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Rb25 On Boost At Idle?

hardsteppa

By hardsteppa,
in Engines & Forced Induction

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hardsteppa Grand Master

hardsteppa

Posted
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so, is anyone that's posted actually an engine rebuilder or qualified mechanic? Reason being, it was actually a mechanic from a well known and respected tuning workshop that recommended this as a way of removing carbon deposits from an engine we were having trouble with (and no, he did not have a spare engine there he was trying to sell). It is putting water through an engine so I'm not surprised about some of the comments lol, but I have seen it work firsthand and done it several times in different engines, and never had any engine trouble afterwards, no water in oil, nothing. Small amounts being the key, not a gardenhose or firehose, although I admire the enthusiasm there :P

89CAL Grand Master

89CAL

Posted
Posted

This is why my car never sees a work shop....

+1

Water does not compress well, not a good thing when your squeezing a volume to 1/9th (roughly) its original size.

It just sounds dodgy. The reason water methanol works is because its under pressure and atomised (Like your fuel is when it goes through your injectors). I dont really care what workshop it was, and I dont care how many more engines they've built then me, as far as I'm concerned you dont let any contamination into your engine, wether it be dust, water etc. The photo posted above of the conrod bent, is exactally what could happen if to much water (in liquid form) gets into your cylinder

In sumary:

Water Meth = Yes

Water sucked into your engine through a vac line = No No

luke gtr Grand Master

luke gtr

Posted
Posted

I've seen similar done with Ford workshops and their intake/carbon/injector cleaner.

They used to have a tin of spirits(forget what it was exactly, more or less carby cleaner).

Pull off a vacuum line, pull up the recap, and stick it in the liquid.

Never heard of anyone bending a rod from doing it.

Maybe if you used the booster vac line?

And I'm not sold on the water idea.

Maybe some throttle body cleaner???

Bsa Mentor

Bsa

Posted
Posted

i was told by a subaru mechanic to put a full can of tb spray through my wrx only beacause the pistons near always sit in oil. on a rb a few small sprays and watch the shit come out the back and your done cant see water cleaning the engine its not made of carpet

Pal Veteran

Pal

Posted
Posted

I remember back when i had a torana, i used to rev the engine up a little and drop small amounts off water down the carbie and watch all the crap come out of the exhaust.

Done this every tune up i done and no problems. Realistically, very small amounts would form small droplets and go through the engine ok.

I think the method behind it is cold water hitting hot carbon would 'blast' the carbon off surfaces and spit it out the exhaust.

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