Idle stop screw size?

[havlc2u]

Hello
I been having idle issues I noticed yesterday my idle stop screw was in
place this morning I was checking out my TB and noticed that it is now gone.
Does anyone know what size this screw is. Not sure if that is the correct name its the screw that stops the throttle from going closed all the way I do believe.


thanks

 

[jpmxrider489]

The screw your talking about is the BISS screw. Your probably having a boost leak. There is also an O ring that goes on it. The o-ring for the biss screw is MD608806. The biss screw is MD614948. The cap that goes on top of the biss screw is MD614532.

 

[niddydsm]

The screw your talking about is the BISS screw. Your probably having a boost leak. There is also an O ring that goes on it. The o-ring for the biss screw is MD608806. The biss screw is MD614948. The cap that goes on top of the biss screw is MD614532.

wrong information.... he is talking about the screw that keeps the throttle open its basically a stopping point for the throttle.

 

[havlc2u]

wrong information.... he is talking about the screw that keeps the throttle open its basically a stopping point for the throttle.

So anyone know the size of this screw?

 

[bryanwheat]

So anyone know the size of this screw?

I will measure the one in my tb when i pull it off tomorrow to replace the seals.

 

[havlc2u]

I will measure the one in my tb when i pull it off tomorrow to replace the seals.

Thanks You rock man.

 

[bryanwheat]

Well i've got good and bad news. I was able to measure the diameter of the screw which is 5mm. The thread pitch i was not able to determine. It is very very fine thread. My pitch gauge didn't have anything that fine. I am assuming that it is .5 or finer. I would go to the hardware store and buy a few and see what you can get to fit.

 

[NHerron]

Bryan I was given this huge thread pitch set which has more gauges I can even count...it might be able to identify it. I'll check back in about an hour.
Whitworth and Metric Screw Thread Pitch Measure Gage | eBay

 

[bryanwheat]

Bryan I was given this huge thread pitch set which has more gauges I can even count...it might be able to identify it. I'll check back in about an hour.
Whitworth and Metric Screw Thread Pitch Measure Gage | eBay

Holy shit, that thing is outrageous. Mine has like 8 different sizes at most, .

 

[NHerron]

Good thing I have good eyesight still, I forgot how fine that thing was haha

Like Bryan said it's 5MM diameter. I found it to be 0.5MM thread spacing and 27MM in length.
So 5MM x 0.5MM x 27MM

Around here I would be hard pressed to find a good assortment of standard metric sizes let alone weird thread pitches, and well I don't know if you're able to find it generically so I'll add the part number in case

Screw- MD614304
Nut- MD614305

I actually cheated and got the nut P/N from this thread because the parts program was getting mixed up with another nut...

 

[havlc2u]

Good thing I have good eyesight still, I forgot how fine that thing was haha

Like Bryan said it's 5MM diameter. I found it to be 0.5MM thread spacing and 27MM in length.
So 5MM x 0.5MM x 27MM

Around here I would be hard pressed to find a good assortment of standard metric sizes let alone weird thread pitches, and well I don't know if you're able to find it generically so I'll add the part number in case

Screw- MD614304
Nut- MD614305

I actually cheated and got the nut P/N from this thread because the parts program was getting mixed up with another nut...

Thanks guys