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Old 01-08-2012, 07:48 PM   #14 (permalink)
Wanting more for less
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Join Date: Jan 2011
Location: New South Wales, Australia
Posts: 307

Metric - '94 Honda Magna 250
90 day: 70.63 mpg (US)

RedCelica - '94 Toyota Celica ZR
90 day: 35.97 mpg (US)

i30 - '12 Hyundai i30 Elite
90 day: 39.84 mpg (US)
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Originally Posted by mwebb View Post

PCV "catch can"
no engine should ever need a PCV Catch can , if yours does , that is one indication that your engine has bad piston rings or a sloppy seal at the turbo center bearing
the piston rings may just be frozen with carbon in the lands because the engine has been operated with
poor quality oil for many moons
When I was driving "BoB" as my daily, I fitted a catch can (home made) because of the amount of oil coming through the PCV.
I later fitted a basic water injection system (also home made) to clean carbon from the combustion chamber and rings.
It restored some of the power and fuel economy the engine had lost over the years (over a few weeks), it also stopped the engine dumping so much oil out the PCV.
I'd been draining 15 to 20 CCs from the catch can every couple of weeks. After the rings had freed up (I guess), I only got a few drops out of the catch can.
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