and attach it to the dolly I use to install motors from underneath. 727 Trans rebuilt painted and ready to go. Install the 3500 Fairbanks converter and attach the flex plate to the crank. I line everything up straight and start to bolt it up. Trans is 1/2" away from the block and torque converter is already locked tight to the crank. Finger tight 7/16 bolts in bottom of block only.  WTF????? NOW!!!!!!!  Loosen it back up and slide it apart and low and behold the crank was never drilled for a torque converter...  again WTF??????  Motor was removed from my 73 p/u before being rebuilt, which was a 4 speed. Long story short has anyone ever ran into this???? Motor has to come completely back apart  so the back of the crank can be drilled to accept a converter, as the converter is hub centric on the back of the crankshaft.  Man after today I can definitely confess to cussing while working on my car!!! 
...FAFO...
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Re: Crank not drilled @#&#$%!!!
[Re: skicker]
#1409570
03/26/13 10:38 PM
03/26/13 10:38 PM
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Joined: Apr 2007
Posts: 2,826
NY usa
540challenger
master
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master
Joined: Apr 2007
Posts: 2,826
NY usa
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Quote:
So I am in the process of putting together a new .060 over 340 for the 69 Dart. Have the crank polished, everything checks out nice. Install the rods and pistons, camshaft, timing chain, lifters, yada,yada,yada. Everything painted nice Hemi Orange with new Eddy Aluminum heads, aluminum intake with an old set of M/T valve covers. Complete motor down to the alternator brackets. Remove it from the engine stand and attach it to the dolly I use to install motors from underneath. 727 Trans rebuilt painted and ready to go. Install the 3500 Fairbanks converter and attach the flex plate to the crank. I line everything up straight and start to bolt it up. Trans is 1/2" away from the block and torque converter is already locked tight to the crank. Finger tight 7/16 bolts in bottom of block only.
WTF????? NOW!!!!!!!
Loosen it back up and slide it apart and low and behold the crank was never drilled for a torque converter...
again WTF??????
Motor was removed from my 73 p/u before being rebuilt, which was a 4 speed.
Long story short has anyone ever ran into this????
Motor has to come completely back apart so the back of the crank can be drilled to accept a converter, as the converter is hub centric on the back of the crankshaft.
Man after today I can definitely confess to cussing while working on my car!!!
3 reason come to mind
1. convertor not all the way on try standing the trans on the tailshaft and spinning it,
2. Check the back of the crank and see if the is the lae model pilot bearing in the back of the crank that could cuase the same problem
3. It your crank could be the old 66 or 67 and back 273 crank which has a smaller diameter opening for the convertor.
Number 3 is the worst case 1 or 2 should be an easy fix
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Re: Crank not drilled @#&#$%!!!
[Re: skicker]
#1409571
03/26/13 10:40 PM
03/26/13 10:40 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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dont see how there could not be a recess for the converter nub.
live every 24 hour block of time like it's your last day on earth
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Re: Crank not drilled @#&#$%!!!
[Re: 540challenger]
#1409572
03/26/13 10:57 PM
03/26/13 10:57 PM
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Joined: Jun 2005
Posts: 5,102
Western Md.
skicker
OP
"The Champ"
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OP
"The Champ"
Joined: Jun 2005
Posts: 5,102
Western Md.
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540...
No 3 is what I think the problem is.
I know we used 273 rods and now that I think about it it is a 273 steel crank. But I never knew there was a difference in the converter snout. It is drilled for a converter but the diameter is only about 1 3/8" instead of about 1 13/16".
...FAFO...
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Re: Crank not drilled @#&#$%!!!
[Re: skicker]
#1409573
03/26/13 11:01 PM
03/26/13 11:01 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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You got it, you'll need a TC with the early smaller OD & hopefully one of the trans/tc companies have something off the shelf. Well at least you dont have to go back into the eng
live every 24 hour block of time like it's your last day on earth
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Re: Crank not drilled @#&#$%!!!
[Re: RapidRobert]
#1409575
03/26/13 11:12 PM
03/26/13 11:12 PM
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Joined: Jun 2005
Posts: 5,102
Western Md.
skicker
OP
"The Champ"
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OP
"The Champ"
Joined: Jun 2005
Posts: 5,102
Western Md.
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If it was only that simple. This is a build between myself and my dad of a re-creation of a 69 Dart drag car that he owned. He has a body and basically we use all of my extra parts to put it together. Its fine with me I will probably never build another small block car anyway. After I left this evening to go home and do a little research he calls me after I typed the previous post to tell me the crank is out of the motor and is ready to go back to the machine shop in the morning to be drilled. Seeing as how patience is supposed to be a virtue I sure hope it is because if its genetic I'm screwed...
