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 Post subject: DIY - How to use Upper Engine Cleaner (UEC)
PostPosted: Sun Mar 15, 2009 2:11 pm 
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I Say: Nowhere near as much as I used to!
Vehicle: MY08 XT 4EAT tickled by TH

Posts: 16213
Location: Sydney, AUS
Upper Engine Cleaner

Subaru have a service product called Upper Engine Cleaner (UEC) which removes deposits from within the induction system and combustion chamber. The part number is SA459 and it costs around $16-17 per can.

Subaru claims that UEC removes gum, varnish and carbon deposits from the combustion and intake systems, helps smooth rough idle, helps reduce pollution, improves fuel consumption and improves performance.

Not a bad list of claimed benefits eh?

Subaru recommend that UEC be used at every scheduled service (being every 12,500km). If you service your car yourself, or get a mechanic to do a very basic oil change service only, make sure that you buy this stuff yourself and use it (or insist that your mechanic uses it!)

Now… I bet you’re thinking that UEC is no different to ‘carby/throttle body cleaner’ and other similar products. Well, it is actually a unique product in that it actually foams up to help it adhere to the various surfaces inside the engine. This gives a better overall clean. Normal carby/throttle body cleaner is just a liquid, so don’t try to empty half a can of that stuff into a stationary engine (hydrolocking an engine isn't pretty!)

Also, it is recommended that you use this product BEFORE doing an oil change. There is a chance that some of the UEC may find its way past the rings and into the crankcase, and may potentially contaminate and dilute the engine oil. Therefore, it is best to do it immediately before you do an oil change.


So… how do you use UEC?

Warm the engine to operating temperature (go for a short drive) and shut the engine off.

The next step is to spray half of the contents of the can into the inlet manifold. The can comes with a short plastic pipe that attaches to the nozzle of the can. The way in which you do this will vary depending upon the year of your Foz. The early model GT’s have a spare nipple (yes, I said nipple) on the top of the inlet manifold. It is the same nipple that is suitable for use when installing a boost gauge! The location of the nipple is circled in green.

Image


The late model GT’s (and the XT’s also) have a downwards-facing nipple that you can use for this purpose.

Image


It is near impossible to actually spray the UEC into this nipple due to the way it faces, plus the can won’t expel its contents when turned upside down! The easiest thing to do is loosen the stock vacuum line off the nipple, get a short section of spare vacuum hose and attach it to the nipple, and spray the contents of the can in via your newly created ‘extension hose’. It makes the job a lot easier!

Image


For the NA models, look for a vacuum hose connection as close to the top centre of the inlet manifold as possible, and ensure that the hose connects directly into the inlet manifold (ie. is not a sensor connection or similar). Thanks to Nick Fry for this pic! ;)

Image


Before doing all this, try to get a good feel for the weight of the can beforehand, so that you can guesstimate when you’ve sprayed about half the can in.

You then let the car sit for 5 minutes so that the UEC can do its job.

Next, start the car. It may take a few kicks to start due to the UEC being side the engine. You may also need to lightly apply the throttle/accelerator to aid starting. Now, with the car running, you need to start spraying the rest of the can into the manifold. The engine revs will drop when you do this, so be prepared to manually adjust the throttle with your hand from within the engine bay to keep the revs up and stop the engine stalling. On the XTs they have 'drive by wire' throttle bodies so you can't manually adjust the revs from under the bonnet. You will need a helper to provide some throttle action from the driver's seat. Thanks to Bye Evo for the tip! ;)

Once the can is empty, stop the engine and let it sit for 5-10 mins. Replace the vacuum line or cap on the nipple on the intake manifold. Start the engine and take the car for a drive to purge the remaining foam.

When the engine is running after you’ve applied the UEC you may notice some white smoke coming from the exhaust. This is perfectly normal. The amount of smoke, and its colour, may depend upon how long ago the UEC was last used on your car (the longer it was, the more junk will be expelled!)

The UEC is well worth using as it makes the engine noticeably smoother and perkier, particularly if you haven't used the UEC for a while. I rate it as an excellent product that can be used just as effectively on non-Subaru vehicles.


