Important!: What is this caused by

[egentry2991]

What causes this its in my oil cap

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[Adjusted]

Moisture or water in the crank - what kind of vehicle?

 

[06_LowTie]

Moisture or water in the crank - what kind of vehicle?

looks like silverado cap...

 

[Bootstrap]

Pretty common for 4.8/5.3 caps, but yours i a bit re yellow. Seen it alot

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[2005_Silverado]

Ive had 4 silverados...never seen that so Id disagree its common. Youve got water/coolant in ur oil.

 

[06_LowTie]

Ive had 4 silverados...never seen that so Id disagree its common. Youve got water/coolant in ur oil.

when i looked more into this i got the same answer.

 

[Bootstrap]

He's had 4 silvys, I've changed the oil in hundreds, I'm not saying it's a good sign, or there's not a problem, just that it's not uncommon to see. You should be able to find some answers on Google

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[silvr z]

He's had 4 silvys, I've changed the oil in hundreds, I'm not saying it's a good sign, or there's not a problem, just that it's not uncommon to see. You should be able to find some answers on Google

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All 5 silverados I see on the regular basis have a varying degree of this. Mine isn't bad but it's there. Never had much concern in it.


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[2005_Silverado]

Almost put money on cracked cylinder heads. "Castech" heads crack and leak coolant. Remove ur valve covers and rockers...look for a casting mark that looks like a battery. If you have that mark, chances are the head is cracked where it bolts to the block.

Look familiar?

 

[Oktain]

So if I have that... excuse for 243 heads?

Brb checking oil cap.

 

[2005_Silverado]

imo, pat...243s didnt have that problem

 

[silvr z]

Is that last pic where the "battery" will be?


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[2005_Silverado]

thats where it cracks

Casting location

 

[Adjusted]

it is not a common occurrence with GMs at all - unless you have a dodge motor swapped in :crazy:

 

[egentry2991]

Damn I Dnt like the sounds of this it is in a 07 gmc 5.3 I have no experience with takin the covers off or getting that far into it I just changed oil it was little darker than usual unless im just paranoid but didn't seem to have any water in it I cleaned cap gonna keep a eye on it and see if it comes back

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[static06]

Damn I Dnt like the sounds of this it is in a 07 gmc 5.3 I have no experience with takin the covers off or getting that far into it I just changed oil it was little darker than usual unless im just paranoid but didn't seem to have any water in it I cleaned cap gonna keep a eye on it and see if it comes back

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You have the oil consumption issue too?

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