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Lets Talk Upper Engine Cleaner

Hadouken

By Hadouken,
in General Maintenance

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Hadouken Grand Master

Hadouken

Posted
Posted

Hey hey hey

Ive always wanted to try the Subaru upper engine cleaner. Heard of them being used on subies, evo's, vw's. So why not get rid of some carbon build up in the gtr?!

Bad idea? Please tell me why?

Yes I have searched, yes they are all in 2006 and one I found was in 2003 lol.

Question time. Where do I spray it? Do I take my intercooler pipe off the plenum and spray the first 1/2 of the can in there? Then after that where do I spray while its running?

Thanking you.

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Hadouken Grand Master

Hadouken

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So far,

  • Do it before a oil change
  • Spray 1/2 the can in each individual cylinder (thanks silvia guys)
  • Do the other half while the engine is running through a vac line
  • Make sure it is well ventilated (some videos are crazy haha)
  • Get it from Subaru dealer
  • The more smoke the dirtier your engine was
  • Its the ducks nuts

jjman Mentor

jjman

Posted
Posted

id be interested to know if anybody has had any bad experiences with it...

anybody?

i used a can on my old sonata and it seemed to make it smoke even more and use more oil.... (tho its got over 250k kms on it n they are shit engine...)

Still got a can sitting in there so wondering if i should run it thru the RB25...

turbo seals? O2 sensors? high flow cat?

simpletool Mentor

simpletool

Posted
Posted

Nulon upper engine cleaner is cheaper.

Warm up the engine first. Turn it off and spray it in all hoses leading to the manifold and AAC. Let it sit. Crank engine and it will start in 5 seconds or so. Repeat.

You'll probably need to reset your idle. I even had to change my cold start values.

Hadouken Grand Master

Hadouken

Posted
  • Author
Posted

Nulon upper engine cleaner is cheaper.

Warm up the engine first. Turn it off and spray it in all hoses leading to the manifold and AAC. Let it sit. Crank engine and it will start in 5 seconds or so. Repeat.

You'll probably need to reset your idle. I even had to change my cold start values.

The subie stuff is only $18 per can. Did it f**k your cold start valve? havent heard of the subie stuff needing to reset idle nor taking out the cold start valve. Maybe this is a skyline thing

Hadouken Grand Master

Hadouken

Posted
  • Author
Posted

been thinking about this stuff as well, think I'll see what my mechanic thinks next time I'm in there.

Some Mainlube engine flush probably wouldn't go astray either for the oil system!

I like your thinking. Let us know what your mechanic says

mad082 Grand Master

mad082

Posted
Posted

i used some in my vt commodore (had about 210,000kms on the clock at the time, and has nearly 245k on it now). other than making it smoke like a sumbitch when i started the car again (until it burnt it all away), it didn't actually do much. i pulled the intake plenum off afterwards and it was still sort of caked on so i scrubbed it clean with some carby cleaner and degreaser. didn't make any difference to how the car drove though.

_x_FiReStOrM_x_ Community Regular

_x_FiReStOrM_x_

Posted
Posted

I've used this sort of thing many times in a few different forms (ie nulon, wurth, AC delco etc.) and so far have found the subaru one to be the most effective. The main thing to BE AWARE of is that i believe the fumes are carcinogenic, so ALWAYS be in a well ventilated (preferably outdoors) area, and use caution while spraying. Aside from that, follow directions on the Subaru can, and have an explanation ready for when the CFA arrive :).

  • 1 month later...
slidin32 Explorer

slidin32

Posted
Posted

Nulon upper engine cleaner is cheaper.

Warm up the engine first. Turn it off and spray it in all hoses leading to the manifold and AAC. Let it sit. Crank engine and it will start in 5 seconds or so. Repeat.

You'll probably need to reset your idle. I even had to change my cold start values.

its also rubbish compared to the subaru stuff, i use the subaru stuff in everything

jjman Mentor

jjman

Posted
Posted (edited)

i used some in my vt commodore (had about 210,000kms on the clock at the time, and has nearly 245k on it now). other than making it smoke like a sumbitch when i started the car again (until it burnt it all away), it didn't actually do much. i pulled the intake plenum off afterwards and it was still sort of caked on so i scrubbed it clean with some carby cleaner and degreaser. didn't make any difference to how the car drove though.

yeah iv never noticed a difference after using it.

Only difference i ever noticed was a bad one. Used it on a 2.0 4cyl Sonata with 250k on it. It blew a tiny bit of smoke beforehand and used a bit of oil. After some upper engine cleaner it blows smoke like a mother f**ker, especially from the valve seals (i pity the people that are behind me at the lights after sitting for a while) n it uses bulk oil now.

Never again.

The only time i can think it would be a useful product is as a repetitive preventative product in motors that are prone to build up. Otherwise its probably not going to move anything substantial (like injector treatment) and if it does itl probably create a problem in a car that is otherwise running ok...

Edited by jjman

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