Steam Cleaning Engine via UIM
09-12-10, 04:00 PM
#101
why does this have to turn into a pissing match? i already stated that the car should take breaks between each injection treatment of about half a quart of water at a time. i have seen people suggest a whole gallon of water for the treatment with no mention of letting the car cool off periodically which is wrong, that is far too much to do in a single treatment.
none of my statement is incorrect, i said the exhaust could likely have been severely overheating which could melt the plastic but i added the possibility that it could have been popping flames out the back as well, either or.
the treatments are also very hard on the cat, it needs to cool off before it melts down internally.
none of my statement is incorrect, i said the exhaust could likely have been severely overheating which could melt the plastic but i added the possibility that it could have been popping flames out the back as well, either or.
the treatments are also very hard on the cat, it needs to cool off before it melts down internally.
09-12-10, 04:26 PM
#102
why does this have to turn into a pissing match? i already stated that the car should take breaks between each injection treatment of about half a quart of water at a time. i have seen people suggest a whole gallon of water for the treatment with no mention of letting the car cool off periodically which is wrong, that is far too much to do in a single treatment.
none of my statement is incorrect, i said the exhaust could likely have been severely overheating which could melt the plastic but i added the possibility that it could have been popping flames out the back as well, either or.
the treatments are also very hard on the cat, it needs to cool off before it melts down internally.
none of my statement is incorrect, i said the exhaust could likely have been severely overheating which could melt the plastic but i added the possibility that it could have been popping flames out the back as well, either or.
the treatments are also very hard on the cat, it needs to cool off before it melts down internally.
FWIW, I think this facination with water ingestion is misplaced. A decent AI system should, IMO, make it unnecessary.
09-12-10, 04:31 PM
#103
well, water injection isn't for everyone, some have stock cars which will have hiccups with the water injection even though it is a safety precaution but everything you add to a car can fail eventually.
cats can handle heat because they are made to, but excessive heat is another thing. the cats aren't supposed to glow red or yellow, ever. what makes cats fail? lean conditions which superheat the exhaust temps to act like a blowtorch on the cat and also overheating the case, as the case gets hotter it expands and unseals the core from the case and eventually allows the core to rattle around inside the cat and fracture as it cools down too rapidly. this is why precats fail so regularly, the main cats are much further downstream and have less heat expansion to deal with.
cats can handle heat because they are made to, but excessive heat is another thing. the cats aren't supposed to glow red or yellow, ever. what makes cats fail? lean conditions which superheat the exhaust temps to act like a blowtorch on the cat and also overheating the case, as the case gets hotter it expands and unseals the core from the case and eventually allows the core to rattle around inside the cat and fracture as it cools down too rapidly. this is why precats fail so regularly, the main cats are much further downstream and have less heat expansion to deal with.
09-13-10, 02:44 PM
#105
Yes, the car has a cat converter.
No, the owner didn't have an observer assisting him during the process. He didn't notice the flames from the bumper until after he had shutdown.
Yes, he was aware that the exhaust would get hot....just not this hot!
09-13-10, 02:53 PM
#106
It's not well known amongst RX-7 owners that Mazda recalled the RX-8 for "thermal" issues.
One or two RX-8's went up in flames when owners revved their cars for extended periods whilst stationary. Others suffered melted fuel tanks (the RX-8 tanks are plastic).
During the recall, Mazda changed the ECU software to prevent owners from doing extended high rpm runs whilst stationary (ie, no wheel speed input) and added extra heat shielding to the fuel tank.
It's a known fact that rotary engines produce high temperature exhaust gases.....owners need to be on their toes when doing extended high rpm engine runs with the car stationary.
One or two RX-8's went up in flames when owners revved their cars for extended periods whilst stationary. Others suffered melted fuel tanks (the RX-8 tanks are plastic).
During the recall, Mazda changed the ECU software to prevent owners from doing extended high rpm runs whilst stationary (ie, no wheel speed input) and added extra heat shielding to the fuel tank.
It's a known fact that rotary engines produce high temperature exhaust gases.....owners need to be on their toes when doing extended high rpm engine runs with the car stationary.
09-13-10, 03:06 PM
#107
i admit i didn't go back through the whole thread so i missed that point. the engine shouldn't be run at high RPMs during the treatment anyways though as it tends to void any of the effects of treatment. the car should be at low RPMs and stumbling a bit to catch up, telling you the water is overpowering the fuel mixture and not just going straight through without even touching the rotor faces.
09-13-10, 03:18 PM
#108
i admit i didn't go back through the whole thread so i missed that point. the engine shouldn't be run at high RPMs during the treatment anyways though as it tends to void any of the effects of treatment. the car should be at low RPMs and stumbling a bit to catch up, telling you the water is overpowering the fuel mixture and not just going straight through without even touching the rotor faces.
09-21-10, 08:38 PM
#110
is it a good idea to drive around while doing this? I did this today but got scared because the exhaust was smoking hot, luckily I stop it before anything burn. my question is: can I run the vacuum line to inside the car where I may have the bottle of water hanging there, then drive the heck out of it.?
is it safe doing so?
is it safe doing so?
