Go Back  HondaCivicForum.com > Civic Style > Engine & Internal
Reload this Page >

Only smokes after decelleration AND when it's hot outside.

Engine & Internal Chat about beefing up your engine's insides here.

Only smokes after decelleration AND when it's hot outside.

  #1  
Old 03-24-2009, 02:01 PM
Junior Member
Thread Starter
Join Date: Mar 2009
Posts: 10
Default Only smokes after decelleration AND when it's hot outside.

Only smokes after decelleration AND when it's hot outside.

This one has me scratching my head.

95 DX had nearly 300k on the odo, so I took the engine out, had it rebuilt by Perfect Engine here in LA, put it back in, broke it in, everything was cool. Two years ago, now.

Last summer it was hot as blazes here. Always is. (110+ in the Valley.) The engine started to really smoke under very specific circumstances:

If I run at a higher rpm, like around 4000 for a while then punch it, say, as if you're in 3rd on an onramp, you merge and steady your speed, then drop the accl, whoom, clouds of smoke.

But ONLY when it's hot. Only.

Right now it's like 60-70ish, nothing. Nada. No smoke. No consumption.

Even when it's hot, I can drive at a steady rpm whether it's slow or highway speeds, all rpm ranges, as long as it's steady- no smoke. AND even under heavy accelleration from a dead stop, no smoke.

But the second i back off the throttle, say if traffic slows down, then speeds back up and I accelerate, even if it's not a hard acceleration- smoke.

Head? Top-cylinder? I have another head ready to go on, but I'd like to hear some second opinions before I get all into it.
 
  #2  
Old 03-24-2009, 02:04 PM
RonJ's Avatar
Recognized HCF Member
Join Date: Sep 2007
Location: Houston, Texas
Posts: 9,453
Default

What color is the smoke?

Are you losing coolant or oil or running rich?
 
  #3  
Old 03-24-2009, 02:22 PM
Junior Member
Thread Starter
Join Date: Mar 2009
Posts: 10
Default

Oh right, definitely oil. No doubt about it.

I suspect the rings.

I really want it to be something else, but I'm definitely thinking rings.
 
  #4  
Old 03-25-2009, 10:16 AM
Junior Member
Thread Starter
Join Date: Mar 2009
Posts: 10
Default

Surely one of you guys has experience with engines, right?
 
  #5  
Old 03-25-2009, 10:26 AM
RonJ's Avatar
Recognized HCF Member
Join Date: Sep 2007
Location: Houston, Texas
Posts: 9,453
Default

What makes you confident that the smoke represents burning oil?

If the engine is indeed burning oil, then the source could be (1) bad piston rings, (2) a bad head gasket, or (3) bad valve seals.

The first two possibilities should be distinguished from the last possibility by doing a compression test of the cylinders and a leak down test. See Cylinder Compression link in my signature.
 
  #6  
Old 03-26-2009, 06:28 AM
Junior Member
Thread Starter
Join Date: Mar 2009
Posts: 10
Default

Basically experience, I guess. The smoke smells like oil, it's definitely bluish/gray, and I'm having to top off oil pretty frequently. It's definitely not coolant; that smell is very distinctive and thankfully not present, the coolant level is consistent and clean (also, oil shows no sign of contamination), and the cooling system maintains normal pressure. Fuel/air mixture is fine. ( no acrid odor, emissions are within normal levels, and the smoke is not at all black.)

I'll do the comp/leak-down today.
 
  #7  
Old 03-26-2009, 07:37 PM
HCF Member
Join Date: Jan 2009
Location: AZ
Posts: 226
Default

Ok yeah if its a blueish color then its oil. If the smoking only happens in hotter conditions then run a heavier oil in the summer. I would guess your rings are worn or stuck a bit. The rebuild on the motor may have poor, Hondas are built with tight specs on the piston to wall clearance. The smoke only coming upon deacceleration is the rings if it smokes while accelerating then its the valves.
 
  #8  
Old 04-17-2009, 08:09 PM
gkitf16's Avatar
HCF Member
Join Date: Apr 2005
Location: Tampa FL
Posts: 29
Default

From what I've read, when they're putting rings on during a rebuild, the gaps must be staggered away from each other, and no gap can be in line with the piston pin or at right angles to the pin. Provides the greatest sealing between the rings. You are making it harder for gasses to leak by the rings, creating a longer "leak pathway".
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Drax35
Mechanical Problems & Technical Chat
0
02-13-2013 04:19 PM
seanperia
Mechanical Problems & Technical Chat
53
02-03-2011 05:09 AM
Drax35
Mechanical Problems & Technical Chat
2
01-11-2010 07:09 AM
scooter
Mechanical Problems & Technical Chat
3
04-19-2006 08:26 AM
Robsonline
Mechanical Problems & Technical Chat
3
04-27-2004 11:08 PM


Thread Tools
Search this Thread
Quick Reply: Only smokes after decelleration AND when it's hot outside.


Advertising
Featured Sponsors

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.