Grade 8 Starter Bolts?

[partime]

Can you replace the starter bolts with grade 8 bolts. If you can what is the torque spec. Thanks

 

[91W350]

Just go buy starter bolts. They are knurled and need to be the correct length. I bought some at a parts store, had better luck just buying the original stuff from GM. I started putting in new bolts anytime I have the starter rebuilt.

 

[Barneyszoo]

Yes get GM starter bolts they have a sholder and knuris up by the head the help aline the starter so it dosen't grind on the flex plate.

 

[Mudstone]

other thought is that block may break before bolts do. this is from reading in other threads.

 

[partime]

Thanks guys you just saved me time .....And a head ache

 

[Matt65]

If it were me I would only use starter bolts with factory Tq. I would not use a grade 8 at all.

 

[acmunro]

They are metric. I think the GM ones are stamped 9.8 If you get GM starter bolts you will need to add a washer to them. I had the joy of removing a broken starter bolt just yesterday.

 

[Keith_J]

If they break, then you have a massive pain to drill for the extractor. That was a nice 4 hour job a few months ago with stock bolts.

Ever try drilling a grade 8 bolt? There isn't anywhere to get a mag base drill attached, then you have to CENTER the drill in the bolt, not an easy task if broke off flush. And they never break off square. Hopefully they break off below flush so you can use centering bushing to get the hole started square and center.

 

[Barneyszoo]

I changed to cap screws (Alien head bolts) there rated at 180,000 psi, on some mechieney, but when they break the head pops off and your left with a nice stud to get some vice grips on or you can weld something to it and get it out. But I make no claimes. And you have to use the right lock washers.

 

[davo727]

Do you know the size , thread pitch and length of them please?

Thanks, Dave

I changed to cap screws (Alien head bolts) there rated at 180,000 psi, on some mechieney, but when they break the head pops off and your left with a nice stud to get some vice grips on or you can weld something to it and get it out. But I make no claimes. And you have to use the right lock washers.

 

[four_by_ken]

Do you know the size , thread pitch and length of them please?

Thanks, Dave

I am wondering the length of them also. Had one fall out yesterday on the way home sometime.
Need to get another.

 

[Warthog]

Gm #15544950
nsn - 5306-01-227-9085

You can order them from most parts houses in quanity. GM stealerships stock them, ebay has them listed. Even the HELP! brand at the parts houses will work. You do have to buy two packages as they come with a short and long bolt.