That's usually when I see some or if I push the gas at idle Kind of hard. The basemap could be part of the problem.

I'm not running any restrictor it's a t3t4 hybrid china turbo I always let it idle a couple min before shut off. So!

What's best guess? I see noooo smoke while gasing it.

Just a curious thought! Tune Saturday if turbo is fine otherwise it's time to swap on a real charger

 

If it happens on decel it is the valve seals, which is what it sounds like, low rpm when you shift would indicate it happens when the motor pulls hard vacuum.

 

So that's it, if it's decel the problem is def the valve seals? You don't have enough info here to cast a diagnosis in stone. There is more to it then that.

 

Valve seals don't have much mileage they were changed.

But it does smoke while decelerating

I just happen to notice some smoke I'd like to fix that problem.

 

Decel is obviously very high vacuum, the cylinder and head are put to the test under these conditions to see how well sealed up they are. Could be cylinder/piston or rings are damaged or tired. Or it could be something in the valve guide or seals is no good. I find that more often or not its the bottom end that has troubles.

It doesn't seem likely that your turbo could be causing it but you should pull the charge pipe and downpipe off to see. Do a hard decel or downshifts and shut it off immediately when you check things.

 

Fair enough the block is a real old but 190psi across on a cold day. The drain is a -10 braided line tap is like a bit over halfway to the very top of the pan.

Head was resurfaced and rebuilt years back to oem and put on the same
Block.

The oil isn't bad it's fresh.

It needs new plugs.

 

Try an oil restrictor first. Mine would smoke during decel mostly and it turned out I needed a restrictor

 

Yep, pull the downpipe off and check if oil has been leaking into the exhaust housing.

 

Shop might have something to restrict it. The pressure is quite low at those rpm like 20-30psi. If I take a charge pipe off and smoke comes out there going into the engine it's seals if it's dumping in the exhaust what's that? Also seals? Lol

I should mention in the years I owned this engine it burns no oil and doesn't smoke at all in the rpm range I can floor a spooled up gear with no smoke at all. Then I hit traffic a couple down shifts ohhh some smoke going by hmmmm? Lol officer wouldn't like it I don't thibk

 

yep....I still call valve seals, newer head or not, the seals may be leaking under hard vacuum draw, it could be other things such as turbo or rings, but from MY experience, decel smoke is usually caused by valve seals...

 

Ok so this will burn oil now then? Maybe it's because Im usin 10w30 reg and
Not my usually 5w syntec

If its getting old that's fine I'll still tune it and use it then.

Any tests I can do?

 

Pull your down pipe off and check is there is oil in the exhaust housing. You most likely need a oil restrictor on the turbo.

 

What about open it at the collectOr and check? Much easier. And wouldn't it smoke a lot at 60 psi + oil pressure flooring it? There's none

 

No, just unbolt the down pipe and take a look inside whilst the engine is off.

 

Since your boosting, Im sure I dont have to point out to you that the basemap is just to get your car to the tuner and nothing else.

It might play a role in your smoking, or could be a handful of other things..

go get a tune before you do some damage that will cost alot more then whatever is causing your smoking issues.

Im thinking rings.. WHY? cuz the OP is running a basemap and ill bet the engine has no crankcase vent and the rings are taking a beating. I f he didnt get a tune tells me quite alot.. So doing a proper crank vent isnt even on the horizon.

EDIT: Decel smoke can be seals.. but since the decel vacuum expands the rings outward, if theyre toast, oil will pass right thru

 

It could be, I think we should start with the most simple common things first though.

 

There you have it, Block is really old + Turbo + No tune. Could just be that youre rings are going. It could be alot of things, but since the block is old and the motor is not tuned thats my Vote.

If you are burning oil with conventional most likely you would burn even more with a synthetic. Using a thicker oil weight might help band-aid the problem

 

true.. looking at the pipe will tell alot. Lets see whats up 1st

 

I would wait and see if actually getting it tuned solves the problem.

 

Good call guys I may have started the beginning of lazy rings running it. I beat it like a couple hours (not hard just build boost) and drove it like 7 hours total. Running 13.5-14.5 cruising and 11.5 boosting

Tune tomorrow

The trick is why no oil consumption why no cloud when I stomp on it?

Boost is 3# off spring

It sounds like I drove a lot 80% is just highway at 3800rpm

 

Running your car without a full tune isn't a good idea in the first place. What you gotta think about is what changed from when it wasn't smoking to now when it is smoking?....you added a turbo. So more than likely its the turbo. Yes it could be rings or valve seals but if all was well before boosting it the usually the turbo is the culprit. Put in a restrictor and I bet it solves the problem. .065 is what's used on most smaller-ish turbos.

 

Good help everyone. Will update.

Tuner trouble it shoulda been tuned last week! Hopefully all go Saturday.

Motor was super healthy and still runs like a dream if I hurt the rings that sucks

Can't do a compression check atm

 

I pray to god...* please just pull the downpipe off*

 

Can't do that Either unless I drive 6 hours lol

Or pay the shop. Hoping it's the turbo needs a restrictor for when I tap the gas.

Will look into all suggestions, lol why ask what tests I can do I I'm
Not at a shop.... Just so I have an idea :p



Another example. I could rev to 6 grand and coast in gear but the smoke only
Comes if I'm driving slow and downshift to second for a red light. Or a tap of the gas in the driveway

Not a lot either just a very small cloud enough to see in my rear view then it's gone

 

6 hours!!! Damn that's a nice trip. I'd just try the oil restricter then and hope for the best.