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 Post subject: Re: DIY - How to use Upper Engine Cleaner (UEC)
PostPosted: Sun Mar 15, 2009 2:37 pm 
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I Say: I'd have to save up to be broke
Vehicle: 05XTL Rattlebox

Posts: 5070
Location: SE Brisbane, QLD
Will try and get a pic for the NA boys Pete :D


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 Post subject: Re: DIY - How to use Upper Engine Cleaner (UEC)
PostPosted: Sun Mar 15, 2009 4:44 pm 
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I Say: Looks like I picked the wrong week to quit drinking.
Vehicle: 03XS Auto-Red;Mercedes Valente

Posts: 21744
Location: Central Coast, NSW
Timely DIY, Pete.

I have this on my list of things to do this week. :D

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 Post subject: Re: DIY - How to use Upper Engine Cleaner (UEC)
PostPosted: Sun Mar 15, 2009 5:43 pm 
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I Say: I'd have to save up to be broke
Vehicle: 05XTL Rattlebox

Posts: 5070
Location: SE Brisbane, QLD
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Circled in red?

Edit: Will get a higher res picture later.


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 Post subject: Re: DIY - How to use Upper Engine Cleaner (UEC)
PostPosted: Sun Mar 15, 2009 5:47 pm 
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Vehicle: 03 -15 XS White/Metallic Grey

Posts: 734
Location: Sunshine Coast
Does the can have a mark on the side to show when it's half full or half empty?

:twisted: :twisted: :twisted: :twisted:

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 Post subject: Re: DIY - How to use Upper Engine Cleaner (UEC)
PostPosted: Sun Mar 15, 2009 5:50 pm 
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I Say: Nowhere near as much as I used to!
Vehicle: MY08 XT 4EAT tickled by TH

Posts: 16213
Location: Sydney, AUS
Nick wrote:
Image

Circled in red?

Edit: Will get a higher res picture later.


Awesome... added to first post!



subyroo wrote:
Does the can have a mark on the side to show when it's half full or half empty?

:twisted: :twisted: :twisted: :twisted:


Hehe... methinks not ;)


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 Post subject: Re: DIY - How to use Upper Engine Cleaner (UEC)
PostPosted: Sun Mar 15, 2009 5:59 pm 
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I Say: what you talkin about willis?
Vehicle: SF5-MY98-BLK-LEATHER-EQUIPPED

Posts: 2560
Location: WEST_SIDE_MEL_BURN
now looked everywhere except STI docklands...
where could i get one of these...
really need it now as my car i getting service tomorz
but yeah would be handy to know where to get one and
nice write up by the way...

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 Post subject: Re: DIY - How to use Upper Engine Cleaner (UEC)
PostPosted: Sun Mar 15, 2009 6:07 pm 
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I Say: Nowhere near as much as I used to!
Vehicle: MY08 XT 4EAT tickled by TH

Posts: 16213
Location: Sydney, AUS
jkoolz wrote:
now looked everywhere except STI docklands...
where could i get one of these...
really need it now as my car i getting service tomorz
but yeah would be handy to know where to get one and
nice write up by the way...


Any Subaru service/spare parts centre will have them. It's a Subaru-specific part so nobody else tends to stock it. Ford do have a similar product made by the same manufacturer (BarsLeaks) but I'm not sure exactly what it's called.


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 Post subject: Re: DIY - How to use Upper Engine Cleaner (UEC)
PostPosted: Sun Mar 15, 2009 6:09 pm 
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I Say: what you talkin about willis?
Vehicle: SF5-MY98-BLK-LEATHER-EQUIPPED

Posts: 2560
Location: WEST_SIDE_MEL_BURN
that explains everything the dudes ant autobarn and supercheap
havent even heard of them dummassees...
shankaholics

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 Post subject: Re: DIY - How to use Upper Engine Cleaner (UEC)
PostPosted: Sun Mar 15, 2009 9:23 pm 
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Vehicle: my05 xt

Posts: 118
Location: Melbourne
nice DIY. Will do this next weekend


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