Question about 1994 Chevrolet K1500

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Smoke out ofoil cap

Smoke out of oil stick pvc

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Bad valve seals or guides, bad rings would cause exhaust gas to enter the oil pan

Posted on Feb 12, 2012

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Posted on Jan 02, 2017

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When i take off oil filler cap on my bmw it makes engine go lower on revs and then sometimes it cuts the engine when i puit it back on


This is typical of the BMW, the name for the part to be replaced is under many names from BMW it either called Oil drain back valve.Crankcase oil seperator or better yet they should stick to the name PVC vavle,When this valve rupture internally either two things happen you burn and smoke oil like crazy,or you get strong vacuum in the crankcase as you are experiencing. The valve is located under the intake toward the front of the engine to remove you will need to remove the throttle body,8_12_2012_4_17_26_am.jpg

Aug 11, 2012 | Cars & Trucks

1 Answer

My 2000 chevy cavalier 2.2 4 cylnder has an high amount of back pressure in the crankcase ,if u pull of the oil filler cap with motor running it spits oil out and what seems like smoke ,it doesnt run hot...


check the PCV valve, If its plugged you'll get the same results, most back pressure in motors of any type is oil pump, defective check valve in the filter section , try this, remove the PVC valve and the oil cap at the same time and block the vacuum line to the PVC hose, this eliminates the PCV system, and see if that reduces the back pressure, the only other thing it could be is bad rings ( just a note, did you recently start using synthetic oil ?)

Jul 03, 2011 | 2000 Chevrolet Cavalier

1 Answer

Smoke came out from the engine oil deepstick


NO worries about the smoke if there is no excessive smoke, the smoke is just internal pressure that the engine makes and is vented through the PVC valve and back into the intake. When you take the dip stick out, you give the excess gasses another way out of the engine other then the PVC lines.

Once again, NO worries unless there is signs or engine issues such as ruff idle and excessive smoke coming out from the tail pipe.

Thank you for using fixya and be safe.

Jul 02, 2010 | 2000 Mazda MPV

2 Answers

Blue smoke at exaust,oil coming through breeder hose


Check your PVC system my have stuck PVC valve

11_26_2012_5_45_18_am.jpg

Aug 11, 2009 | 1991 Toyota Camry

1 Answer

White smoke from motor


Checking oil when it's HOT with mask the coolant oil mix formation.
Check the oil when the engine is COLD. If it has creamy/milkshake like oil in the engine crack case then it's a real bad sign.
Check the oil cap when it's COLD. Like for the creamy/milkshake non-oil like cream.
Are you loosing coolant?
Keep a log book on the coolant lost.
Does it over heat or does it the engine ran hotter compare to few months ago?

To pin point a blowing headgasket you will need
1)coolant system compression tester
or
2)chemical reaction test for combustion test gas
If it's the org. engine from 1986,with over 86,000 then blown headgasket is a good possiblity.
Tow it to the shop and let the pro to do the coolant pressure test and combustion gas test.
A full head gasket job with head re-surface (if it can be re-use) is worth it.
Shop around on well estiblished independent shops.
Fix the blown head gasket at the first stage of failure can safe you thousand on a head replacement.

Jul 05, 2009 | 2000 Dodge Caravan

1 Answer

1982 FORD F100 PICKUP


It is possible that you do have bad rings and is causing an excess amount of crankcase pressure. Since you just have a hose hooked up now. Try running it to the big port vacuum fitting on the base of the carb.

Apr 26, 2009 | 1981 Ford F 100

2 Answers

Motor oil spitting out from the dipstick. No smoke, no blow by.


Have you checked for a PCV valve plugged? Not sure if there is one an that, but would sure look for one. Crankcase ventilation somewhere.

Feb 25, 2009 | 1999 Daewoo Lanos

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