White smoke during start-up

[Dieseldude]

guys sorry po for my late reply, ganun pa din po van ko tuwing umaga. Now to answer your post one by one:
1.) Make and Model - 4m40 / '96 Spacegear 4wd 80k mileage
2.) Napansin ko lang na may parang film ng oil sa exhaust manifold connecting dun sa engine block, pero di naman nagbabawas.
3.) May nagsabi sa akin na mechanic na baka daw nozzle tip, but not sure ako dun.
4.) Pwede yung sinabi ni dieseldude pero 80k pa lang yung van ko and wala kong ibang problems except for that cold start with white smoke.

This could be an injection pump problem.......white smoke with rough idle during cold start is very common on 4M40s.

[Dieseldude]

guys sorry po for my late reply, ganun pa din po van ko tuwing umaga. Now to answer your post one by one:
1.) Make and Model - 4m40 / '96 Spacegear 4wd 80k mileage
2.) Napansin ko lang na may parang film ng oil sa exhaust manifold connecting dun sa engine block, pero di naman nagbabawas.
3.) May nagsabi sa akin na mechanic na baka daw nozzle tip, but not sure ako dun.
4.) Pwede yung sinabi ni dieseldude pero 80k pa lang yung van ko and wala kong ibang problems except for that cold start with white smoke.

This could be an injection pump problem.......white smoke with rough idle during cold start is very common on 4M40s.

[RedHotBlood]

kindly pm me your shop sir so i can bring my rig at matingnan na kung san talaga me problema. What do you sugget sir about it?

[rmpmla]

eto pa, pag start nanginginig yung engine pero after 30 to 40 seconds eh ok na yung tining (tunog) nung makina,

ano po ba RPM nyo during cold start ?

if 700~800 RPM, try nyo rev up during cold start from 1,000~1,200RPM. then after 30 to 40 seconds eh release mo accelerator.

Ganyan din observe ko sa ride ko. para iwas white smoke i rev it up to 1,200RPM during cold start.

try to google cold start compensator for diesel injection pumps.

HTH

[barako ba ma]

Correction lang po for everyone's knowledge on smoky exhaust. From the book
AUTOMOTIVE TUNEUP by William Crouse & Donald L. Anglin, chapter 34 page 365 ang reference.

SMOKEY EXHAUST : 1. Blue smoke - Excessive Oil Consumption
2. Black smoke - Excessively rich mixture. Meaning
more fuel.
3. White smoke - Steam in exhaust. Meaning there's
water.

hehehe please read the disclaimers on textbooks written by william h crouse and donald l anglin, books written by jack erjavec, by john remling. the texbooks, sorry to say have disclaimers and are broad, generalized and basic in coverage. if a diesel engine were burning oil it might show minimal bluish white smoke until the engine warms up to normal operating temperature.
3. White smoke-Steam in exhaust. meaning there's water; the by products of an efficiently burning engine are H2O and CO2. fuel (HC) combined with O2 typically yields H2O and CO2 and maybe if the combustion temperature exceeds 2500 degrees fahrenheit, will yield some NOx

[miked]

White smoke occuring during early morning engine startups is normal if and only if mawawala na yung white smoke after warm-up. The reason is that since diesels need high temperatures from compression to ignite the fuel e ang nangyayari sa umaga e masyadong malamig ang makina kaya fuel burns incompletely. at isa pa, the piston rings have not yet expanded to their working fit thus the insufficient compression.

Pero kung hindi mawawala ang white smoke even at loaded conditions, here are some of the possible causes:
1. Poor atomization ng fuel
2. Injection pressure too low or nozzle assy damaged
3. Insufficient compression pressure
4. Fuel injected too late
5. Fuel contains water.

From my experience with my pick-up (4D56), parating ganun lalu na ngaun malamig ang panahon. Nanginginig during startups at may white smoke pero after warm-up nawawala din. At ganun din yung traktora na ginagamit namin. White smoke at cold starts then wala na after warmup.

If ever blue smoke ang present, it means oil is getting past through the piston rings then into the combustion chamber