So I pulled my intake and accessories off over a year ago with plans to do a quick cam install. In the middle of the process my son’s truck dropped a cylinder and all extra time and money went to that.

I now have the cam installed and have some mystery bolts that I’m hoping you guys can help me place as I am putting everything back together. Here are the first two. They go in or around the fuel rail. I appreciate any and all help.

thanks,
Joey.

 

TPS

 

Awesome. Thank you. I'll have some knew bolts listed soon. These are torx head bolts but they are flat instead of kind of rounded. I have 4 of them I believe. I can send a picture when I get home.

 

I said I had 4 of these but I actually have 5. Any ideas?

 

I don’t recognize those, engine parts that use torx on tpi. Fuel rail, tps ,intake to head, plenum
and runners, front accessory brackets on 89-92 tpi

 

I've looked all over my engine and engine bay, and I don't see any bolts like those. They look kind of hefty in your hand, not small like the fuel rail and TPS bolts. Are the seat belts installed in the car? They look like seat belt bolts that bolt into the floor.

 

maybe top bolts for the runners to plenum? Seatbelts are in car. The only things removed were front brackets, plenum, runners, fuel rail, intake, valve covers.

 

The runner/plenum bolts were originally black oxide button cap torx bolts, like the valve cover bolts, and there would be more than 5 of them. The head on those look like they might be the right size, and if you're not the original owner, then someone could've changed them in the past. Have you tried to screw them into the plenum to see if they fit?

 

What size Torx bit fits in the head?

 

From the size, they look like the runner to plenum bolts. However, like mentioned above, the original bolts were cap head torx, not square head. The previous owner changed them out for some reason. If they were a lot smaller, I’d say they are the TPS and TB top plate bolts. Unless, that is you have very very very small hands…lol!

 

They are bigger than the plenum/runner bolts. They are the same size as the intake and bracket bolts.

 

Could the bolts in question be for the intake manifold to cyl head? They look to be the right size. Of course, you need more than five.

Fred

 

Metric or SAE thread?