i recently rebuilt a JDM B16 and put new pistons and rings in it. i have a problem though when i sit at and idle for a while or when i first start my car i blow dark blue smoke. I've smelt it and it doesnt smell like oil... but i dont think its emissions. could it be possible i put a ring in upside down? im lost right now and want to know if anyone has the same thing. there is NO smoke at high rpm just at idle...weird i know. thanks

 

bump anyone?

 

Naw, if it was a ring it'd be smoking at high RPM too.

What kind of setup is it, stock?

 

it is a JDM B16 block bored .001 over with 11.1 compression pistons stock rings and has a b16a2 head w/ ctr cams.

 

bump

 

I don't think you can put in rings upside down.. Don't quote me on this, as i assembled a big block for a hotrod and didn't think they had a direction.

Granted this wasn't a honda.

Btw do a compression test and compare it to what a 11.1:1 should be in psi.
?? worth a shot..


Modified by likwidchz at 9:17 AM 8/17/2007

 

yea man ive rebuilt many small blocks with my dad and never had this problem.... i will need to get a comp test then maybe. not sure. it runs waaay fast and strong i think id feel a compression loss...

 

depends on the maker of the ring, usally there is a dash or slot missing from the half that is meant for the top, your problem could stem from inprpoer hone, to wrong rings ie wrong size (too small or big) wrong installation, or just plain bad quality.


it could not be realted to the rings at all valve stem seals, or oil pump could cause this burn, i suggest a compresion and leak down test to find the source of the problem

 

and congrats on that 1970 chevelle fender extensions FTW

 

i had the block bored out and the head completely rebuilt so it was like brand new stuff... i think the ring is backwards.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by likwidchz &raquo;</TD></TR><TR><TD CLASS="quote">I don't think you can put in rings upside down.. Don't quote me on this, as i assembled a big block for a hotrod and didn't think they had a direction.

Granted this wasn't a honda.

Btw do a compression test and compare it to what a 11.1:1 should be in psi.
?? worth a shot..</TD></TR></TABLE>

You can't put them on "upside down" per-se, but you can put the order backwards.

I forgot about Hondas, but for most engines it's:
#1 and #2 are compression rings
bottom = oil scraper ring.

I agree 100% on the compression check though, but I doubt this is blow-by, if it was blow-by you'd be losing oil every time you downshifted or redline, it doesn't seem like that if it's ONLY coming out when you start the car. That's very weird. The oil must be collecting someplace and collectively blowing out when you start the car.

This happens in turbo diesels, the turbo collects oil when you leave the car/truck sitting there and idle then when you pound the gas through the floor it shoots smoke out the back - from all the oil collecting in the turbo.

Though obviously this engine isn't boosted. Though I still will retain the theory that if it's happening only (AND ONLY) when you start the car, that the oil is collecting someplace while the car is off, and blowing off upon startup. Where? No idea....

Sorry I can't hep you further, check your oil pressure and compression. From there I'd look for any oil leaks.

 

hey i just remembered i do have a TB spacer and it does act as bolt on "turbo" so to say as it spins the air cioming in...would that affect anything?

 

also another important fact to rember is did you set piston ring gaps in the correct area? you cant have them in the wrist pin area

also did you hone or take too much out without getting the .01 oversized ring ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93egB16A &raquo;</TD></TR><TR><TD CLASS="quote">hey i just remembered i do have a TB spacer and it does act as bolt on "turbo" so to say as it spins the air cioming in...would that affect anything?</TD></TR></TABLE>

no it doesnt do as much as they say,

 

the gap came preset. i also talked to the guys at the honda dealership in the building department about how much i could bore and still use stock rings and i did just what they said. the machine shop bought vthe rings to fit anyways. it isnt alot of smoke so i think its 1 cylinder.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93egB16A &raquo;</TD></TR><TR><TD CLASS="quote">hey i just remembered i do have a TB spacer and it does act as bolt on "turbo" so to say as it spins the air cioming in...would that affect anything?</TD></TR></TABLE>

Wait, I'm lost.

How does a throttle body spacer act as a turbo?

I missed something.

 

it doesnt act as a turbo wat im saying is it "streamlines" the ait incoming so would that change anything? turbo wasnt meant to be said...they do work though i will say that for the TB spacer.

 

ok how about position i have a picture somewhere of the ring gap placment but i cant find it, i know for a fact that you cannot have them in the wrist pin areas non of the 5 rings can have over lapping gaps or be placed in either wrist pin area

 

i am not sure their position because my dad was the one who put them on for m while i was at work...i know letting a musclecar guy work on an import but hes the best mechanic i know. so id have to ask him.

 

well pick up the service manual for your B16 and refer to the engine assembly part and see if you can use any of that info for your gain.

Good luck.