6.2L Diesel White Smoke? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

my69camaro1 · 10-26-2010, 08:56 PM

Finally got a 1984 M1008 pickup running this past weekend that I purchased a few weeks ago. Had been sitting for at least 2 years. Half of the glowplugs are dead and it needs a quick shot of either to start when cold. Injection pump under intake leaks...

Anyway, the drivers side exhaust has a light haze at idle once the truck has warmed up. Light puff when first started then it goes away for a few min until warm. Punch it when warm and a large cloud will shoot out until you let off.

It was real bad when I first got it running but has gotten better the more I drive it. No smoke out pass side. Seems to drive fine, and motor power seems comparable to my past 6.2L trucks.

Doesn't look to be using coolant and the oil is clean.

palposity · 10-26-2010, 09:14 PM

Early Duramax engines had similar symptoms when the injectors were going bad. Another symptom was diesel fuel in the crank case. Older diesels don't like newer ulsd fuel - not enough lubricity. I typically add 1/3 of a bottle of Amsoil diesel concentrate with each tank of fuel on mine.
Posted via Mobile Device

87 V20 Scottsdale · 10-26-2010, 09:16 PM

I'm guessing it's one of the injectors.

10-26-2010, 08:56 PM	#1
my69camaro1 Young One Join Date: Oct 2003 Location: La Porte Indiana Posts: 138	6.2L Diesel White Smoke? Finally got a 1984 M1008 pickup running this past weekend that I purchased a few weeks ago. Had been sitting for at least 2 years. Half of the glowplugs are dead and it needs a quick shot of either to start when cold. Injection pump under intake leaks... Anyway, the drivers side exhaust has a light haze at idle once the truck has warmed up. Light puff when first started then it goes away for a few min until warm. Punch it when warm and a large cloud will shoot out until you let off. It was real bad when I first got it running but has gotten better the more I drive it. No smoke out pass side. Seems to drive fine, and motor power seems comparable to my past 6.2L trucks. Doesn't look to be using coolant and the oil is clean. __________________ 69 R/S Camaro 79 K5 86 M1008 11 P71 Vic 12 Ram 3500 18 Ram 2500

10-26-2010, 09:14 PM	#2
palposity Registered User Join Date: Sep 2009 Location: Syracuse NY Posts: 684	Re: 6.2L Diesel White Smoke? Early Duramax engines had similar symptoms when the injectors were going bad. Another symptom was diesel fuel in the crank case. Older diesels don't like newer ulsd fuel - not enough lubricity. I typically add 1/3 of a bottle of Amsoil diesel concentrate with each tank of fuel on mine. Posted via Mobile Device __________________ Project #1 "Pops"--1980 Chevrolet Scottsdale C10 3rd Generation in the same original owner family. GOAL: Restore to "almost" original. View Project Pops HERE Project #2 "Cletus"--1986 Chevy K20 4.10 Gear Ratio GOAL: Restore into a heavy duty work/plow rig View Project Cletus HERE - SOLD DD--2008 Duramax CCSB

10-26-2010, 09:16 PM	#3
87 V20 Scottsdale Registered User Join Date: Jul 2010 Location: Georgetown, KY Posts: 183	Re: 6.2L Diesel White Smoke? I'm guessing it's one of the injectors. __________________ Andrew 1987 V20 Scottsdale 383 TBI, SM465, NP208, 14FF, 4.10 1988 C1500 Scottsdale 305, 700R4, 3.08 1986 K30 Custom Deluxe 6.2, SM465, NP205, 14FF, 4.10



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.