IS this stupid or true?
White Comet
Joined: Jan 2002
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From: Orange County
Pretty in depth discussion on this from almost a year ago in the archive of this section or 3rd or maybe just floating around in one of the two open forums. Anyway, I think mazdaspeed7 partakes in it as well. I think you'd find it informative.
I R SAD PANDA W/O BAW
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From: bay area
Senior Member
Joined: Apr 2003
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From: New Idaho
Anyone clean the inside of the motor while it's running with water
Um, am I reading this right?
Anyone clean the inside of the motor while it's running with water
"Water"......Clean inside motor while running.....Hmmm okay.
Yeah I guess I am.
Errrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr.
Why am I here ?
Joined: May 2002
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From: Boston, MA
I remember hypntyz7 (aka rotaryresurrection) talk about doing it regularly. There may even be some kind of write-up on it.
Search for his posts.
Hugues -
Search for his posts.
Hugues -
Last edited by hugues; Jan 21, 2004 at 10:21 AM.
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Really. Reference to this has been made before.
Originally posted by hypntyz7
Personally Im a fan of redlining any car I drive (that isnt being broken in from a rebuild or just had a used engine installed that week) once per driving session, be that once per day, once per week, or 5 times a day.
Now, about this maintenance debate. I am personally a fan of water injection. Not the type turbo guys run to keep intake temps down, but the type you do in your driveway as a maintenance procedure. Find a vacuum line or lines (teed together) that feed both the front and rear rotors, grab the throttle and rev the engine up to 4k or so, and dip the hose in a jug of water and let it drink. The water gets pulled in, hits the rotors and turns to steam, and takes carbon (slowly) with it.
If you're starting with an original/old used engine, Id do this 3-4 times weekly for about a month to clean as much as you can out. I'd also do 2-3 gallons per treatment. From then on, once per month. IF Im maintaining a rebuilt engine, I do this once per month or once per thousand miles to keep everything clean inside.
I have torn down engines where I had previously done this treatment, and they are always very clean, if not carbon-less altogether. The water treatment, along with straight premix, would result most likely in a rotary engine that lasted over 200k miles as the rule, rather than the exception.
Now, about this maintenance debate. I am personally a fan of water injection. Not the type turbo guys run to keep intake temps down, but the type you do in your driveway as a maintenance procedure. Find a vacuum line or lines (teed together) that feed both the front and rear rotors, grab the throttle and rev the engine up to 4k or so, and dip the hose in a jug of water and let it drink. The water gets pulled in, hits the rotors and turns to steam, and takes carbon (slowly) with it.
If you're starting with an original/old used engine, Id do this 3-4 times weekly for about a month to clean as much as you can out. I'd also do 2-3 gallons per treatment. From then on, once per month. IF Im maintaining a rebuilt engine, I do this once per month or once per thousand miles to keep everything clean inside.
I have torn down engines where I had previously done this treatment, and they are always very clean, if not carbon-less altogether. The water treatment, along with straight premix, would result most likely in a rotary engine that lasted over 200k miles as the rule, rather than the exception.
Last edited by silverrotor; Jan 22, 2004 at 05:55 PM.
. Does anyone else have experience with this (I would hate to **** up my engine)?
Full Member
Joined: Nov 2002
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From: BC, Canada
Originally posted by ilike2eatricers
https://www.rx7club.com/showthread.p...threadid=33778
https://www.rx7club.com/showthread.p...threadid=33778
wow, who would have thought you would put water in your motor on purpose... wow
thats jus sweet.. is there no negative effects.. Doesnt seem like any have come up in that thread..
damn I wish i knew about this when my old 7, I couldnt get it started because i think there was just massive carbon build up, and the atf trick wasnt workin
Defected to the dark side
Joined: Aug 2003
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From: toronto
Originally posted by SpeedFreak03
ok I hope this doesnt sound stupid...but how come it doesnt hydrolock (or do rotarys not hydrolock)? sorry for the n00b question...
ok I hope this doesnt sound stupid...but how come it doesnt hydrolock (or do rotarys not hydrolock)? sorry for the n00b question...
So i'm guessing this is the infamous water trick? Cool!
Im gonna give this a try when spring comes around.
Just out of curiousity, has anybody screwed this up yet? If so how badly?
Defected to the dark side
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From: toronto
Originally posted by Templeswain
LOL! I don't know but, um, I'd say when the **** starts rollin it starts rolling down hill quick.
LOL! I don't know but, um, I'd say when the **** starts rollin it starts rolling down hill quick.
I do itwith my escorts once in a while, take the heads off and you can definately see a difference between the one you did it too and the one you didnt. nice and clean 
to do this, you unplug the big vacuum line for the oil injectors and connect another piece of line to it and put that into the container of water, and it sucks it right in. you much hold the throttle open a bit or it will die. this helps motors that have been sitting and have stiff or stuck seals.
Originally posted by rexman13b
i don't think i would try it with piston engines. i've heard it can lock them up
i don't think i would try it with piston engines. i've heard it can lock them up
Other thing you can do is heat the water up and when it is already steaming start your engine and let the engine take in the steam.