I got a hyundai D4BB starex, the problem started when we replaced the broken crankshaft. now the engine is hard starting and blows white smoke.

SOURCE: white smoke?

It's just condensation. Water will also drip from the pipe.

The colder it is, the worse the 'smoke' will be. I was in Vernal, Utah earlier this week, drove through -18*F weather, my truck never quit blowing white smoke.

And NO IT IS NOT YOUR HEADGASKET

SOURCE: F-350 turbo-diesel hard starting

Imagine the white smoke is unburnt diesel. Anybody standing in the middle of it will be able to tell you soon enough.

Most likely culprit is that one or two of the glow plugs aren't getting hot enough. Usually just that the plugs need replacing, but worth checking first that the busbar which runs between them all is getting +12V at the appropriate stage of the process.

A.

SOURCE: 2005 f350 blows white smoke when on the throttle hard.

Could possibley be a coolant leak, but no guranteed, if too much fuel is being injected for the amount of air entering, diesel fuel can cause a white smoke. I would check the air filter first. Is the boost gauge working, and if so how many PSI of boost are entering the engine?

SOURCE: my truck blows white smoke

Hello!
There are two differnt reasons for black and white smoke coming from the tail pipe.
Black smoke means fuel runs rich (car getting to much gas). Check fuel pressure/air filter.
In some cases the white smoke means car is burning oil or transmittion fluid. Have tem checked/replaced.
If you can feel a smelly smoke it can be catalytic converter.
In a worsest scenario if car blowing white smoke it can be engine coolant is getting into an engine cylinder from a bad head gasket ,or a warped/cracked head. So you need to keep your eye on coolant level and check your engine for overheat. Also might be good to check your oil for traces of coolant (on a dipstick it would be a milky substance mixture of oil and coolant).
Good Luck

Vincent G

• 2363 Answers
• Posted on Aug 23, 2009

SOURCE: I have a 1998 hyundai excel running rough as if

Is the heaps of white smoke come out of the tail pipe LONG AFTER the 15 minutes period?
To pin point a blowing headgasket you will need
1)coolant system compression tester
or
2)chemical reaction test for combustion test gas
If it's the org. engine from 1998,with over 120,000 then blown headgasket is a good possiblity.
Tow it to the shop and let the pro to do the coolant pressure test and combustion gas test.
A full head gasket job with head re-surface (if it can be re-use) is worth it.
Shop around on well estiblished independent shops.