Bad example for injector installation
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Cargo Master
Joined: Oct 2018
Posts: 2,811
Likes: 1,909
From: unfortunately Germany
Bad example for injector installation
I have an unpleasant example of what can happen if the injector installation is not carried out properly. The truck was brought to me.
According to the owner, the engine knocked and then stopped and could no longer be turned over with the starter motor.
As you can see in the video, the copper washers under the injectors are almost completely missing. The question I have is: where can the fragments escape to?
According to the owner, the engine knocked and then stopped and could no longer be turned over with the starter motor.
As you can see in the video, the copper washers under the injectors are almost completely missing. The question I have is: where can the fragments escape to?
Fleet Owner
Joined: Nov 2003
Posts: 27,916
Likes: 3,636
Man that is pitiful! Sure makes a person wonder what the story is for sure. The copper washers can oxidize when improperly torqued to begin with (exposure to heat and combustion gasses). I haven't ever really looked it up, but cylinder gas temps can probably get to within only a few hundred degrees from the copper melting point.
Hotshot
Joined: Dec 2014
Posts: 17,832
Likes: 3,119
From: Jersey Shore
Diesel gas temperatures can reach about 3,000ƒ, while the surfaces are much, much lower. I think pistons are around 500ƒ. Copper is at 1984ƒ, which is easy to remember due to the book by Orwell.
Fleet Owner
Joined: Nov 2003
Posts: 27,916
Likes: 3,636
Good memory aide there on 1984. The possibility of the combustion gas (a lot higher than Exhaust Gas Temps in the manifolds) getting that high is a real reminder of just how important proper injector hold down torque is, and also the need to clean the cup surface before injector installation!
And we know what CAN happen when a cylinder "over fuels"!
And we know what CAN happen when a cylinder "over fuels"!
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pilgrimbizket
1999 - 2003 7.3L Power Stroke Diesel
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Nov 3, 2022 10:46 PM
