BX2350 white smoke on start up

jbart

New member

Equipment
BX2350
Sep 16, 2023
1
0
1
MREBNIC2007
I have a 2008 BX2350 that I bought around 2012 and have had no issues out of the engine. It had the dash replaced at some point so I am not sure how many total hours but probably less than 2000. It starts up, but has to turn over a few times and has done this for quite some time bur with only a tiny puff of smoke. Over the last year or so, when starting, it seems to run rough for 2-10 seconds after start up, then clears up and runs fine. I have been loosing some coolant over the last year and replaced the radiator this year. It still tends to slowly fill ip the overflow and not pull it back in so I have to add coolant after about 4-6 hours of running. I'm not sure if these are related but this morning when I started it up it looked like a fog machine with enough white smoke to hide an elephant. I let it warm up running about 2200 rpm and after about 5 minutes the smoke almost gone. Any ideas?
 

Roadworthy

Well-known member
Lifetime Member

Equipment
L2501 HST
Aug 17, 2019
1,649
526
113
Benton City, WA
The head gasket would be a good starting point. It is probably not related to your coolant recovery problem. For that one I'd check the line between the radiator and recovery tank first and insure it's not leaking. Be sure the recovery tank itself has no cracks and the lid seals tightly.
 
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Lug66

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Lifetime Member

Equipment
LX2610HSDC, Z422KWT
Jun 7, 2023
116
67
28
SW Michigan
The coolant is being drawn in to a combustion chamber….white steam/smoke. Compression stroke is losing pressure into the cooling system which is why the expansion tank fills up. The coolant is being replaced by air/combustion gases.
 

kubotafreak

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Equipment
GRAND l6060, L3560, B6100, gr2100, tg 1860, g1800, g1900, g2160
Sep 20, 2018
1,048
393
83
Arkansas, US
A tiny puff of white smoke at startup is the unburnt diesel. It may be getting hot and pushing coolant from the overflow. The roughness on startup may be air. Look for any wet fuel feed/return lines.