2G Cam shaft with no thread for 2GB CAS?

PXHero · Jul 16, 2026

This seems like a newbie type of question, so I'm asking here after searching for most of the morning...

My aftermarket intake cam shaft has no thread for the 2GB CAS bolt, what are my options? Buy new cam shafts, take it to a machine shop? *edit: 7 bolt, 99 GSX if it matters.*

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r3dmak · Jul 16, 2026

Had same issue with NOS hks cam, had to be taken to a machine shop for a thread.

Jacob5se · Jul 16, 2026

r3dmak said:
Had same issue with NOS hks cam, had to be taken to a machine shop for a thread.

Did the same with my HKS 264's.

PXHero · Jul 16, 2026

Sounds like I need to start looking for a local machine shop... Thanks all!

FIBA M - EC17PSE · Jul 16, 2026

Yeah have to be drilled and tapped. Just had to do this for a customer recently on their HKS camshaft

Galant665 · Jul 16, 2026

Center of the cams are pretty soft. Not hard to drill. Bolt should be a 8 x 1.25. Have drilled and done many of them in the 2g days.

PXHero · Jul 16, 2026

Beauty! So glad I didn't order the wrong thing *cough* 20 years ago *cough* only to have it bite me now...

jdxnc · Jul 16, 2026

As said, you can do it yourself if you have the tools, it's easy.

PXHero · Jul 16, 2026

I've definitely got drills and a tap/die set... I may not have the skills, though... How square to the shaft does it need to be? 3D printer may need to go whirr and print me a drill guide...

import solutions · Jul 20, 2026

I did that even with cam installed just about 3 weeks ago

PXHero · Jul 20, 2026

import solutions said:
I did that even with cam installed just about 3 weeks ago

Interesting... How did you keep the metal chips getting into the engine?

PXHero · Jul 23, 2026

And done!

I printed up a drill guide that did wobble a bit as time went on, but kept the drill square for the start and long enough to not end up with an oval... I ended up going in about 1 3/8" beyond where the chamfer starts near the CAS cup "ears." Tapped to 8x1.25 as directed.

Now I hope I got it positioned right for TDC... LOL

Thanks everybody!

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19Eclipse90 · Jul 23, 2026

When you get to it, the paint mark goes to the rear / intake / firewall side when aligning the cup when at TDC, just FYI. (It’s ~180 degrees out in your picture.)

Justin DuBois · Jul 23, 2026

Drill and tap by hand - No really. If you leave the cam gear attached, stand cam on solid ground on a piece of cardboard to protect the cam gear. The end you want to drill will be about knee height, stand on the gear with your foot, and drill straight down with the correct tap size - mark the depth on the drill needed with a bit of masking tape. Use a little tap oil to cool the drill bit, and clear the shaving often. Blow out all the shavings, and then use a tap and go to work - same idea, but use a hand tool to tap instead of a power drill.

99dsmer4g63 · Jul 23, 2026

This thread has pictures of the cam orientation at TDC.

Resolved - 2g Camshaft Sensor Positioning Cylinder Install

hey im installing the cam angle sensor but i dont know which way to put it, it can go either way 180 degrees, and the two 'fins' on the rotating part has different sizes.I searched and read (if i didnt misunderstand) that theres supposed to be an indent on the fin and on the housing, but i...

www.dsmtuners.com

-Daniel

PXHero · Jul 23, 2026

19Eclipse90 said:
When you get to it, the paint mark goes to the rear / intake / firewall side when aligning the cup, just FYI. (It’s 180 degrees out in your picture.)

My hero! The best I've found searching online is "if it doesn't work one way, flip it 180."

Justin DuBois said:
Drill and tap by hand - No really. If you leave the cam gear attached, stand cam on solid ground on a piece of cardboard to protect the cam gear. The end you want to drill will be about knee height, stand on the gear with your foot, and drill straight down with the correct tap size - mark the depth on the drill needed with a bit of masking tape. Use a little tap oil to cool the drill bit, and clear the shaving often. Blow out all the shavings, and then use a tap and go to work - same idea, but use a hand tool to tap instead of a power drill.

Great advice! Sadly, I lack cam gears at the moment... I drilled and tapped mine while it was still installed... Cleaned it out using a vacuum every couple presses with the drill, hand tapped with plenty of oil, and went after everything with a magnet to pick up anything I may have missed with the vacuum...

99dsmer4g63 said:
This thread has pictures of the cam orientation at TDC.

Resolved - 2g Camshaft Sensor Positioning Cylinder Install
hey im installing the cam angle sensor but i dont know which way to put it, it can go either way 180 degrees, and the two 'fins' on the rotating part has different sizes.I searched and read (if i didnt misunderstand) that theres supposed to be an indent on the fin and on the housing, but i...
www.dsmtuners.com

-Daniel

It sure does! I have no idea how I missed this in my searches...

PXHero · Jul 24, 2026

And now it's even in the correct orientation!

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import solutions · Jul 25, 2026

PXHero said:
Interesting... How did you keep the metal chips getting into the engine?

Put towels, taped , and vacuum chips also the tap was with grease

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2G Cam shaft with no thread for 2GB CAS?

PXHero

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r3dmak

Jacob5se

PXHero

FIBA M - EC17PSE

Galant665

PXHero

jdxnc

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import solutions

PXHero

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Attachments

19Eclipse90

Justin DuBois

99dsmer4g63

Resolved - 2g Camshaft Sensor Positioning Cylinder Install

PXHero

Resolved - 2g Camshaft Sensor Positioning Cylinder Install

PXHero

Attachments

import solutions

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