What causes cylinder wear like this?

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squaredeal91

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It was a spray can - the label looks like its changed a bit. My friend ordered it from someplace in Cinci. He's been gone about 6 yrs now, so lots has probably changed.
Oh that would be better for sure. Found this, recall the color?
 

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squaredeal91

Full Access Member
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Location
Cave junction Oregon
First Name
Greg bush
Truck Year
1991 SB
Truck Model
K30
Engine Size
5.9 Cummins 12 valve
@doppelganger I got the hylomar in today. Might not use it today but plan to soon. Just wanted to test it out for visual.
 

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squaredeal91

Full Access Member
Joined
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Location
Cave junction Oregon
First Name
Greg bush
Truck Year
1991 SB
Truck Model
K30
Engine Size
5.9 Cummins 12 valve
I know it started out as a cylinder question but the project is Just about done. Got some sanitizing of wires and hoses but was able to find a hose diagram and some are really hard to get to and Im finding that allot wasn't hooked up and missing hoses. Got some extra hoses to try and complete it. It never ran like it should especially at idle. It idled choppy like it's got a bigger cam, just dirty and not smooth like it's got a vacuum leak. I'm thinking that contributed to the gasket blow and the gasket might have been a cheap one. Also I can feel they took off too much material on the head in-between cylinders on at least one of them. I could feel it with my finger a little. I'm counting on the hylomar lol. It seems like really good stuff and I wasn't too shy with it. It's had a couple days to set after torque.
In the process we found 2 broken plugs and 1 really melted spark plug wire. Totally destroyed plug and wire boot getting it out. I read somewhere that these engines do that to plug wires somewhat commonly. @Originalthor ever heard of that?
 

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