Stainless idle screw upgrade
12-12-2010, 09:02 AM
#1
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Stainless idle screw upgrade
Well a while ago adjusting my idle i broke one of the adjustment screws, and walking around home depot i found the prefect replacement. Here is the broke screw.
So i went to home depot and bought 2 sets of these 10/32x 1in.(only needed one set)
Tools needed are 2.5mm allen wrench, 3mm allen wrench, and 8mm open ended wrench.
It's pretty straight forward, take old out put new in.
It's not a big mod in any way, just thought i'd post it incase anyone else broke a screw and was going to replace with stock set screw, these are much stonger than the stock screws and they look better.
So i went to home depot and bought 2 sets of these 10/32x 1in.(only needed one set)
Tools needed are 2.5mm allen wrench, 3mm allen wrench, and 8mm open ended wrench.
It's pretty straight forward, take old out put new in.
It's not a big mod in any way, just thought i'd post it incase anyone else broke a screw and was going to replace with stock set screw, these are much stonger than the stock screws and they look better.
12-15-2010, 07:03 AM
#2
One of those screws is for the dashpot is it not? I adjusted the one that contacts the dashpot as I suspected it was messing up the throttle plate relapse. Seemed to help a bit for me.
Last edited by 99blackSE; 12-15-2010 at 07:06 AM.
12-15-2010, 09:10 AM
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I'm going to guess that Toyota didn't plan on using an SAE threaded component there.
Fortunately, 10-32 is a little smaller (4.95mm) than the m5x0.8 Toyota used, so you were able to get it in. But since it is smaller than design, you might have an issue with it vibrating loose. Who knows?
My local Ace Hardware has a stack of trays with "unusual" fasteners, including m5x0.8 - 25 button-head stainless. (And lots of other metric sizes) You might be able to wait and see, but since the 32 pitch isn't quite right (0.79mm) it's not doing the threaded part of the throttle arm any good.
Fortunately, 10-32 is a little smaller (4.95mm) than the m5x0.8 Toyota used, so you were able to get it in. But since it is smaller than design, you might have an issue with it vibrating loose. Who knows?
My local Ace Hardware has a stack of trays with "unusual" fasteners, including m5x0.8 - 25 button-head stainless. (And lots of other metric sizes) You might be able to wait and see, but since the 32 pitch isn't quite right (0.79mm) it's not doing the threaded part of the throttle arm any good.
12-15-2010, 10:39 AM
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Ya, i would recommend that you get the right metric bolt for that application and i hope you put a little dab of anti-seize on the bolt, because dissimilar metals love to seize and/or corrode together.
12-15-2010, 01:11 PM
#5
Looks like the same screw to me, that is the one that contacts the dashpot.
From 4Crawler:
Dash Pot:
The GREEN CIRCLE shows the dash pot (DP) which is there to slow the closing of the throttle to prevent backfiring. It consists of the round air bellows, a spring loaded plunger, and the air vent line that attaches to the fitting at the base of the bellows. The vent line has a check valve in-line and an air filter to keep dirt out. The check valve lets air into the bellows then the throttle opens and extends the plunger. When the throttle closes, the stop screw contacts the plunger and pushes it in. The check valve closes to slow the air escaping the bellows and thus slow the closing of the throttle.
The GREEN CIRCLE shows the dash pot (DP) which is there to slow the closing of the throttle to prevent backfiring. It consists of the round air bellows, a spring loaded plunger, and the air vent line that attaches to the fitting at the base of the bellows. The vent line has a check valve in-line and an air filter to keep dirt out. The check valve lets air into the bellows then the throttle opens and extends the plunger. When the throttle closes, the stop screw contacts the plunger and pushes it in. The check valve closes to slow the air escaping the bellows and thus slow the closing of the throttle.
Last edited by 99blackSE; 12-15-2010 at 01:15 PM.
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