09-23-10, 12:00 PM
#114
Not safe because you're driving and the engine would not be running well. Because the engine will be under load when your driving I think you would be likely to have less vacuum than just revving in neutral. Boost builds under load, and since boost is the opposite of vacuum I think that will be the issue. The higher you rev, the less vacuum you'll have and the longer it will take to suck the water. It won't be easy to drive around under 3k rpms anyways. I just think it will be difficult. Maybe you could do it driving around in a parking lot but I don't think you'll gain anything over doing it in your garage and it might be more difficult.
ok got it. 
06-20-16, 03:33 AM
#116
Is there any reason why we couldnt put say 2 or 3 gallons through to clean it out to the max?
Obviously will need to let the exhaust cool down numerous times throughout this treatment, perhaps do it over a span of a whole day.
But my main question is, could attacking the carbon in a big way like this in a relatively short timeframe cause any problems, such as bigger chunks of carbon to fall off which could potentially get jammed in the engine or something?
Obviously will need to let the exhaust cool down numerous times throughout this treatment, perhaps do it over a span of a whole day.
But my main question is, could attacking the carbon in a big way like this in a relatively short timeframe cause any problems, such as bigger chunks of carbon to fall off which could potentially get jammed in the engine or something?
Last edited by mikey13b; 06-20-16 at 03:40 AM.
06-23-16, 12:39 AM
#117
I've been doing this directly before each oil change, since 2011. I've still got excellent compression on the factory (never rebuilt) 1992 JDM engine, at approx. 72,000 miles now.
My method is to do one rotor at a time via vacuum ports on the UIM with engine fully warmed up. 900ml of water per rotor is enough. Then stop engine, wait 15 minutes and do the oil change.
A friend of mine can't stand to see me do it as he believes it would hurt the engine. But my engine is quite happy and healthy and his REW has blown up... I'll continue to steam clean it every oil change because it honestly does feel smoother afterwards.
My method is to do one rotor at a time via vacuum ports on the UIM with engine fully warmed up. 900ml of water per rotor is enough. Then stop engine, wait 15 minutes and do the oil change.
A friend of mine can't stand to see me do it as he believes it would hurt the engine. But my engine is quite happy and healthy and his REW has blown up... I'll continue to steam clean it every oil change because it honestly does feel smoother afterwards.
06-23-16, 07:05 AM
#118
Is there any reason why we couldnt put say 2 or 3 gallons through to clean it out to the max?
Obviously will need to let the exhaust cool down numerous times throughout this treatment, perhaps do it over a span of a whole day.
But my main question is, could attacking the carbon in a big way like this in a relatively short timeframe cause any problems, such as bigger chunks of carbon to fall off which could potentially get jammed in the engine or something?
Obviously will need to let the exhaust cool down numerous times throughout this treatment, perhaps do it over a span of a whole day.
But my main question is, could attacking the carbon in a big way like this in a relatively short timeframe cause any problems, such as bigger chunks of carbon to fall off which could potentially get jammed in the engine or something?
Last edited by Sgtblue; 06-23-16 at 07:07 AM.
06-24-16, 10:21 PM
#120
Not of ingestion but Howard Coleman has posted such pictures of his housings with and w/o AI. Can't find the thread now but it was pretty dramatic and convincing. I may look again tomorrow.
On a side note, BMW just started putting factory WI (rpm and load activated thru the ECU) on their boosted M4.
On a side note, BMW just started putting factory WI (rpm and load activated thru the ECU) on their boosted M4.
06-25-16, 10:40 AM
#121
Ok so I steam cleaned my engine twice today with a 45 min interval, 4 litres per rotor so 8 litres in total. After I did a rotor id take the car for a spin to let the exhaust cool down.
Car is running good. Is it running better or not i dont know, maybe its psychological but its feeling nice.
For some reason both times after I steam cleaned the front rotor and then took it for a drive it would blow a lot of white smoke for about 5-10, then it went away. But it never happened with the rear one. Any idea why that would happen?
Car is running good. Is it running better or not i dont know, maybe its psychological but its feeling nice.
For some reason both times after I steam cleaned the front rotor and then took it for a drive it would blow a lot of white smoke for about 5-10, then it went away. But it never happened with the rear one. Any idea why that would happen?
07-03-16, 03:11 AM
#122
Junior Member
Join Date: Jun 2016
Location: Melbourne, Australia
Posts: 8
Likes: 0
Received 0 Likes
on
0 Posts
I took some video last time I did an oil change, here are before and after videos I took with a boroscope style webcam.
https://youtu.be/YvanM1MdStA
https://youtu.be/_qRoxbtyEvg
My technique is as follows
- Allow engine reach operating temp
- Use a tee piece to connect the two upper intake vacuum nipples to a single long hose.
- Prepare a 5L bucket of water
- With the car running and the hose attached, lower the loose end of the hose into the water. Doing so will slowly suck up some water into the engine, and the engine will misfire and stumble. Increase the rpms to 3/4k to ensure that it doesn't stall. I allow the car to drink the water 15-20seconds at a time then give it a 30-40s to cool down.
Here are some screenshots showing the carbon reduction on specific parts of the rotor.
Before:
After:
Before:
After:
Last edited by BaconHunter; 07-03-16 at 03:29 AM.
Thread
Thread Starter
Forum
Replies
Last Post
cdn
2nd Generation Specific (1986-1992)
14
09-10-15 06:23 AM
