L71 starter motor attachment holes

[Kenneth K.]

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[Leif A.]

Re: L71 starter motor attachment holes

Kenneth,
Were there separate applications for 4-speed and automatic transmissions? Below is what Corvette Central shows as "correct" for your application.

https://www.corvettecentral.com/c3-68-82/battery-electrical/starter/65-70-396-427-l88-remanufactured-starter-with-302154?returnurl=%2fsearch%3fcurrentsearchcategoryid%3d%26q%3dbig%2bblock%2bstarter%26years%3d1967

[Kenneth K.]

[Kenneth K.]

[Kenneth K.]

[Kenneth K.]

[Joe L.]

Re: L71 starter motor attachment holes

Hi Dave-

I have an old tire I can put under the oil pan that should work well. Thanks for clarifying how long I can keep the S terminal energized. That was my next question.

I think my rigging for the picker is safe. I use 1/4” chain doubled on each end of my equalizer bar and 1/4” shackles at each end of the chain that are attached to my lifting brackets. The shackles are rated for overhead lifts but only rated at 1,000 lbs ea. for a total of 2,000 lbs. I have a straight lift so 2,000 lbs should give me a safety factor of almost 3 times if the BB weighs around 750 lbs. My concern is I have only 3 bolts on the lifting brackets to hold the 750 lbs. My lifting brackets are installed at the factory designated lifting points so they should be just fine… I don’t plan on moving the picker around my shop so its just a static load until I get ready to install the engine back in the car.

I have the engine attached to the faceplate on my engine stand with 4 grade 8 bolts. These 4 bolts are attached into the bell housing bolt holes on the engine. There is a lot of leveraged weight on these 4 bolt holes. Is there any risk that all that leveraged weight could crack the block at the bolt holes? Have you ever heard of that happening to a BB? This is my nightmare situation…

Thanks,
Ken

Ken------


If you have the 4 bolts properly torqued (35 lb/ft) and your engine stand is rated for the big block weight, there should not be a problem. For a big block, I do not recommend a "3 point" engine stand regardless of its weight rating; use a "4 point" engine stand.

[Kenneth K.]

[Kenneth K.]

[Joe L.]

Re: L71 starter motor attachment holes

Hi Joe-

. Do you think it’s safe to leave the engine on the stand for a couple months while I get it and the engine bay ready for the reinstall?


Ken

Ken------

Yes, I think it's safe to leave the engine on the stand for a few months

[Joe L.]

Re: L71 starter motor attachment holes

Hi everyone,

I am working on a 1969 L-71 SHP 427/435 automatic. I pulled the engine so I can repaint it and freshen up the engine bay. Since the starter occasionally whinnied and some of the flexplate teeth were slightly chipped I decided to replace the starter and flexplate at the same time. I am going to replace the starter with a remanufactured since I don’t plan to show the car.

Here is my problem;

The old starter I pulled off the engine has a 2 hole attachment case with casting Delco #1109052 dated 7E11. I don't know if this is remanufactured or not. The new remanufactured starter tag says it is a GM#10496870 323-364. The casting number looks something like 1108781 6C 9 or it could be 1108 81 6C 9. It also has a 2 bolt attachment case.

The attachment holes for the two different starters are not in the same place. Please see the attached pictures. The new starter (on the left with the gold solenoid) is the new remanufactured 323-364 and the attachment holes are parallel with each other. The old starter the 2 attachment holes are offset from each other.

The block actually has what appears to be 3 attachment holes. I attached a picture of the block and you can see the pattern for the 3 holes. It appears I would be able to mount either of the 2 hole starters or a 3 hole starter.

So my question is what is the correct starter. The starter with 2 parallel holes, the starter with 2 offset holes or a starter with 3 attachment holes?

Thanks,
Ken
[ATTACH=CONFIG]124381[/ATTACH][ATTACH=CONFIG]124382[/ATTACH]

Ken------


There are two different aluminum starter noses used on Corvette engines of the 1963-82 period.

The first one uses 1 "long" and 1 "short" starter bolts in a "straight across" pattern. This nose was used on all 1963-82 Corvettes with 12-3/4", 153 tooth flywheels/flexplates. This nose was originally GM #1957885, later GM #1967319 and finally GM #1968122


The second aluminum starter nose used 2 "long" starter bolts in an "offset" pattern. This nose was originally GM #801188, and later GM #1893864 and GM #1984097. This nose was used on starters for 1970-82 Corvettes with automatic transmission and 14", 168 tooth flywheels/flexplates. Photos of an NOS GM #1984097 [not for sale] are shown below.

The cast iron starter nose was used on all applications with 14", 168 tooth flywheels/flexplates except those mentioned above. This nose was originally GM #1965721, later GM #1969309, and finally GM #1984098 which was discontinued without supercession in July, 1994.

I should also mention that the above referenced starter noses were widely used on starters across all GM car and truck lines.

Finally, if you have a 1969 L-71 with THM-400 your application utilizes a 14", 168 tooth flexplate and requires a starter with the cast iron nose.


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[Kenneth K.]

Re: L71 starter motor attachment holes

Hi Joe-

Thanks for the details and accompanying photos. That also answers my question of why there are 3 tapped holes. Two of the holes for a straight bolt pattern and the 3rd hole for the offset pattern. I thought I saw a post that mentioned a 3 bolt starter. Is this true?.

Ken

[Joe L.]

Re: L71 starter motor attachment holes

Hi Joe-

Thanks for the details and accompanying photos. That also answers my question of why there are 3 tapped holes. Two of the holes for a straight bolt pattern and the 3rd hole for the offset pattern. I thought I saw a post that mentioned a 3 bolt starter. Is this true?.

Ken

Ken------


As far as I know, there was never a starter retained by 3 bolts to the block. I'm certain this was the case for all 1963-82 Corvettes. However, I suppose it's possible for some other application but none that I am aware of. I believe the 3 bolt tappings in the block are simply so that any block could accommodate any of the starter noses.

[Justin S.]

Re: L71 starter motor attachment holes

Why did Dave's responses disappear?

This happened on another thread as well.

[Owen L.]

Re: L71 starter motor attachment holes

Because the engine stand is so large, I opt for an engine cradle for storage. It bolts to the engine via the bell housing flange and each engine mount pad. No stresses on anything that it doesn't experience in the car. These are inexpensive (~$50), compact (footprint equals the dimensions of the block), and stable.

Mine looks similar to this one and it's held both a decked out 427 and 454:
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