Greeting all, I posted this question awhile back, but I am still troubled with it. My 1990 Accord smokes after sitting overnight and when cold. Sometimes it is just a puff or two, sometimes it is like a fog machine until the engine is hot, but not all the time. Obvious answer is valve guides, but I'm not so sure, something else may be going on here. Anybody have any ideas? Car has about 125k on it, not reallyhigh for a Honda. Thanks for you help.

 

My experience w/ leaking valve stem seals yielded smoking after a prolonged idle w/ fully warm engine. Smoke would be small puffs of grey-blue smoke. Upon accelerating after a prolonged idle, there would be a brief larger cloud of similar smoke. However this was Mitsubish V6, not an Accord so yours could be different and still be stem seals.

Have you checked the PCV system to be sure it's not pulling oil through PCV valve, or pushing oil into intake through a blocked PCV?

These seals can be replaced w/o pulling the head, but I've never done this job. It does require injecting air into cylinder to hold the valve in place while stem seal is replaced. It appears to be a tricky DIY job.

good luck

 

Greetings all,
Think I found an answer to my problem, and thought I would pass it on to the other members. By sheer accident I talked to a Honda Specialist this last week and asked about this problem. Answer, its a stuck ring, very common in Honda. Evidently Honda uses a light ring, low tensile strength and its quite common to find one stuck,especially in high milage cars that have not had the oil changed as regular as it should be. Apparently itcan be fixed with frequent oil changes, chemicals, and such. Hope this helps someone else.