Thread: Problems

Yes, the studs are the same. On that nut. It's a specific nut, 13mm with almost no shoulder. This allows it to fit into the hole. Many other nuts on the engine are the same, but have a big shoulder. I have ground off the shoulder of a normal nut to use it in that position when the nut has become lost.

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If you look at the size of the stud vs exhaust ones, you'll see why it won't fit.

That stud IIRC is a M10 by 1.50 thread. Find yourself a 13mm nut with the M10 hole, then grind the shoulder off it. There's maybe only two 13mm nuts with an M10 hole on the entire car. I don't know what the nut comes from besides the tensioner, but I know I've had 2-3 when in a jamb that were in my piles of spare parts. Keep in mine..100's of cars roll through here.

IMO it's easy to find. Hit any JY where there's a GTP, Regal GS, Impala SS with SC or Monte SS with SC.

Any W body car with an sc has this nut.

Ps..bring your 13mm socket with you.

A supercharged car has no BBV, that's a turbo thing.

The BCA aka Boost Control Actuator is held to the SC with two 10mm bolts. They are about 3/4" in length. FWIW if you took pics of all your spare bolts, we could tell you exactly where to put which bolts.