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Old 10-20-2003, 10:20 AM   #26
vile
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Quote:
Originally posted by VetteVert
Don't have the part numbers with me. It is a package of 2 spark plug arresters (sp?). They are the "Help!" brand in the red blister packs. I seem them at all of the crappy parts stores (autozone, pep boys, advance, etc.). They are almost sealed on one end so I had to drill it out. It was also tapered down a little too small inside, so I slowly went up in size (up to 1/2" I think, will check) on the drill bit until I was satisfied. I bolted both together and into my down pipe. Then installed O2 sensor.

VV
can you pics of these spark plug arresters(package), and what you did?

i'm slow, need drawing, use crayon please, hehe
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Old 10-20-2003, 10:25 AM   #27
VetteVert
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Didn't take pics before I installed unfortunately. Will try and get some installed pics. Basically what the arrester is, is a male/female adaptor with one end partialy sealed. The idea is for the spark plug (with same thread pattern as O2 sensor) to screw into one end (female end obviously), and to screw the male end into the head where the spark plug would go. All I did was drill out the inside so it was larger. Screwed the male end of 1 into the female of the other, then screwed the new combo into the downpipe. This resulted in an extension with a female opening to accept the sensor. Hope that made sense...it is REALLY simple, but hard to explain

VV

Quote:
Originally posted by vile
can you pics of these spark plug arresters(package), and what you did?

i'm slow, need drawing, use crayon please, hehe
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Old 10-20-2003, 11:10 AM   #28
vile
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one more question, which size of arrestor(anti-fouler) did you use, 5/8" or 13/16"?
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Old 10-20-2003, 12:20 PM   #29
VetteVert
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Don't remember, but I would think only 1 of them would be 18mm. I'll check for sure tonight.

VV

Quote:
Originally posted by vile
one more question, which size of arrestor(anti-fouler) did you use, 5/8" or 13/16"?
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Old 10-20-2003, 11:22 PM   #30
WRXncrew
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Default Yes, 18mm threads for rear O2

The following is the Help! part# 42002 from Motormite. This will need to be modified by drilling a 1/2" hole through one so that the O2 sensor won't bottom out. With both pieces screwed together, the length is around 2". These are the 18mm tapered part, but there is also a 18mm flat mount style part# 42009. These can be purchased from any autoparts house, like Kragen, Pepboys, etc. Any place that carries the 'Help!' Motormite brand.
Attached Images
File Type: jpg o2moda.jpg (35.1 KB, 3714 views)

Last edited by WRXncrew; 11-05-2003 at 01:44 PM.
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Old 10-21-2003, 07:33 AM   #31
TopKatz
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did you use an "elbow" with these, or just like this?
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Old 10-21-2003, 07:35 AM   #32
VetteVert
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I used them straight out...but I used both of them. This setup looks exactly like the Godspeed design. No CELs yet.

VV

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Originally posted by TopKatz
did you use an "elbow" with these, or just like this?
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Old 10-21-2003, 07:36 AM   #33
TopKatz
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Does the stock 3rd cat provide enuff clearance to do this?
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Old 10-21-2003, 07:36 AM   #34
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Default Re: Yes, 18mm threads for rear O2

Quote:
Originally posted by WRXncrew
The following is the Help! part# 42002 from Motormite. This will need to be modified by drilling through one so that the O2 sensor won't bottom out. With both pieces screwed together, the length is around 2". These are the 18mm tapered part, but there is also a 18mm flat mount style part# 42009. These can be purchased from any autoparts house, like Kragen, Pepboys, etc. Any place that carries the 'Help!' Motormite brand.
Outstanding!, thanks to everyone who did the legwork for those of us (well, at least me!) who ain't so swift

-James
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Old 10-21-2003, 07:47 AM   #35
VetteVert
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I have no idea...I'll try to snap a shot of what it looks like on a Helix pipe to see if that will show how much clearance there is.

James: there's your part #s (I lost my blister pack)

VV

Quote:
Originally posted by TopKatz
Does the stock 3rd cat provide enuff clearance to do this?
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Old 10-21-2003, 07:52 AM   #36
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interesting information. the autozone down the road from me sells help brand, i'll have to pick up a pack.
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Old 10-22-2003, 09:14 PM   #37
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I picked up a pack today. Do I need to use something like
loc-tite when installing?

-john
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Old 10-23-2003, 12:32 AM   #38
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you don't really need to, but it couldn't hurt.
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Old 11-02-2003, 12:02 PM   #39
TopKatz
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I made an elbow type extendor, my CEL came on last night after 50miles.
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Old 11-02-2003, 01:54 PM   #40
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perhaps it made your sensor too far out of range in the other direction...?

VetteVert-
How big is the hole you drilled out to?
so far I have only drilled it out to 3/8" and I haven't had a chance to install it yet, and find out if it is wide enough.
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Old 11-02-2003, 01:56 PM   #41
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Old 11-03-2003, 01:32 AM   #42
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I've been running my CEL fix now for over 900 miles, no CEL even after driving on the freeway (always used to get CEL P0420 on the freeway).

The mod needs a half inch hole drilled completely through one, but keep the other spark plug non-fouler as is. NO elbow needed. You should clear all CELs after installing. I'm using the 42009 as a base (non tapered and has the washer), and the 42002 with the 1/2" hole drilled straight through.

If you get a CEL, it could be something other than the P0420 which is the rear CAT inefficiency code.
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Old 11-03-2003, 06:49 AM   #43
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1400 mi. here and no CEL yet...

I drilled mine out to 1/2"...that leaves just enough room for some exhaust to get to the sensor.

VV

Quote:
Originally posted by s_nold
perhaps it made your sensor too far out of range in the other direction...?

VetteVert-
How big is the hole you drilled out to?
so far I have only drilled it out to 3/8" and I haven't had a chance to install it yet, and find out if it is wide enough.
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Old 11-05-2003, 01:45 PM   #44
WRXncrew
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I'm curious to know if anyone here is using this fix on their '04 WRX or STI.
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Old 11-05-2003, 01:57 PM   #45
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Quote:
Originally posted by VetteVert
1400 mi. here and no CEL yet...

I drilled mine out to 1/2"...that leaves just enough room for some exhaust to get to the sensor.

VV
agreed. 3/8 isn't enough. 1/2 is the smallest that'll work.
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Old 11-22-2003, 12:40 AM   #46
CirrusWRX
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good stuff - will be looking into this tomorrow
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Old 11-24-2003, 10:23 PM   #47
R.C.Y.K.
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so VetteVert or WRXncrew, is that i need both 42002 and 42009 to finish or i can just use the 42002?
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Old 11-24-2003, 10:23 PM   #48
R.C.Y.K.
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so VetteVert or WRXncrew, is that i need both 42002 and 42009 to finish or i can just use the 42002?
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Old 11-24-2003, 11:01 PM   #49
Eskram
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I'm not sure if it would work or not with teh WRX (I have an electronic CEL fix or I'd try it), but when I had my catless Integra, I wrapped the rear O2 sensor in aluminum foil and zip tied out of the way. Never got a CEL in over 9k miles...
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Old 11-25-2003, 12:12 AM   #50
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You only need one or the other...there is a small difference in them, I can't remember exactly what it was...they should be next to each other...and if I recall...it is somewhat obvious what the difference was from one to the other... Make sure you get two of either one...and you will have to drill out the center so that the O2 sensor will fit...The MINIMUM diameter of the hole should be NO LESS THAN 1/2" you will have to drill both peices out for everything to fit.
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