1991 Honda Civic Oil In My Air Intake

PELUKENA

MEMBER
1991 HONDA CIVIC
4 CYL
2WD
MANUAL
176,000 MILES

Four mechanics later we still can't figure out why my civic won't stop smoking. When the car runs it sounds fine but it smokes like hell. The last mechanic said it's odd that there would be oil in the intake at the highest point? Do you think I have a lower engine problem that I should just replace the entire long block with another one that should hopefully clear up the entire engine problem?

4 Replies

DAVE H

MECHANIC
13,384 POSTS

Sounds like piston ring has gone. Or a scored piston chamber and it's letting oil into firing chamber. Untill it's stripped down you will never know the exact problem. Could also be a crack in the head letting oil through or head gasket? Engine needs to be compression tested at the very least?

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Saturday, November 22nd, 2008 AT 6:14 PM

PELUKENA

MEMBER
2 POSTS

Aloha & mahalo nui loa for your kokua "help", Tara the last mechanic did a compression test & he said everything seemed to be compressing well? I currently have a 1.6 long block on hold at Rising Sun Motors that comes complete with water pump, timing belt and tested before shipping. Do you think this will help alleviate most of my oil leaks & smokin problems?

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Sunday, November 23rd, 2008 AT 3:05 PM

DAVE H

MECHANIC
13,384 POSTS

Remove each spark plug. Check to see if any have oil on them?

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Sunday, November 23rd, 2008 AT 4:24 PM

DAVE H

MECHANIC
13,384 POSTS

Have your mechanic check the PCV valve?

POSITIVE CRANKCASE VENTILATION (PCV)

The PCV system uses intake manifold vacuum to extract blow-by vapors from crankcase. The mixture is then passed into the combustion chamber and burned. PCV valve provides control by metering flow of blow-by vapors according to manifold vacuum. PCV valve is located in valve cover.
Under conditions where abnormal amounts of blow-by gases are produced (such as worn cylinders or rings), the system is designed to allow excess gases to flow back through crankcase vent hose and into air inlet for consumption during normal combustion.

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Sunday, November 23rd, 2008 AT 4:33 PM