Coolant level decreasing, Smoke from Exhaust after engine replacement and repair.

10

Asked by Feb 05, 2017 at 11:58 AM

Question type: Maintenance & Repair

So I have a Chery QQ (CHINA) and 5 years ago I switched out its engine
with a DAEWOO TICO 0.8L Manual Carburetor Engine. All was running
good when recently the fuel pump stopped working and for some reason
the sensor did not turn on the Fuel Pressure indicator on the panel. The
engine ceased.

I was lucky enough to get the same engine (slightly used). On installation of
this engine two cylinders were not at pull pressure and turns out that two
Valves were bent. So we took off the head and put in new Valves, Valve
guides and valve seals and also replaced the Head Gasket. The ENGINE
condition from the INSIDE WAS CLEAN. Golden Engine no blackness or
carbon build up or anything. It was just like new.

When the car started the first time everything was perfect. EXTREMELY
SILENT engine, No vibration, no smoke.

On taking the car out drive was just perfect. Driving the car for about 30
Kilometers the Coolant level went down a little (like a decrease of 30
percent in the radiator bottle). We filled it up again and than again the
same thing happened. At this point I should mention that I used plain water
as the coolant. I have never in my life used anything else.

Anyways, I thought there could be a leak somewhere. Checked the engine
and the coolant wasn't getting in the engine.

Used the car for 3-4 days and everything was fine expect for the Coolant
level going down. My guess was a minor radiator leak.

Today when I started the car first time (Cold start) there was extreme
WHITE SMOKE from the exhaust with a strange smell. I checked the
engine oil and the oil was LOW. Checked below the car and there was NO
OIL LEAK. I filled up the oil again and started it up and drove for about 3
km and the smoke vanished. NO SMOKE NOW.

What's happening here? The water can't be entering the engine as new
Head Gasket was put in and its not mixing up with the oil.
Where did the oil go?  Oil level was at 70% when I filled it up. I did not fill it
up all the way. Could it be that the oil went in different parts of the engine
and that is why it was low and the smoke happened because of the low oil
level?

My initial guess is that it might be the Rings or the Valve seals? Really
stressed out right now.

6 Answers

76,555

I think you have a bad head gasket. Coolant is getting into the combustion chamber and causing the white smoke. If there is a coolant passage in the intake manifold it could also be at fault.

76,555

A cracked head is also a possibility.

10

Head gasket is new. Also note there is a very slight BLUE TINT to the smoke. The smoke is going away after driving the car and comes back if the engine remains off for hours. Could it be a faulty Valve seal? Oil leaking through the seal when the engine is off and than burning up as it starts up? There is no Coolant passage in the INtake manifold.

76,555

Just because the head gasket is new does not mean you don't have a problem. If the head was warped or cracked the new gasket won't seal properly. You probably also have a oil burning problem. I would suggest that you use an anti-leak in the radiator on the off chance it will slow your leak down.

76,555

If the white smoke is only on cold mornings and vanishes once the engine is warm that is normal. Your mention of "extreme" smoke made me think of a head gasket problem.

10

Thanks. Turns out it was the rings. The car starting loosing performance and burning a lot of oil. I changed the Piston Rings only. Starting it up and and everything is fine. Been 3 days and working perfectly. Engine performance is gradually increasing after RING replacement. I was under the impression that it will be on top performance from the start.

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