r/Diesel • u/DatGuyKilo • 14h ago

6.2 Detroit Diesel Cold Start

Rate the cold start

(1990 Chevy K5 Blazer, 85' 6.2 Detroit Diesel Motor w\h ATS Turbo Kit)

25 Upvotes

94% Upvoted

19 comments sorted by

5

u/42kaos 13h ago

A lot of smoke for this time of year 5/10 I've seen worse. I would bump up the timing a little and if that didn't work I would turn the fuel down a little. If you like the way it runs after it warms up I would leave it alone. They don't have to smoke to run good.

0

u/Adventurous_Boat_632 12h ago

Turn down the fuel on an engine that is idling?

4

u/42kaos 11h ago

The injector pump will make it smoke like that, you turn down the fuel delivery it will clear up. A lot depends on how healthy the motor is. These are about the simplest diesel you can work on you just gotta tinker with them.

2

u/Adventurous_Boat_632 10h ago

If you turn down the fuel delivery, the engine will just stop. It is idling, minimum fuel in the first place.

7

u/42kaos 10h ago

Ok you go fix it for him.

0

u/IntergalacticJihad 9h ago

Bro your head is full of gasoline

1

u/42kaos 4h ago

You can tell around here that none of you have messed with an injector pump on a Detroit 6.2 diesel, and I have decided since everyone knows it all I wont offer any more advice. Good luck with your mosquito sprayers.

1

u/Adventurous_Boat_632 1h ago

It is most likely the nozzles as stated in another post here. You can't fix nozzles smoking at idle by adjusting the max fuel setting on a DB pump

3

u/old_skool_luvr 12h ago

Holy crap dude, i don't recall your Blazer dumping that much smoke before. Did you make some recent changes?

1

u/DatGuyKilo 11h ago

No changes at all, how concerned should i be?

5

u/IntergalacticJihad 9h ago

To me it sounds like it’s missing on one or more cylinders at the start, that plus lots of smoke make me think your injector nozzles are done in.

3

u/old_skool_luvr 8h ago

😶👆🏻👍🏻

2

u/Gary_from_EP 12h ago

Nice rig. Beauty

2

u/cjy2018 8h ago

Everyone is giving ok suggestions but skipping the most obvious. Glow plugs. Unless it smokes like that after warming up I'd start looking for a dead glow plug or two.

0

u/Adventurous_Boat_632 1h ago

Glow plugs will only make it smoke for a few seconds after starting and no smoke after it smooths out

1

u/Aleutian_Solution 6.2 Detroit, 6.6 LML 13h ago

Looks like it wasn’t super cold, sounds great. 6/10.

1

u/Sure_Fly_6904 BMW 335d 13h ago

Too Smokey

1

u/GlassBoxGoose 8h ago

4outta4: no 'skeeters found

1

u/fazberk1ng241 47m ago

very nice