Using Subaru Upper Engine Cleaner

**insanekiwi** · 05-06-2011, 08:23 PM

Hey guys,

Trying to give Subaru Upper Engine cleaner a go... I got 2 cans, one for my partner's 2.0 FSI, and my 1.8T.

Which vacuum hose / pipe do you recommend to get this in? I know that it has go post MAF to not to damage it. I have FORGE Tip... should I get one of the tubes there? any recommendations?

Thanks.

**noone** · 05-06-2011, 08:27 PM

Throttle body I believe.

**Transporter** · 05-06-2011, 09:35 PM

Have a look in this thread in MK5 section. http://www.vwwatercooled.org.au/f15/...ice-58037.html

**D4li_L4m4** · 09-08-2018, 04:15 PM

Mega Bump

Hey guys, in case anyone else out there had similar problems or just a idle that's a little rough the subaru upper engine cleaner sorted it for me.

I just removed the pipe from the intake and sprayed it straight in, left it for 5 minutes then sprayed the rest in as the car was sitting at 2500 rpm. Went for a drive, let it cool.

Was slightly rough - say 1 start out of 2 - especially on cold start. Now its perfect.

My car is a 2.0 FSI Jetta, MK5 with the DSG 6 speed. has quite a few Kilometers so it made a difference, but on the other hand mine has always been serviced by VW so it was looked after. plus it just had the major service 30000ks ago. If you haven't gotten it it serviced correctly you might still need to get the manifold taken off etc.

No issues after driving, oil was fine. Used 70% of a can.

**sambb** · 09-08-2018, 04:38 PM

ive done it a few times . I'm always a little shy to use too much of the foam. Is it 100% O2 sensor safe? I've always just pulled off the little vacuum line that goes to the DV and sprayed it in there with the nozzle to fill the plenum. The throttle body I do by hand after dropping off the TIP. If you want to get a look at your pistons just check them when you do the plugs - you can get a good look at the piston crowns through the plug holes and if its covered in chunky black stuff then do it, if not then it might be a waste. Best thing I ever did for cleaning the combustion chamber was water injection. Didn't take long to change the piston crowns from brown/black textured deposits to being clean as a whistle.