727 starter stud questions.....

[bandit67]

Guys, the starter bolt holes in my 727 case are very sloppy and I thought were stripped. Did the factory use studs in one or both these , if so what size were used. A 7/16 x 14 bolt will go in loosely and a 1/2 bolt will not. Also on the stud was a course thread used into the 727 case with starter nut being a fine thread. What was OEM. Think I wish to get away from using starter bolts while I have a little bit of case thread left.....

 

[Don Frelier]

7/16" Coarse for both holes.
Stud on the top with fine thread for the nut.
Maybe time for a heli-coil?

 

[440Coronet500]

Does anybody know why Mopar went with a fine thread for the starter stud nut? 440'

 

[Daves69]

Here's what comes in a re-pop fastener kit........
https://www.manciniracing.com/mastboandmos.html

 

[w.Hudson]

I believe the stud on the bottom served two purposes.
1. The shoulder on the stud has a part in the alignment of the starter in the bell housing.
2. It also would hold the heavy starter in place during installation.

And

3. It has different threads and each threaded side is a different length so it can only
be installed one way.

That is just my 2 cents

 

[Don Frelier]

Stud goes on top, at least that's always how I do it.

 

[66Satellite47]

IIRCC my OEM setup on my '70 Barracuda, the stud was on top. Over the years I have put the stud in either top or bottom depending on which was easier for the headers I was using.

 

[493 Mike]

Starter stud has always been on the bottom.
Mike

 

[bandit67]

Ok, would a 2 inch stud be the ticket or maybe 2.5 inch . I don t think I am quite ready for a heli coil in there yet , but I am thinking a bit of epoxy would assist in keeping the stud from backing out. Wonder it that would cause problems down the road.....

 

[493 Mike]

Ok, would a 2 inch stud be the ticket or maybe 2.5 inch . I don t think I am quite ready for a heli coil in there yet , but I am thinking a bit of epoxy would assist in keeping the stud from backing out. Wonder it that would cause problems down the road.....

I think you could reach in the hole with a small stick covered with JB Weld and semi fill the threads. Leave the first two open to start a thread tap and then clean out the excess epoxy with the tap. That would take out the wobble.
Mike

 

[Dipstick]

I believe the stud on the bottom served two purposes.
1. The shoulder on the stud has a part in the alignment of the starter in the bell housing.
2. It also would hold the heavy starter in place during installation.

And on automatic cars, it holds the cooler line bracket.

 

[66Satellite47]

Starter stud has always been on the bottom.
Mike

Mike, thinking about it my '70 OEM setup was on the bottom and did hold the cooler line bracket.
Putting it on top was easier on my '65 Coronet with the multi piece Hooker headers and removable #7 tube. Hang the starter on the upper stud, easy access to the nut, easy access to the lower bolt.

 

[493 Mike]

Mike, thinking about it my '70 OEM setup was on the bottom and did hold the cooler line bracket.
Putting it on top was easier on my '65 Coronet with the multi piece Hooker headers and removable #7 tube. Hang the starter on the upper stud, easy access to the nut, easy access to the lower bolt.

I wasn't trying to be critical, just relaying what I have learned as a Chrysler mechanic for the last 50+ years.
Mike

 

[66Satellite47]

I wasn't trying to be critical, just relaying what I have learned as a Chrysler mechanic for the last 50+ years.
Mike

No problem, my memory sometimes confuses the OEM with my modified race car stuff.