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Isuzu kb 250 4ja1 engine got blue smoke on exhaust

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SOURCE: My isuzu 4JA1 engine tends to exhaust white smoke

White smoke means that you have a coolant leak. Two possible causes for that - either the head gasket is punctured and must be replaced or the head itself is damaged and must be welded by an expert. 
Either way the engine must be dismantled to make a full diagnose and repair.

Posted on Aug 02, 2010

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My isuzu kb 280 dtlx produces blue smoke and misfires it still has power thouh bt when u rev it the smoke turns greyish black and its conduption is very heavy


Blue smoke means burning oil most likely due to worn piston rings. Black smoke means car is running rich too much gas being burnt

Aug 04, 2016 | Isuzu Cars & Trucks

2 Answers

My isuzu kb300 2005model gives white smoke and sometimes it cant accelerate and engin light comes on


KB
Welcome to the USA Fixya.com forum!
we don't have KB here. sorry.
History.(1 line, all bad)
2005 - Isuzu dealers in the United States have only one model, the Ascender SUV,
and guess what?, it's a rebadged GM car here, no more cars here, real isuzu.
KB are in Africa, Australia and in EUROPE not here in USA. so no books here to cover it.
nor is it covered here, at our great ,Mitchells online.

The KB300 is a 2.999 liter diesel, some are TDI. (most?)
and is called the 4JJ1-TC. (t= turbo)
That is direct injected, (means check turbo , and scan it first) after checking fuses.
The Check engine light on, same deal.
Check filters. for fuel and air.
2004 the D-max , family , introduced the DDI-ITeq common rail diesel engine.

So next time post your country.
And all symptoms.
power loss?
smoke?
Noises?
warning lamps.
etc.

Feb 27, 2016 | Isuzu Cars & Trucks

2 Answers

Why is my 2000 kia sephia blowing blue smoke from the tailpipe. it has 86,000 miles. the check oil warning light is on even though the dipstick reads full.


The most common cause of blue exhaust smoke is oil leaking past engine seals and into the cylinders where it then mixes and burns with the fuel. This is most frequently seen in older or high mileage cars with worn seals and gaskets. It only requires a very small amount of oil leaking into the cylinders to cause excessive blue exhaust smoke.

Blue exhaust smoke only at start-up can indicate worn piston seals or damaged or worn valve guides which may also cause a rattling noise. An external engine oil leak can drip onto hot engine and exhaust parts causing what appears to be blue exhaust smoke. Other possible causes of blue exhaust smoke include: piston wear, worn valve seals, a dirty or non-functioning PCV valve, worn piston rings, an intake manifold gasket leak, worn engine oil seals and possibly even head gasket failure.

Oil leaking into the cylinders can cause a rough idle, misfire and fouled spark plugs. In addition, a reduction in power and oil loss can be indicators that the blue exhaust smoke is caused by an internal engine oil leak. Internal engine oil leaks can also allow fuel to mix with the oil in the crankcase which will degrade the oil and prevent it from adequately protecting the engine.

Operating a car with a severely dirty oil filter, air filter or improperly functioning PCV valve can also sometimes result in engine oil blow-by, oil loss and blue exhaust smoke. Periodically checking the engine oil level with the oil dip stick will indicate if there is excessive oil consumption. Higher viscosity engine oil can sometimes temporarily reduce the amount of blow-by; however, this is not generally recommended. Excessive blue exhaust smoke indicates a possible internal engine oil leak that should be inspected by an ASE certified mechanic.

Dec 08, 2014 | 2000 Kia Sephia

1 Answer

Engine concern


Smoke (blue or black) or steam (white)? White smoke is really steam that is caused by water leaking onto hot surface. Could be leaking from hose running to heater coil under dash, or something else. Check radiator water level to make sure water level is ok. Blue smoke is oil burning. This could be dangerous, caused by similar scenario of oil leaking on a hot surface (from a gasket leak, etc), or exhaust fumes. Black smoke means something is actually burning and could indicate fire. Black or blue some could fill vehicle cabin with toxic fumes, even if you don't smell anything bad.

Jan 02, 2014 | 1995 Isuzu Trooper

1 Answer

Blue smoke coming from Exhaust


The rings are probably bad

Aug 18, 2012 | Isuzu Cars & Trucks

2 Answers

I've been told by my trusted neighborhood mechanic that my '95 Isuzu Trooper LS (3.2 L) has a warped head gasket (has been running low on oil- now runs very rough & spews out blue smoke from...


Blue smoke is oil burning, white steam/smoke is coolant burning, it will be a sweet smell.
You have a choice, repair the head gasket (if there is coolant in the oil, the bottom end needs rebuilt also) which is around,$300-$1000 depends if a garage or you do it, the problem with doing a head gasket is there is no garantee, if you replace the engine with a used engine you have a 90 day/ 1 year warantee, your choice. about the same cost.

Sep 25, 2011 | Isuzu Trooper Cars & Trucks

1 Answer

My isuzu 4JA1 engine tends to exhaust white smoke


White smoke means that you have a coolant leak. Two possible causes for that - either the head gasket is punctured and must be replaced or the head itself is damaged and must be welded by an expert. 
Either way the engine must be dismantled to make a full diagnose and repair.

Aug 02, 2010 | 1995 Isuzu Pickup

1 Answer

Isuzu trooper 2003, skyroof version, 4jx engine. Diesel and oil mixing in engine. It might be the electronic fuel injector o ring. Need help badly. Isuzu alabang is giving me some pain. Big Black smoke...


If you are sure that the engine oil is coming into the combustion chamber, then you have to overhaul the engine. After the overhaul is done, have it calibrated and and clean the exhaust pipe to get rid of the black smoke. And! remember, for diesel engines a big black smoke will always come out the exhaust if you suddenly step on the gas too deep and then over-revving it. (I mean always, that's why roadside emissions people are so stupid when stepping on the gas, they always step on it suddenly and over-rev it, it's a sure fail)

May 25, 2010 | 2002 Isuzu Trooper

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