I was under the car on the weekend and noticed that one of the K member bolts is missing . It is on the passenger side towards the rear of the car. Basically where the rearward part of the A arm attaches. The bolt goes through kind of an "L" bracket.

Any idea what size these are and where you can order them? WOuld GM have them?

thanks.

 

it's a 12 mm bolt... (don't ask, just is)

11/16s fits.... about 3 inches wrong, I've had it out a few times recently... has a tapered end.... helps when you need to hammer it in...

 

So if they're M12 (aka 12mm) bolts, then how long are each of them?

Also are the bolts, actually bolts (which have a small section of non threaded shaft), or are they set screws (threaded all the way from the head to the end)?

I take it these should be grade 8 or 8.8 (aka 10.9 in metric)?

Si.

 

lots of non-threaded....

measure the width of where it connects and add 1/2 inch

don't have it in my hand, but it's about 3.5 inches

mine has funny markings on it, no grade markings that I've ever seen....

 

There was a thread on this not too long ago - someone posted a schematic showing all the bolt locations and if I'm not mistaken the bolts were of different lengths - torque was 120.

 

yea, all 3 are diffrent lengths. shortest in back, longest in front.

pull the bolt from the otherside, goto lowes, and they should have the correct metric bolts for the rear one there. they dont have the longer ones needed for the front 4 though

 

Any chance somebody could post the length of all 6 bolts???? Yeah I'm talking about real data for a change!

Anyone?

Si.

 

im planning to when i do my Kmember swap..... the date keeps getting pushed back though

 

lol.. here's some real data for you - I was just on the phone to a dealership and they could't tell me anything about them.

 

I just pulled the K-memeber out of my car. when I get home I will measure them and let you know...............jt

 

Did you get a chance to measure up these bolts? My k-member swap has been delayed though as the container was held back 3 weeks. Serves me right for trying to save some cash, by taking the slow boat.....

But still I need to know what these bolts are so I can order them in before I get stuck into the swap.

Si, :lala:

 

if all goes well, the Kmember and engine swap should be this weekend.

i didnt swap K members last weekend though.

 

Whoops, I completely forgot about that. I will try and get the measyrements today.................jt

 

Ok, Here ya go. There are three different lengths per side. One is 5" long, the second is 4" long, and the third is 2-1/4" Long but only 2" of it being threaded. Measurements are from end to end and included the head. All 3 have 10.9 on the head.......jt

Tried to post a pic but wont work. just look at the first pic in sig for pic of all three bolts with tape measure..........jt

 

Cool, thanks for the info......but which ones go where? front, back.......

 

 

Yeah great info! Thanks for the help in getting these details. Seems like I'll have to try a few different places to get these different lengths....

Cheers,

Si. :lala:

ps. Here's your picture :

 

side note:

with a tubular Kmember, all 6 are the same as the short one.

 

Ah! Thats kinda useful info! I've asked several times for info on what bolts are used for PA racing k members and have never before got a straight answer!

All I can say really is : :yourock: :yourock: :yourock:

Cheers,

Si.

 

GRP 7.039 - BOLT, FRT C/MBR - M12x1.75x115: This is the front bolt. 1991-1992: same

GRP 8.900 - BOLT, HFH - M12x1.75x90 10.9, POR, 37, THD 26.6 OD(AR): This is the middle bolt. 1991-1992: M12x1.75x89

GRP 7.039 - BOLT, FRT C/MBR - M12x1.75x31 10.9: This is the rear bolt. 1991-1992: M12x1.75x45

For 1982 to 1990:
Frt: P/N 14047913 ($3.84)
Mid: P/N 11514112 ($6.35)
Rear: P/N 14064097 (No longer available)

1991 and 1992:
Frt: P/N 14047913 ($3.84)
Mid: P/N 11514112 ($6.35)
Rear: P/N 10136881 (No longer available)

 

Great, the one I need is not available anymore Thanks for this info......awesome. I take it that for the rear bolt, which appears to have a "tip" on it that is not threaded, the 31mm excludes the head of the bolt and the "tip"???? So only the threaded part, right?

Would that "tip" serve any purpose? I could just get a shorter bolt completely threaded and do just the same, right?

 

I have some bolts from a 95 Formula K-member wich are short like the rear bolt on the thirdgen. I will try and compare them tomorrow...........jt

 

the tip makes it easier to install... other then that, it doesnt do anything.

in the two cars i put aftermarket kmembers in, we used high grade bolts from the hardware store.. as long as they're grade 10 or better you can use them... just dont goto home depot and get the ungraded, unmarked bolts that match.. thoes are soft and your asking for trouble.

btw, lowes does sell the correct size bolts.... however i dont recall the size... but Goumba T posted them above.

i usually go by the remove the bolts and compare method.....



heres where you can find info on grades: http://www.google.com/search?hl=en&i...grade+markings