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Old 02-18-2005, 05:18 PM   #1
Blue_71
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milky oil on pcv valve?

i was checkign everything out on the 69, just outta boredom and need of maintnance... the pcv valve and inside the left valve cover under the pcv is covered in milky oil, but the oil pan is shiny black oil..... what could cause this?
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1968 Chevy C30 157" WB Wrecker
1969 Chevy CST/10 SWB
1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed
1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205
1974 Chevy Custom Deluxe/10
1979 Chevy Custom Deluxe K10 farm truck beater
1989 Chevy K2500

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Originally Posted by Alan Jackson, Cause I'm a country boy
35s whinin on the asphalt, grabbin mud, throwin up some red dirt
R.I.P. Michael Stilts... I will always love and miss you brother! (9-12-80, murdered 4-9-05)
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Old 02-18-2005, 05:32 PM   #2
CPNE
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If you have some milky stuff on the pvc, and are not losing coolant, and drive a lot of short trips in colder climates, this is perfectly normal.

If this is the case, it just means that your oill is not getting warm enough to burn off the excess condensation in the oil, or you need to replace the pvc valve
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Currently on or near the homestead:

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67 Chevy 3/4 ton 2WD 402/auto (Business Hauler)
67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC)
68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC)
70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC)
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72 Chevy 3/4 ton 4WD Suburban (Parts Donor)
72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC)
81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler)
82 Camaro Z/28 355/Super T-10 (Pat's toy)
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Old 02-18-2005, 05:35 PM   #3
Blue_71
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that would be it then, ive been driving it on 1/2 mile trips only for about a month now b/c of problems that make me not trust it to go to town. im planning to adjust the valves anyways so ill take the valve covers off and clean them and put in a new pcv valve i have here
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ASE Master Certified-GM Trained-Mechanic
1968 Chevy C30 157" WB Wrecker
1969 Chevy CST/10 SWB
1971 Chevy Custom/10 (first truck) 350, NV3500 5 speed
1971 Chevy K20 Custom Camper 4x4 350 TBI, SM465/NP205
1974 Chevy Custom Deluxe/10
1979 Chevy Custom Deluxe K10 farm truck beater
1989 Chevy K2500

Quote:
Originally Posted by Alan Jackson, Cause I'm a country boy
35s whinin on the asphalt, grabbin mud, throwin up some red dirt
R.I.P. Michael Stilts... I will always love and miss you brother! (9-12-80, murdered 4-9-05)
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Old 02-18-2005, 08:13 PM   #4
Don R. Dodson
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Quote:
Originally Posted by Blue_71
i was checkign everything out on the 69, just outta boredom and need of maintnance... the pcv valve and inside the left valve cover under the pcv is covered in milky oil, but the oil pan is shiny black oil..... what could cause this?
You just described an engine that is not breathing. Clean out the PCV valve and oil breather and anything else that is involved in getting air into and out of the crankcase area.
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Old 02-18-2005, 08:22 PM   #5
green68c10
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A little bit of condensation is my guess.
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