GM Starter Options

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GM Starter Options

Postby zeke » Tue May 20, 2014 12:39 am

Our cars came with what is known as the Delco 5MT starter. The 5MT starter came in various case/armature lengths and is identifiable by the straight field case. It was a decent starter with the longest case but a better choice is the larger, stepped field case 10MT starter used extensively on gm cars and trucks for a long period of time.

This starter fits in place with a slight trim of the inspection cover starter opening. The 10MT came in a low and high torque version. The high torque model has a larger diameter armature core and thinner field coils than the low torque model. The field coils have two equal diameter copper tabs coming out of the field case where a copper spacer connects it to the solenoid output. If you see a 10MT starter that has two different thickness tabs, it means it has a set of field coils that use two shunt coils to limit the motors rpm and two torque coils, these are not what you want. Two same size tabs means it has 4 torque field coils and is much stronger. A back brace from the end plate thru bolt to the engine block and a solenoid heat shield is a good plan with this starter.

If you want to go the permanent magnet gear reduction route, there are a couple options. A long time ago, a company called Hamburger made a chevy drive end housing for a hitachi style starter and these are ok. Lots of torque but it uses a plastic shift lever and plastic sun gear.

A better option is the nippondenso style PMGR starter. These things are bulletproof with metal sun gear / lever / ball bearings and the only thing that wears out are the solenoid contacts which are replaceable.
Attachments
delco5mt.jpeg
Stock Delco 5 MT
delco5mt.jpeg (57.54 KiB) Viewed 514 times
10mtht.jpg
Delco 10MT
10mtht.jpg (89.27 KiB) Viewed 514 times
hitpmgr.jpg
Hitachi style
hitpmgr.jpg (18.67 KiB) Viewed 514 times
densopmgr.gif
nippondenso
densopmgr.gif (9.52 KiB) Viewed 514 times
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Re: GM Starter Options

Postby marco_1978_spyder » Wed May 21, 2014 7:55 pm

Hey thanks for this. I have about 7 GM starters, some good some bad. I was noticing the difference in case sizes. Seems I have a few 10MT's.

I've been having lick with a Hitachi style one that I had to replace the pinion gear on.
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Re: GM Starter Options

Postby zeke » Sat Dec 15, 2018 11:05 pm

Finally found some good shots of the Nippon Denso starter.
Attachments
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47354963_2054902974570547_758787160605196288_n.jpg (113.11 KiB) Viewed 113 times
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47378655_2054903164570528_4347683582857183232_n.jpg (140.84 KiB) Viewed 113 times
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Re: GM Starter Options

Postby Smiley » Fri Dec 21, 2018 8:44 pm

Some people have used an oem small starter from the early 90’s GM trucks.
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Re: GM Starter Options

Postby cjbiagi » Fri Dec 21, 2018 10:29 pm

This is the one I used. I also fabbed up a metal heat shield as the Hooker 2135 headers run right underneath and along side of it.
Attachments
Starter.jpg
Starter.jpg (17.89 KiB) Viewed 71 times
heat shield2.JPG
heat shield2.JPG (125.15 KiB) Viewed 67 times
Clyde.........75 Monza 2+2
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Re: GM Starter Options

Postby zeke » Sat Dec 22, 2018 9:44 am

That's a SD210 Delco PMGR, they work also but are an inferior design compared to the ND starter.

Nice heat shield Clyde
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