BILLOWING white smoke

greenskeeper

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Here are some videos.

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Odd.
The blowby smoke looks bad, but it passes the up-side-down oil cap test since the cap stays in place IMO.

Engine sounds healthy (listening on a computer) IMO.

Problem started after "rebuilding" injectors if I recall, could be a problem with the rebuild.

Disconnecting one at a time while running and monitoring the smoke level would be my next move.
 

Kraig

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I disconnected each of the 4 uvch plugs and that did not seem to make much diff. I'll pull each injector plug and see how that works. How long should it run unplugged to notice a difference?
 

Kraig

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Ok so I finally narrowed SOMETHING down. I think I had a cyl trying to hydro lock when k tried to start it to pull it in the garage. So I pulled the passenger glow plugs and bumped the starter. I got bright red coolant shooting out of the cyl 7 hole. So I pulled inj 1 3 5 7 (all passenger l) and I pressurized the degas bottle up to 15psi. I was filling the hole with coolant. So I def have either a bad cup, head gasket or head. Any thoughts to narrow it down?
Since I'm this deep in probably going to change the cyl 7 cup and repressurize the system. If she holds them I should know it's fixed. If not, it's pull the head time to see if it's a gasket or a crack.
 

Kraig

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But I filled her up with fresh oil a week ago and it has idled maybe 10 minutes, for diagnostic purposes, since then and the oil was milky bad.
 

Kraig

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Here is the milk.
 

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Lezgo Brandon

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My 7tree had same smoke, oil fine, no other sign of hg issue minus the dead miss (and 300 psi in cylinders 7&8 compression test her yet? )
 

Kraig

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I tried to to comp test but the Snapon tester won't thread into the hole. But I did pressure with up to 15psi and finally got the number 7 to start filling the cylinder. So now I'm gonna replace the cup and repressure it. Then it is either head gasket or cracked head
 

greenskeeper

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I tried to to comp test but the Snapon tester won't thread into the hole. But I did pressure with up to 15psi and finally got the number 7 to start filling the cylinder. So now I'm gonna replace the cup and repressure it. Then it is either head gasket or cracked head
Sounds like a logical step. Could be the cup or a blown head gasket due to the coolant/fuel whatever leaking into that cylinder, especially if you said it "hydrolocked". Hoping it's not something bent.
 

Kraig

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I am getting coolant in the cylinder but I'm also getting something in my oil to make it chocolate milk. So bring that I can't see how a bad cup would cause coolant in the oil still seems like a bad head gasket or worse. I just wish there was a way to narrow it down.
 

catbird7

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You might try a borescope in that #7 cylinder. It's possible at some point (previous owner) may have snapped off a glow plug tip and that compromised the head gasket or even cracked something??? If so the borescope will quickly reveal dents in the aluminum piston. Another temporary solution would be a bottle of Blue Devil block / head gasket sealer.
 

greenskeeper

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You might try a borescope in that #7 cylinder. It's possible at some point (previous owner) may have snapped off a glow plug tip and that compromised the head gasket or even cracked something??? If so the borescope will quickly reveal dents in the aluminum piston. Another temporary solution would be a bottle of Blue Devil block / head gasket sealer.
This all started when the OP rebuilt the injectors/cups. OP said the truck was running great prior to that.

I would highly advise against any "fix in a can", especially block/gasket sealer.
 

Kraig

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I've always been hesitant to use those cure all in a can. When funds allow we are gonna replace the cup on cyl 7 snd reassess. Then it's pull the head.
 

Kraig

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Well... I finally found the issue at least one of the issues. I have a serious crack in cyl 7 wall. Dead cold engine with no pressure on the system you can see drops of water leak through the crack.
This does not explain why I had coolant in cyl 5 as well. Nor why I was getting coolant in the crankcase but the block is toast so thems the brakes.

Now I have to start another thread for diagnosing the original motor in this truck as it was blowing coolant out the degas bottle when it warmed up. I just swapped the engine instead of diagnosing it thoroughly.
 

Kraig

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Here's the evidence
 

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greenskeeper

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confused over the 2 engines. Was this the engine for which this thread was started?

It was running fine until the cups/injectors were "worked on" ?

Something major went wrong to crack the cylinder.
 

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