Noticed what looks like lithium grease inside the oil fill cap while i was changing the oil..what is it????

Pump must be primed before installation. Fill with oil or lithium grease and rotate the shaft until it pumps

Looks like mud ? What type coolant have you added ? Take the radiator cap off an look into it , do you see the same ? Have you ever had the cooling system flushed ? There was a problem with people adding green coolant to GM - Dex-cool ,orange ! Clog's the passages in radiator ,inside the engine , heater cores etc... Pull the oil fill cap on the valve cover an look at the under side of the cap , do you see brown frothy looking goop ? Coolant getting into the oil ! Why it called DexKILL

Not sure where your oil pressure sender is on that engine, but usually they are close to the filter. Or perhaps leaning on the top of the engine, like the fill cap, cracked something. Another possibility is a bad gasket on the new oil filter or overfill by 1 quart.

the gunk is chemical and dirt buildup that occurs through the years. if the gunk is really bad i would suggest doing a cooling system flush. it is a fairly simple do-it-yourself procedure and you can buy everything you need at your local walmart, parts store etc.

milky in the oil cap is ok -- this is caused by condensation and oil mixing inside the oil cap and it is nothing to be worried about.
now if you look at the dip stick and you see a milky looking oil on it -- and if you do a oil change and notice it to be milky - then this is a sign that you may have a blown head gasket, and this you need to worry about.


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If no leak is found inspect the inside oil fill cap to the engine. If a yellowish cluster of pudding I call it is stuck inside the cap that is caused by coolant mixing with the engine oil. That means your head gaskets are at fault and they are in need of a replacement

many things can cause an engine to over heat
Look for any collasped water coolant hose. That will cause overheating'
If the inside of the engines oil cap looks to have a creamy filling in it that will be from coolant mixing with the engine oil. Head gasket leak and can cause overheating
A clogged up heater core or radiator can cause overheating
A loose or worn seal on the radiator fill cap can cause overheating as well

it is start of blown cylinder head gasket, change it before you have engine over heat.

If it is milky it is coolant due to bad head gaskette.
If it looks like durt oil needs to be changed.
You can also check the oil dip stick fo deposition.
Please let me know if you need more info. I am here to help
Good Luck

Your front "ball & socket" joints are in dire need of lubrication. You need to do this:
Take the tires off, and look for a fill plug behind the hub, on the housing, above the ball & socket. Remove the plug, and fill it up with 80-90 gear oil. Replace the plug, do the other side.
What you have is a dry joint, and the clicking noise is coming from the u-joint (actually called a "Rzeppa" joint), inside the ball/socket/hub...a good lubrication will eliminate your condition. Hope this answers your question, please feel free to comment back with any other questions...And, thanks for choosing FixYa.