Addendum To Previous EGR Valve Cleaning Methods

Here's some good repair guides for your Tercel :) Look here for help first!
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ARCHINSTL
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My tercel:: Goldie is a 1986 SR5 attualmente con Weber/also owned the first T4WD in STL in late '82
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Addendum To Previous EGR Valve Cleaning Methods

Post by ARCHINSTL » Wed Jan 11, 2006 12:42 am

OK - I will add my two cents to the Great EGR Valve Cleaning Adventure. While takza's is the seminal literature from 2004, I do have a few additions to the procedure.

Apart from the illustrations, which (I think) are self-explanatory, I will add that I wholeheartedly agree that the cleaning of the gasket from the manifold mount is a real PITA; the easiest way to access it is after the removal of the carburetor. In lieu of a dedicated gasket scraper, I used a sharpened, non-flexible, "thick" putty knife, and then cleaned up the surface with a razor blade scraper.

The bulk of the hard carbon deposits were removed with ice picks, various screwdrivers and even various sizes of drill bits; this stuff is rock-hard, and my valve was totally blocked. The "tools" in the photos can only be used after 99% of the deposits are removed. The SIS casing and brake cable casing shown can be scrounged from a bicycle store; probably used material can be gotten for free, but if new material is wanted, it's only a few bucks.

I would also add that the second time I cleaned the valve, I used regular oven cleaner on the intake pipe and on the valve itself. No harm was done, and a lot more carbon was thereafter flushed. Note that this oven cleaner procedure was done after using the various scouring tools in the photos. I repeated the oven cleaner method a number of times, until the water flushing fluid came clear. Note also that this method may be harmful to the diaphragm if there is a leak in the valve's shaft; of course, if this is the case, the valve is probably shot anyway.
Tom M.
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Last edited by ARCHINSTL on Thu Apr 13, 2006 7:56 pm, edited 2 times in total.
T4WD augury?
"Oh, do not ask, 'What is it?' Let us go and make our visit."
T.S. Eliot - "The Love Song of J. Alfred Prufrock"
"Now and then we had a hope that, if we lived and were good, God would permit us to be pirates."
Mark Twain

takza
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Post by takza » Wed Jan 11, 2006 3:12 am

In the annals of literature...this is surely a milestone...bravo....bravo!!!!

And the graphic design is very impressive. :D

Should I even need to mention a nomination for the end of the year T4WD posting contest?

----

....the competition is getting fierce! Grrrrrrr :mrgreen:
Give a boy a gun-give a biatch a cell phone-and pretty soon you almost got yourself a police state.

Orwell said: War is peace! Freedom is slavery. Ignorance is strength...

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waynehoc
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Post by waynehoc » Wed Jan 11, 2006 7:00 am

Excellent write-up ARCHINSTL, and great pics.

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ARCHINSTL
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My tercel:: Goldie is a 1986 SR5 attualmente con Weber/also owned the first T4WD in STL in late '82
Location: Kirkwood, a 'burb of St. Louis

Post by ARCHINSTL » Wed Jan 11, 2006 4:21 pm

Well - Thank You - Wish the red-faced emoticon had a smile instead of a frown, as I am embarrassed (just a bit, though...)
After doing this last July or so, I bought a vac pump, which, while handy, would not have permitted the sampling of old carbon in my mouth whilst sucking on the tube before clamping it...."Yes - a modest and unassuming vintage, that 1992 Conoco..."

Mine are not quite as technical or necessary as the Guides of some of you guys, but I figure that anything helps, and we are all in this together, right?
I have a couple more in the works...
Tom M.
T4WD augury?
"Oh, do not ask, 'What is it?' Let us go and make our visit."
T.S. Eliot - "The Love Song of J. Alfred Prufrock"
"Now and then we had a hope that, if we lived and were good, God would permit us to be pirates."
Mark Twain

takza
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Post by takza » Wed Jan 11, 2006 7:56 pm

Are you using a special prog or method to clean up those edges...or just filling a background color with WHITE?

I've tried that "collage" effect and cleaning up the edges of an object...took forever.
Give a boy a gun-give a biatch a cell phone-and pretty soon you almost got yourself a police state.

