billtool

During my TPS change out - I was smart enough to pull my throttle body and pay zero attn to there being a difference in the shape/threads of the front and back bolts. I succeeded in breaking one off into the motor when attempting to torque it to the factory prescribed 14lbs ft. Apparently in the wrong hole. Thankfully, God himself smiled upon me and saw fit to leave two threads protrudung, upon which I was able to find purchase and easily remove. Since apparently my skills at searching the CD WSM suck equally as much as my skills as a mechanic, I've got the following questions:
1. What are the part numbers of the two different style bolts?
2. Which bolts go in front and which in the rear?
3. Why make them different at all? (probably not in the WSM)
I'm no fastener engineer - but it boggles the mind that the PhD's at Porsche saw fit not to just put some M8 bolts or whatever in those holes and call it good. I mean the actual shape of the bolts are different. Not easily seen when you're blowin' and goin'...but clearly different.
Can I just go to the hardware store and buy the appropriate threaded bolt and put the damn thing in?

SeanR

one of those bolts looks really stretched out..

Lemme go see if I've got one here.


Edit.

They are standard m6 bolts. Jut checked what it is on the couple of intakes sitting around here. I hope you didn't mess up the threads.

billtool

Right...Then two of the bolts (including the one I broke) were stretched out in the exact same manner. I would be amazed that a grade 8 bolt would stretch vs just pulling the threads in aluminium.

SeanR

Just my thought, but that one elongated bolt looks like it bit in to the lower housing just fine, but stretched inside the throttle body. I think you will be just fine with new bolts.

billtool

I'll give it a shot. Thanks.

jon928se

Threads on the stretched bolt look like they are distorted to me.

billtool

Seemed to bolt in fine...we'll see