Question about 2002 Mitsubishi Lancer

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1988 Lancer, 5 speed, 4G15 engine. Blow by hose fills the aircleaner with oil.\r\nHave replaced PVC valve, measured & honed bore, replaced rings, vacumed checked valves, replaced valve stem seals. Please help!!!

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  • Anonymous Mar 22, 2014

    Getting oil vapors from oil fill cap

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This problem is usually the result of worn rings but since you already did that, then check the passage that the PCV valve is connected to. It might be clogged, causing a restriction. If that isn't it, then drill a hole at least a quarter inch in size in the top of an old valve cover filler cap and install it. Drive the vehicle and see if things improve. If they do, then check to make sure that you have the correct PCV valve installed.

Posted on May 22, 2011

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One of your rings did not seat

Posted on Oct 20, 2011

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Posted on Jan 02, 2017

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1 Answer

Do you have to replace the pistons and piston rings when doing an engine overhaul on an isuzu kb 2.8 1996. the pistons still looks good


we are USA
no KB here, not a one., sorry why ask Yankee's this./..??
your machine shop would not ask that question.
a real overhaul (if measurements prove the case, all parts are MIKED)
1: measure bores. top/bottom and 90 degrees.
2: then bore and hone it to next oversize.
3: then new pistons and rings. and all new bearings

any thing, less is a DIY, trash build.
shade tree , hack.
(the Bernard Lawrence Madoff" ) way. (dig?)
there is one more way, if measurements warrant. IT.
light hone,.
new rings, std, size or what's there, now.
then keep old pistons if lands measure ok. (inspections here are many )

I guess you don't have the micrometer sets to do this right?
inside bore gauge. etc.?
what we do is take the block to a real machine shop
the mic it for a fee. (some do it for free)
then they tell you what is best, and is always the best answer.
why not let a pro rebuild your engine.
for max future life, not lowest cost and shortest life.

ask how to clean a block after honing
its not easy and must NOT BE SKIPPED.

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4th per inch diameter of bore is the norm for a water cooled engine .so your bore is roughly 3 inches from memory so a ring gap of 12 to 15 th ,check the thickness of the ring in the piston groove as well as up and down movement can and will cause excess oil consumption .give the bore a hone as well with a special honing tool ,not that expensive from a motor factor .

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check sump oil level--excessive oil level will cause this
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