Blue smoke on startup from brand new engine
 

We get lots of blue smoke on startup from my brand new engine. Once the car is warmed up or driven around there is no blue smoke. Can this be OMP related? I don't know how it works exactly so if there are any videos or other links you can recommend I'd like to look at it. Something may be connected wrong and engine getting too much oil at first. Any ideas on what may be the reason or what to check?

Are you talking about the very first start up? If so than it's normal to get a ton of smoke, as that's everything used during assembly burning off.

Additional lubrication during the break-in process isn't necessarily a bad thing. I'm just starting to break my new engine in as well and I'm running 2-3oz/gal of premix in the tank. Mine also smokes like a shisha bar when cold, but it goes away once temps rise.

It's better to be over-lubed than under-lubed, ESPECIALLY during break-in.

Sounds normal to me for the first start up.

To be clear, not the very first start up after the build, each cold start up we get lots of blue smoke.

Are you premixing or anything of the sort?

I've seen it on a lot of perfectly healthy broken-in engines with no cats. I wouldn't automatically be worried.

A video would be helpful :)

What are the details of the engine? Was was reused and what was replaced?

I think the engine is brand new.

brand new? or brand new rebuilt?

Not at the moment.

The engine hasn't been broken-in yet. Just starting it at the workshop to move the car in and out of the workshop. And short trips to other workshops in the industrial zone.

I will record one and post it. There is one in my build thread but when smoke was gone :)

https://www.rx7club.com/build-thread...-989042/page4/

Brand new engine from Ray @ Malloy Mazda.

Since blue smoke is not permanent, my mechanic is suspecting the OMP system but he doesn't know how the system actually works so wants some information on that to check if during re-install there was something wrong like with new lines or breathing nozzles or the actual unit etc. Obviously the engine is getting a lot of oil for some reason.

Ok, here is a video, it's not very clear because my friend took it with his iphone but you can see the smoke:

RX7 Idle 2 Video by ALPSTA | Photobucket

I thought you said it was smoking? :lol:

You're just being overcautious since you just spent a bunch of money. It's absolutely nothing to worry about. The engine is fine.

What turbo (s)? New or used? It could be a turbo pushing a little oil but even that looks minimal.

I wouldn't worry about anything until you put some actual drive miles on it and see if it clears up.

Your engine is more then fine and that video is hilarious, I pull great compression with my motor and when I start it up cold it's like a James Bond smoke screen. Most RX-7's burn oil on start up after they've had the thermal pellet mod done, which nearly everyone does after rebuilding a motor. As long as the oil smoke doesn't persist after it's completely warm then I wouldn;t worry about it.

Guys, I posted the wrong video, sorry :blush:

That video was after the car is warmed up. And the one below is the cold start. As you can see there's plenty of blue smoke. And the engine is brand new from Japan so I don't think it has the thermal pellet mod from factory.

RX7 Idle 3 Video by ALPSTA | Photobucket

The turbo is brand new GTX35R.

Looks pretty normal for cold start with emissions removed. Probably a little overly rich while cold, that can be adjusted with water temp corrections. Another thing to remember is that there is always a lot of condensation in a wide open exhaust system at start up.

It does not look like an oil injector issue. Did you install an oil restrictor on the turbo? If it is not restricted it can cause excess pressure at the CHRA which will cause smoking.

Yeah, yours isn't smoking too bad at all.

For comparison, here's mine (new Mazda engine (not a reman) rebuilt with a streetport and stronger apex seals) smoking while cold.

looks fine to me also, a little leakdown in the engine through the new plates and oil seals which should get better with time. add in the grey smoke which is too much fuel which will make the other smoke seem worse than it is.

if it persisted through warmup then you should be concerned.

Here is a short drive video, as you can see the blue smoke is there for quite some time. Is this normal? So far all the comments have been comforting. I am just hoping nothing has been damaged during, install or first minor ecu tune or first start up.

RX7 Short Drive Video by ALPSTA | Photobucket



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Yes there is an oil restrictor on the turbo. What's worrying me is the color of the smoke, because from shouldn't it be black or white if it's a condensation or a mixture problem? Btw you're right, all emissions stuff is removed incl. the cat.

The smoke in your video is white color mine is blue. Looks like yours is condensation or steam in winter start up.

Fingers crossed, I'm hoping this will get better with time and tuning.

keep in mind the exhaust, turbo and even engine will all be oil soaked and that will collect in the exhaust and take some time to burn off. if it keeps on after several hours of run time then i would probably start looking into crankcase ventilation and your turbo oil restrictor.

+1

twss...

:naughty:

Thanks for the replies guys, I'm relieved but I will still keep an eye on it after the 3k break-in miles. I hope it's not there by then.