When I open the oil pipe on my 1989 cadillac with 150,000 miles, smoke comes out. What does this mean? I?

Question

Is it dangerous? Thanks for your answers yesterday in which someone asked the type of car and mileage.

Answer 1

When the engine runs, some of the exhaust and unburned fuel gets past the piston rings and into the crankcase. Generally speaking, this gets drawn back in to intake manifold and burned when the engine is running, but if you take off the oil filler cap or pull out the dipstick, the fumes vent into the atmosphere. It's called blowby, as so many have called it here. I doubt if anyone knows what you are talking about when you refer to an oil pipe, but if you are referring to where you put oil in the engine or where you pull the dipstick out of, some of the smoke you see is the oil burning off the hot internal engine parts. It's all very normal, especially so on high-mileage motors. There was a time when there was no PCV (positive crankcase ventilation) system to burn all these vapors, and it was vented into the air. We've gotten smarter over the years.

Answer 2

I think your'e getting the right stuff from the other guys, so I'll just add my two cents worth -- no it's not dangerous, just annoying, there are some warranty approved additives on the market that help seal leaky piston rings ... I've got an old '85 chevy pick-up with 215,000 km on it (about the same as your 150,000, it's got a little blowby once in a while too, but it's still running fine ... if it ain't broke, don't fix it is my motto ... give it a little TLC and it should hang in there for quite a while yet, just don't be pulling horse trailers with it (lol).

Answer 3

All engines have what is known as BLOW BY. this is the gas that burns in the cylinder that escapes by the piston rings into the engine. You have a P.C.V. valve (Positive crankcase ventilation) which sucks these gasses from your engine and re burns them in the cylinders. That smoke is normal As long as it isn't coming out with the cap on then you are fine. If you want the P.C.V. valve can be replace fairly cheaply.

Answer 4

It means high mileage wear and a little bit of blow-by (engine case pressure ) caused by weak rings on the pistons... this is a normal condition in most cases and will require you keeping an eye on the oil level..... good luck

Answer 5

Blowby....It's normal on an older car, and there's not much you can do.

During normal operation, a small amount of unburned fuel and exhaust gases escape around the piston rings and enter the crankcase, referred to as "blow-by". [6] If these gases remained in the crankcase and condensed, the oil would become more diluted over time, decreasing its ability to lubricate.

Answer 6

Its possible you have a headgasket leak, but not to worry. In a normal tune-up, the pcv valve should be replaced, venting the crankcase oil pressure, and preventing the smoke. Just some ideas.

Answer 7

its a cadiallac they're all ****