1 step forward and about 200 back...
...FAFO...
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Re: Crank not drilled @#&#$%!!!
[Re: skicker]
#1409577
03/27/13 09:22 AM
03/27/13 09:22 AM
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Joined: Apr 2007
Posts: 2,826
NY usa
540challenger
master
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master
Joined: Apr 2007
Posts: 2,826
NY usa
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Quote:
If it was only that simple. This is a build between myself and my dad of a re-creation of a 69 Dart drag car that he owned. He has a body and basically we use all of my extra parts to put it together. Its fine with me I will probably never build another small block car anyway. After I left this evening to go home and do a little research he calls me after I typed the previous post to tell me the crank is out of the motor and is ready to go back to the machine shop in the morning to be drilled. Seeing as how patience is supposed to be a virtue I sure hope it is because if its genetic I'm screwed...
1 step forward and about 200 back...
LOL well he jumped the gun it might be easier/cheaper to send the convertor out and have them machine down the snout.
I not sure you can open up the back of the crank to take the larger convertor plus you would need to rebalance it.
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Re: Crank not drilled @#&#$%!!!
[Re: GODSCOUNTRY340]
#1409581
03/27/13 12:10 PM
03/27/13 12:10 PM
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Joined: Jun 2005
Posts: 5,102
Western Md.
skicker
OP
"The Champ"
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OP
"The Champ"
Joined: Jun 2005
Posts: 5,102
Western Md.
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540.. The motor is a 69 block that has been together and running at .060 for a better than 25 years with no issues. I bought it in 1988 and put it in a p/u I had that ran 12.44@112. Motor sat for about 6 years and I freshened it for my 4x4 in 1995. Drove it until 2001 and motor sat for another 11 years. When we pulled it apart to check it out the bore was still good. I guess not being ran a lot over the years has saved it. We replaced the rotating assembly with rods and crank that had been together in a 273 with low miles. everything checked out good at the machine shop so we used those. I never realized or noticed the opening in the back of the crank until time for the transmission. It is a huge PITA but having the crank drilled to match the converter will fix the problem. We mic'd the converter snout and the back of another 318 crank to double check the diameter. By using the two it looks like there is about .005 difference in the crank diameter and the t/c snout. The machine shop said it isn't anything difficult to do. Donnie...I thought there was something to the fact that the older 727 converters were different than the later ones but I didn't know exactly what the differences were. I didn't know you got the car from Buddy. I remember Nick talking about it yrs ago and said that it got wrecked when it was on a tow-bar or something on its way to Petersburg. I don't know for sure what ever happened to it. Godscountry340...I'm not sure about being baked at my house but I know it is when baked at yours....  Get back to your honey-doos!! I know the wife has a long list of things you need to be doing.
...FAFO...
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Re: Crank not drilled @#&#$%!!!
[Re: mopars4ever]
#1409583
03/27/13 01:51 PM
03/27/13 01:51 PM
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Joined: Sep 2006
Posts: 1,139
West Tennessee
rbstroker
super stock
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super stock
Joined: Sep 2006
Posts: 1,139
West Tennessee
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I believe that it is only the early 904's that had a different snout from the later ones. The 727's are the same size, I believe. All the early 273's with an automatic trans were 904 equipped.
This is the land of the free
because of the brave
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Re: Crank not drilled @#&#$%!!!
[Re: skicker]
#1409584
03/27/13 03:31 PM
03/27/13 03:31 PM
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Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,748
Rio Linda, CA
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If the crank is from a small-register 273, the 727 flexplate should be a sloppy fit on the outside of the register.
If the flexplate fits the outside of the register properly and the converter hole is too small it might be a 4-speed crank that never had the converter register machined to final size....seen it a couple of times before.
The INTERNET, the MISinformation superhighway
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Re: Crank not drilled @#&#$%!!!
[Re: Jim_Lusk]
#1409587
03/27/13 10:34 PM
03/27/13 10:34 PM
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Joined: Jun 2005
Posts: 5,102
Western Md.
skicker
OP
"The Champ"
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OP
"The Champ"
Joined: Jun 2005
Posts: 5,102
Western Md.
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All of the parts are all internally balanced parts in a different combination. There was no balance of the rotating assembly done. Where would the balance issue come from? 273 crank and rods are internal. Fairbanks 3500 converter is a zero balance for a 340. Flex plate is a zero balance part also. Granted using the 273 rods creates a lighter bob weight but that is evenly distributed over all eight journals. If there is something I'm missing here someone set me straight before I re-install the crank.
...FAFO...
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