LB7: Lb7 Bad injectors how to tell if you have burnt pistons

[Kyfrye]

My 03 lb7 has had bad injectors for about 15000 miles and I have 225000 miles on my truck. I am looking to rebuild the engine but not sure what all I will need. The truck is smoking really bad all the time. I am wondering if there is any way to tell if I have holes in my pistons. I also need a seal kit for it because I leak about 1 quart a week. Any help would be great.

Thanks kyler

 

[Awenta]

Compression and leak down tests.

Leaking where? What kind of smoke?

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[mike diesel]

You'll know real quick if there is a hole in the piston.

 

[Kyfrye]

White smoke and the oil is all down the side of the engine on the passage side

 

[NC-smokinlmm]

Thats nornal for bad injectors on an lb7. Your making oil from the leaking injectors and its coming out the breather. White smoke is a totally normal symptom of bad injectors, if you had a hole in a piston you would know it...

 

[dirtydmax]

Don't run it with it full of fuel cuz u will wipe your bearings out.got some picts if you want to see what will happen.

 

[mike diesel]

I have a feeling this motor is already gone. Driving on bad injectors for 15,000 miles is rediculous.

Kind of reminds me of people who get a flat tire, swap the little donut spare tire on and all the sudden think they have a brand new tire they can put thousands of freeway miles on.

 

[TheBac]

Agreed with all mechanical points already posted. I feel you've probably hurt the engine from driving it so long with bad injectors. What's your oil pressure like at idle and driving?

 

[Kyfrye]

I know it's bad and I haven't had the money to fix it and I know it was going to kill me in the end by not getting it fixed right away the pressure idling is around 35 and 55-60 down the interstate

 

[WolfLMM]

How long has it been dumping oil out? There is a chance this motor is still good. It all depends on HOW dilluted your oil has been and how long it was run that way.

My truck had bad injectors for a while before we fixed it. Always kept the oil changed frequently.

Sometimes life gets in the way, and fixing things like injectors get put on the back burner.

 

[Kyfrye]

Last 7000 miles been loosing oil and I always make sure I have oil. How can I tell if I'm getting fuel in my oil and if I an what does that mean

 

[blue09dmaxx]

We're you actually losing oil as in the stick showed low?

 

[Awenta]

Smoke smells like fuel? How's the blowby

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[Kyfrye]

Yes the dipstick shows low and it doesn't smell like fuel