Driving my car to work this morning and noticed a big puff of white smoke after I floored the car to get around someone. Tried it a few times later and there was less smoke bu still there. The last time I tried it there was none. I have a 30 minute drive to work and temps were around 50. I know they are suupose to use oil but I've haven't noticed this before. Got just over 90k on it. Any thoughts?

 

does it happen when u turn it on in the mornings.

 

white smoke = coolant/water

 

Hmmm....I "was" having the same problem. My 12A has about 30k miles on it after a rebuild 3 -4 years back. My situation was weird. I used to regularly over rev the crap out of my car, to like 8.5k rpm's, just being dumb with the car on the streets. I did an oil change one day then, a couple days later, whenever the car would be cold it would billow out massive amounts of smoke till it was warm. I figured fine I wore out the oil seals or a water seal from over revving. I still don't know what happened but it stopped smoking, like all togetrher it just doesn't smoke anymore. It's been like 6 weeks since it smoked. Anyone have some info on these "phenomenons".

 

Worst case senario is you have a water seal going bad. Easiest fix, and I know some of you are against this but it does work well, you can use a sealing quick fix. I'm talking about those radiator sealers, usually come in a bottle and looks like its full of aluminum shavings because it is. Me and some friends use them whenever there is a problem on our motors and we don't have the time or money to rebuild. It takes about an hour and a half of your time to complete, but it's worth it IMO.
They work well, and I haven't seen them fail yet. I bought one RX7 from an older woman after it overheated on her at 90k miles, it was an 84 12A. It smoked so heavily it was funny, I had never seen a motor so bad. Clouds poured out of this exhaust. Anyway I used the sealer and its been about 10 months now with no sign of failing, the repair has about 7k miles on it and its going strong. Anyhow it's just something to consider. Good Luck

 

if it happened after flooring it at a decently high rpm when you let off, its most likely the corner seals, they let oil get by and it makes a large puff of smoke, but it could be a water seal as the others have said as well.

 

There is a quick puff of smoke in the morning. Kinda like a GM 350motor that has bad valve seals.

 

ive never had a rotary that didnt make that smoke in the morning, even low mileage ones.

 

smoking in the morning is completely natural, the oil in the engine or at the injectors has nowhere to go but down into the combustion chamber where it "puddles" up i guess

well thats the smoke in the morning,

And i would never use that block sealer, thats just ruining an engine man, why don't you just pour it down into the intake, because thats all its doing is going right into the engine block if you're burning coolant, i guess its a good quick cheap fix, but its just not right if you ask me

p.s. my dad said when he bought his 80 rx7 right off the showfloor in 1979, it smoked in the morning and it was brand new, so i guess they are just supposed to do that

 

Well I fyou use the block weld tric you end up with a block that you most likely can't rebuild and then you have to buy a whole new engine to work with.

 

I understand the relavance of the fact that the oil settles to the bottom of the combustion area while let to sit for a long while. But regardless I have never had a 1st gen or a 2nd gen that smoked in the morning or after sitting for a long while. The post I left earlier explains of the first time I have ever had this problem myself. I have had low mileage original motors as well as high mileage originals and rebuilds over the years. I geuss I should be glad and consider myself lucky that I never had a car that smoked before. Especially considering how hard I drive. Not one day goes by where my 1st gen with a stock 12A doesn't see 8k rpm.

 

Its sounds like the Apex seals are locking up. Try the "ATF trick" on your rotors. I used BG 44k instead of ATF though. It doesnt smoke half as much and 44K eats the hell out of carbon, sludge or anything when in direct contact. It won't foul the crap out of your spark plugs either. I followed the procedures from www.mazspeed.com/atf.htm
and sub'd ATF with 44K.

 

Found the problem.

Seams the heater hose on he drivers side had a hole in it. Not sure why it came out the back of the car in such a fine mist that it looked like smoke, but fixed and all is fine now. Thank you all.

 

well there you have it.

 

Dont' know what that stuff is, but are you sure its safe on rubber? (oil seals, etc)

 

Check it out at bgprod.com then click on BG Consumer. It is some awsome ****. The mechanic I used to work for once poured a small amount of 44K on a badly carbonated engine head, when we returned the carbon looked like dried mud and just flaked off of the aluminum. I used it instead of atf for that "atf trick". It made a little smoke but probably not half as much as atf would. After about 20 miles of freeway driving, I got back to the house and that baby was just purring perfectly. Not to mention a noticed increase in power. It is a fuel additive so I see no reason why it could be harmful to rubber or any seals for that matter.