Orwell said: War is peace! Freedom is slavery. Ignorance is strength...

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ARCHINSTL
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Posts: 6369
Joined: Sat Apr 30, 2005 1:52 pm
My tercel:: Goldie is a 1986 SR5 attualmente con Weber/also owned the first T4WD in STL in late '82
Location: Kirkwood, a 'burb of St. Louis

Post by ARCHINSTL » Wed Jan 11, 2006 8:54 pm

takza -
"Special Program" ? ME ? Come on - It took me forever to find photobucket ! ! !
I do a lot of this on eBay to make the pix interesting - and it's kinda fun. No special program - just sucking part of a photo to a blank page, erasing the original page and moving the sucked-out portion back on. Then doing the same from another photo and adding it to the first blank page with the first sucked-out photo portion. I just use a white "color" in arrows (term?) and fill in the background. Yes, it is tedious, but I do think it's worth the effort.
My camera is a stone-age 2.3 MP $170 HP from 4 years ago (as an aside, my 7 year-old granddaughter just got one for Christmas - $70 and 3.4 MP). The software (term?) is what came with the camera - MGI Photosuite 8.1 - nothing complicated or fancy like Photoshop.
I also make my own greeting cards - some are cute and clever, and some are just grandpaw-corny (when carding the kids, I print a "head shot" of them in the address in lieu of their first name-they love it). I do some political cards as well...guess which camp? Hint - I ain't a mahout...
Tom M.
P.S. Sorry for the lack of proper technical terms - but I figured this stuff out on my own and never learned the correct lingo.
T4WD augury?
"Oh, do not ask, 'What is it?' Let us go and make our visit."
T.S. Eliot - "The Love Song of J. Alfred Prufrock"
"Now and then we had a hope that, if we lived and were good, God would permit us to be pirates."
Mark Twain

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Post by T-Bone » Fri Jan 13, 2006 10:13 am

nice writeup, i will be sure to follow it when i go to clean out my EGR system.

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Post by T-Bone » Fri Jan 13, 2006 10:16 am

nice writeup, i will be sure to follow it when i go to clean out my EGR system.

Typrus
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Post by Typrus » Fri Jan 13, 2006 1:45 pm

Awesome write-up. I'll have to try that, assuming I get the opportunity.
My digi is a 1.8MP that cost $500 about 8 years ago... Essentially, a first-gen Digi. Its an HP and it works great. Just check out my shots of my Terc in Typrus' Tercel...
RIP 10-07- 1984 Toyota Tercel SR5 4wd Wagen 6 speed

RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed

1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed

1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew

takza
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Post by takza » Sat Jan 14, 2006 7:22 am

Here are 3 FREE graphics progs that work for me...Windoze....you might like them....

MWSnap...good capture prog...catch those graphics before they get away!

XNView...good slide show....resize....reformat...batch...

Pixia...can do a lot of stuff...just have to figure out HOW....
Give a boy a gun-give a biatch a cell phone-and pretty soon you almost got yourself a police state.

Orwell said: War is peace! Freedom is slavery. Ignorance is strength...

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Typrus
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Post by Typrus » Thu Jan 19, 2006 6:32 pm

Pulled the EGR valve off the 84's engine......... 100% plugged at the intake. After drilling some of this out, and realizing I dorked up the passage walls :oops: I went through with a good soaking of Deep Creep. I swabbed some gunk out with Q-Tips, then I went and ripped a front brake assy off of one of our trashed bikes. I frayed the ends and drilled the carbon out as best I could. Massive amounts of carbon came from the valve, let alone the big tube.

Why should I fix this thing on my 84/86? If it too is 100% plugged, what is it hindering and what is it helping? I can't imagine re-introducing that much sooty carbon to the cylinders is a great idea, but I also can see that the hot EG may help fuel vaporization, though lowering O2 content.
RIP 10-07- 1984 Toyota Tercel SR5 4wd Wagen 6 speed

RIP 04-05- 1986 Toyota Tercel SR5 4wd Wagen 6 speed

1st Terc- 1987 Tercel SR5 4wd Wagon 6-speed, Sadly cubed

1985 Tercel Standard 4wd Wagon w/ 3-speed auto, Living a happy life in Boulder last I knew

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