Chevy and GMC Duramax Diesel Forum banner

1 - 7 of 7 Posts

·
Registered
Joined
·
160 Posts
Discussion Starter #1
Recently I have noticed that my truck has white smoke at start up. The truck normally doesnt do it. Im still loosing anti-freeze and dont know where it is going. My injectors are all in the normal range. Can the white smoke be due to a blown headgasket? If not what is the white smoke from?
 

·
Registered
Joined
·
74 Posts
just due to the nature of these Lb7s my guess would be the injectors ... do you know the last time they were done
 

·
Registered
Joined
·
160 Posts
Discussion Starter #3
I know about the lb7 with injectors but they all read ok. Can they still be bad?
 

·
Im Superrrrr!
Joined
·
14,517 Posts
White smoke is Almost always associated with Coolant....IE Headgaskets....in no way is it associated with too much or too little fuel...

Injectors tend to haze a black smoke....

Blue smoke tends to be oil caused by blowby/ worn piston rings.
 

·
Registered
Joined
·
113 Posts
My injectors tested great at the dealership but had smoke on start up and diesel in the oil. Headgaskets were also weeping down the back of the block. Never a puddle, just needed to top off the coolant tank every couple weeks. Got a quote of around 8k for injectors/head gaskets from the dealership so just ended up doing the repairs myself.
 
1 - 7 of 7 Posts
Top