Subaru Upper Cylinder Cleaner

[TUF250]

Hi all,

I was reading on another forums about the subaru upper cylinder cleaner. They spoke very highy of the stuff. wanted to know peoples thoughts on using it and if its a waste of time on an rb25det?

[lookingforboost]

i use it on mine all the time love it makes the car seem heaps better to drive

[3LGODZILA]

wtf is it

[wasnt me]

its sprayed into the inlet plenum of the engine and left to soak for a while. Then engine is run to burn off all the crap.

[3LGODZILA]

i wonder if all the gunky crap will block up the valves/damage the bores

would like to hear an engine builders opinion, just like engine flush, sure the manufacture says its all great, but is it?

[wasnt me]

yeah not sure if i would like to use it. a better solution would be to run E85. that stuff cleans everything.

Edited August 1, 2010 by wasnt me

[Ultimategtr]

+1 to ^ haha.. or run WMI

[Adriano]

I use it, awsome stuff, however if the engine is old, the carbon on the ring lands can help the rings seal, this stuff will wash it away. Pretty lethal stuff though, especially what comes out the exhaust after

[eightsixboy]

I used to use this stuff all the time at my old work on the subaru's, it gets rid of and carbon build up around the valves and generally just cleans any gunk from the motor. Just don't inhale the exhaust fumes, insanely bad for you.

Its also really good for rusted or seized bolts and stuff, i used some when i did my turbo and made all the nuts/bolts easy to get of.

[lookingforboost]

subaru use it as part of there normal service, so i dont think that it would be bad for your car, it definatly makes my car feel more responsive after running a can through

[DAS KAMU]

i used it on the gtr and it ideled very strangley for the rest of the day

but came good at night

and those fumes ------------------------- do not risk breathing it in its like aids floating in the air

Edited August 1, 2010 by DAS KAMU

[MBS206]

It's actually the PERFECT way to clean out the IACV.

Put it down the pipe that goes to it and open up!

Works a charm, and once it has cleaned everything out the cars normally idle much smoother once they've relearnt how to.

After doing a clean with it, it is often a good idea to reset the manual idle, and then reset the ECU so it can learn to idle again.

[axe s]

I use it, awsome stuff, however if the engine is old, the carbon on the ring lands can help the rings seal, this stuff will wash it away. Pretty lethal stuff though, especially what comes out the exhaust after

Agreed.. it is a very good cleaner.. but only recommended for horizontal motors as it is designed to remove the excess build up from the design of the motor it can be bad for a vertical motor..

older motors can rely on that build up to take up the gap in the rings etc...

i would not recommend unless it is a tight motor..

That said i have had a subaru tech telling me that they use it on every car they work on...

[EJD001]

we sell this stufff at work.. havent tryed it on my car yet.. might be an idea too