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Author Topic: MS LIBERTY a Wild Weasel's belly tank  (Read 642950 times)

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Offline SPARKY

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1950 on: March 08, 2015, 02:52:27 PM »
ready to drill after lunch.

 I have been told the most folks do not drill and tap the block for bell housing bolt that gm did not drill on the LS block---opinions --comments
Miss LIBERTY,  changing T.K.I.  to noise, dust and RUST!!!

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Offline SPARKY

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1951 on: March 08, 2015, 08:58:01 PM »
need to get me a good 5/8" drill bit and some 5/8" round stock for the extended pins  then to Hughes for the pump drive kit for the LS to run with out a converter..
Miss LIBERTY,  changing T.K.I.  to noise, dust and RUST!!!

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Offline Jack Gifford

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1952 on: March 09, 2015, 12:07:36 AM »
If those 5/8" pins perform the alignment of engine-to-trans, then you'd need the precision of a reamer (and a squaring jig), rather than just a drilled hole.
M/T Pontiac hemi guru (or does guru status expire after 30 years?)

Offline SPARKY

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1953 on: March 09, 2015, 09:33:42 AM »
Thanks for the heads up Jack-- back to the drawing board.   I went to great lengths to square up the drill press table but I will research it more.

Miss LIBERTY,  changing T.K.I.  to noise, dust and RUST!!!

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Offline fordboy628

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1954 on: March 09, 2015, 09:54:48 AM »
If you have access to a vertical mill, tram it up(square it), and use a reamer to finish the holes.   WAY more accurate than a drill press.

Use a hardened and ground dowel pin for location, press fit in one part, slight (.0005"/.001") clearance in the mating part.

Just my 2 cents
F/B
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Offline SPARKY

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1955 on: March 09, 2015, 02:42:21 PM »
Do have a mill should be tram ---learned a new word---  when I was out buying 5/8 stock  ran into Marty he suggested to use the mill and a 5/8" end mill
Miss LIBERTY,  changing T.K.I.  to noise, dust and RUST!!!

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Offline manta22

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1956 on: March 09, 2015, 03:06:00 PM »
Bill;

An end mill will cut a hole that is slightly larger than the diameter of the end mill. You want to drill a hole a few thousandths smaller than 5/8" and use a reamer as others have suggested.

Regards, Neil  Tucson, AZ
Regards, Neil  Tucson, AZ

Offline Rex Schimmer

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1957 on: March 09, 2015, 08:12:08 PM »
Basic rule of reaming holes. If you run the reamer into the hole and stop it before you pull it out you will have a press fit hole. If you run the reamer in and out, while turning, you will have a slip fit hole. Works for me.

Rex
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Offline SPARKY

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1958 on: March 09, 2015, 09:30:09 PM »
question  if  the trans and the eng are the ones to be aligned why would I want a press fit in a plate that is to be sandwiched between the to mounting surfaces?  IMNTK
Miss LIBERTY,  changing T.K.I.  to noise, dust and RUST!!!

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Offline Jack Gifford

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1959 on: March 10, 2015, 12:42:16 AM »
To answer your question: a slip fit in both pieces doesn't accomplish as precise alignment as a single slip fit (press fit in the other piece).
What is the overall dowelling scheme- two pins to locate block-to-plate and another two for plate-to-trans? Or simply two pins that extend all the way from engine to trans?
M/T Pontiac hemi guru (or does guru status expire after 30 years?)

Offline SPARKY

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1960 on: March 10, 2015, 06:53:51 AM »
There are 6 bolts and two locator pins



           o       o

     o                    o

     0                     0

     o                     o


               
Miss LIBERTY,  changing T.K.I.  to noise, dust and RUST!!!

The # 1 issue is: TO KEEP THE REPUBLIC      
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"Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure or nothing."   Helen Keller

Offline Rex Schimmer

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1961 on: March 10, 2015, 02:59:17 PM »
Sparky,  If the plate is just a spacer they you are right that you probably only need to press fit into the block and simply have a good quality drilled hole for the pin through the plate which should be at max about .005 over size and if you make the bolt holes 1/32 inch over size the plate should be relatively easy to install and all of the bolts should line up. Note that if the locating dowels are pressed into a blind hole in the engine block you would be ahead to have a through hole drilled through them and have the end that sticks out drilled and tapped for a puller. Even though dowel pins are hardened the larger ones are only hard on the outside and if you grind the end a little you can drill them. The hole allows the pin to be driven completely into the hole with out trapping air which will not leak out past the press fit.            Rex
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Offline Stan Back

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1962 on: March 10, 2015, 05:35:57 PM »
Do the best you can.  Drill 'em, mill 'em, ream 'em, whatever.  Don't tighten everything down, and then just tighten everything while it's running and let it self-align.  Works every time (usually).

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Offline Peter Jack

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1963 on: March 10, 2015, 05:44:19 PM »
Do the best you can.  Drill 'em, mill 'em, ream 'em, whatever.  Don't tighten everything down, and then just tighten everything while it's running and let it self-align.  Works every time (usually).

Stan

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Offline SPARKY

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Re: MS LIBERTY a Wild Weasel's belly tank
« Reply #1964 on: March 10, 2015, 06:13:44 PM »
And the winner is   SB   :-o   :cheers: :cheers: :cheers:
Miss LIBERTY,  changing T.K.I.  to noise, dust and RUST!!!

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"Security is mostly a superstition. It does not exist in nature, nor do the children of men as a whole experience it. Avoiding danger is no safer in the long run than outright exposure. Life is either a daring adventure or nothing."   Helen Keller