KingPin1094

iTrader: (12)

Not that it is a really big deal or anything, im just curious. Why does GM use these bolts (picture below)? Some of them were used to hold my coil packs on. and some were used to hold the coil pack bracket to the valve cover. Why? I searched and it seems all the LS1's came with those bolts.

KingPin1094

iTrader: (12)

okay it wont let me upload a photo. Its those 10mm bolts that bolt in, but are also threaded at the top as well.

Decadence75

iTrader: (17)

I'm not really sure but I hated them. My guess is that they had a crap ton of these from some period where they needed a bolt/stud that would also have something else bolted to the top of it and just re-purposed them. I picked up a set of stainless hardware from Potz on ebay for real cheap. Had the TB, MAF, TB sensors, coil, coil bracket and intake bolts all in a hex head stainless.

Beatdown Z

iTrader: (18)

On trucks, two of them are used for brackets.

KingPin1094

iTrader: (12)

Okay cause i really wanna change them out so they are all hex bolts. I just wanted to make sure there was no "special" reason they were used that i was unaware of.

RedHotG8

iTrader: (1)

They are used so the threads in the valve cover don't get stripped out.

KingPin1094

iTrader: (12)

how would that prevent that at all?

RedHotG8

iTrader: (1)

Because the nut is loosened and tightened to remove and replace the coil bracket leaving the threaded stud in the valve cover.

KingPin1094

iTrader: (12)

i was thinking thats how they were supposed to be used, but mine were not used that way. it was just bolted down without a nut, so if i had to remove the coil bracket id have to take it out anyway.

LOHRTBT

iTrader: (12)

Potz has a great product and price!

RedHotG8

iTrader: (1)

The previous owner must have put them in wrong. Since you don't have the nuts you might as well replace the studs with screws like the other guys did. Just be careful not to overtighten them. Some blue removable locktite will keep them from loosening up.

Decadence75

iTrader: (17)

This is a pic of what the OP is talking about. These are the standard bolts used to attach both the coils to the bracket and the bracket to the valve cover. It is neither a bolt nor a stud but some kind of in between. Sorry for the fuzzy pic, it was just a quick snap in the dark garage.

99Bluz28

iTrader: (35)

I think they're were used for the engine covers on the corvette motors

RedHotG8

iTrader: (1)

Yeah the head isn't threaded, it's a headed pin that a rubber grommet on the engine cover snaps onto.

Decadence75

iTrader: (17)

I think that the OP's reasoning was that why would GM use a bolt that holds on FRC in a vehicle that they do not make FRC for. In other words why stick us with a pointy useless bolt that just gets in our way and cuts up our arms for no reason.

KingPin1094

iTrader: (12)

Exactly!

FourG63 97GST

iTrader: (1)

yes, the corvette uses them for covers, they were in the parts bin is my guess.

spy2520

iTrader: (3)

I'm thinking it's probably because all ls1s were on the same assembly line, and the valve covers and coil brackets probably went on well before any vehicle specific parts (accessory drive, etc) were put on in the line.

98cherrySS

iTrader: (2)

My wiring harness has plastic clips that anchor to those bolts.

garygnu

mite the dowel on top make it easier to get a socket onto the bolt ?