LakunaKoil

Car is 99 Z28 104,000 miles

-Runs great
-Does not smoke
-Does not get hot
-Oil on dipstick is perfectly clear

Took car in for oil change last week and guy showed me the Oil Cap. There was a milky residue on the inside. So he doesnt know what the problem is and recommends an Engine Flush. So we do that and today I checked the cap again , looks the same.

The water pump has a leak (small) on the top/base, no clue if this is somehow related.

Can anyone tell me what this is ? I read that it could possibly be "condensation" but Im thinking something else is going on

Edit: I found that the PCV hose is broken in half almost . Could this be the cause of the condensation ?

im2fast4u98z28

iTrader: (1)

i would think just condensation. if the oil isn't milky then it would seem that the moisture is just in the valve covers. most likely will be the pcv hose.

LakunaKoil

I appreciate the response

Yeah I saw the PCV hose today is basically cut in half

Im hoping thats all it is

ulakovic22

iTrader: (12)

Just moisture in the engine. A lot of short trips?

im2fast4u98z28

iTrader: (1)

i would just check the oil every once and a while to make sure it doesn't start getting milky. just to be safe.

LakunaKoil

Define short ?

The weather has also been crazy here lately

Freezing one day and AC on the next

(South Texas)

fuseone

its just condensation alot of cars get that when it gets cold out.

ghettosled

my wife's weekly commute is only 3 miles each way in her jeep liberty. on the weekends we put on some decent miles, but when i change the oil, the cap it always white (almost like runny yogurt).

LakunaKoil

to work is about 20 min one way

But when Im not working and just at home, I might drive to the gym or to the store , 5 min away

Im off work 3-4 days a week

LakunaKoil

Another thing I should mention , Ive only had the car since September Ive never taken the oil cap off myself before now (always took it to shop for oil changes)

I cant confirm either way if this is a new problem

brad8266

iTrader: (23)

Thats you problem right there man. With the line cut the nasty crankcase gases have nowhere to vent to really so they just build up on stuff. Fix the line and the problem will go away.

bigsticksupra

iTrader: (3)

would you by any chance happen to be running Royal Purple engine oil?

ae13291

iTrader: (8)

for sure its condensation!! had the same problem!! i just changed my oil and drove the car on the free way a few times, pulling over to wipe the water on the cap! and after that no more milkey cap for me!

brad8266

iTrader: (23)

He said the PCV line is cut, that is his issue not short trips, besides he said he goes 20 min each way to work, thats plenty of time.

LakunaKoil

Changed out PCV valve and connecting hoses

Old PCV was completely clogged up

Will monitor

LakunaKoil

When it comes to optimizing the fuel economy delivered by your engine, all you need is an efficient PCV valve to do just the trick in increasing engine output. Typically located right at the exhaust manifold, your positive crankcase ventilation (PCV) valve is deigned to re-process still usable forms of fuel exhaust gases to extract more engine power and improve mileage. As the part is considered to be an emission control device, its great functionality has been proven to be effective as it is tuned towards helping you achieve your engine servicing project’s fuel efficiency goals. Aside from boosting combustion efficiency, your PCV valve’s old school applications also helps remove moisture to prevent developing sludge at the walls of stock emission gas tubing. By ensuring that your engine filter is kept efficient and effective like new, the part could also extend the service life of your engine and oil as contaminants and kept far from ruining the critical combustion operation settings of your ride. For preventive maintenance, you need to critically evaluate your stock PCV valve for replacement after a good 30,000 to 50,000-mile service. Because of constant exposure to harsh exhaust gases as well as engine heat, the part is expected to eventually become inefficient. Overextending the part’s service life will only result to the formation of concentrated hydrocarbons, carbon dioxide, and water vapor which normally promotes sludge formation. Without routine maintenance, the sludge could readily clog engine’s interior surfaces which promote condensation of corrosive acids that greatly contributes to engine wear.