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1992 Honda Civic Blowing smoke after rebuilding twice

Tiny
DENIS GREGOIRE
  • MEMBER
  • 1992 HONDA CIVIC
Engine Mechanical problem
1992 Honda Civic 4 cyl Front Wheel Drive Manual 216k miles

Bought the car used and it was blowing lot's of blue smoke and drank oil a litre a day. I rebuilt the engine myself, put new rings on and honed the cylinders, I had the head done at a machine shop. Put it all back together ran fine no smoke passed emission test very well. After about 8k it started blowing blue smoke again real heavy. I assumed the reason that this happened was because I used synthetic oil and overfilled the crankcase, or perhaps the PCV valve faulted. I did a compression check and it was all over the place.
So I bought new rings again, honed the cylinders, cleaned the heads really well and checked them, changed the valve seals again, put it back together. Used regular oil and did not overfill Ran fine no smoke till around another 5 to 8k and again huge amount of blue smoke

What possibly am I doing wrong?
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Thursday, May 29th, 2008 AT 6:33 PM

4 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

Did you check the piston ring end gaps, your bore may be over size and the rings are loosing tension causing the oil consumption. But with out seeing it first hand it is a bit hard to come to a positive conclusion.

Mark (mhpautos)
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Friday, May 30th, 2008 AT 5:05 AM
Tiny
DENIS GREGOIRE
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I know what you mean, however the bore is stock so is the pistons, Honing only removes the glazing and putting stock rings back in shouldn't be an issue. If the rings gap was to large would it blow smoke right off the back and not after 8 thousand K's?
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Friday, May 30th, 2008 AT 9:37 AM
Tiny
KHLOW2008
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Hi Denis Gregoire,

What about the quality of the parts you use?

When I do any overhaul, I refrain from honing the cylinders.
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Friday, May 30th, 2008 AT 12:50 PM
Tiny
MHPAUTOS
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Hi there,
You say the bore is Std size, did you check the piston to bore clearance at top, middle & bottom of cyl.

Mark (mhpautos)
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Friday, May 30th, 2008 AT 8:27 PM

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