This happended on a Pontiac Vibe. There is no knocking and neither the engine light nor oil light is on. I had an oil change a month ago (about 1000 miles) today I smelled burning oil and gas. When I opened the hood the oil cap was missing and there was oil all over the engine.
2007-01-30 13:32:48 · 11 answers · asked by JSK 1 in Cars & Transportation ➔ Maintenance & Repairs
If there is no evidence that the cap damaged the hole when it was blown off, then the cap probably was not screwed on tight enough.
I have heard of an oil cap being blown off of an engine that wasn't running properly. There was significant blow-by gas entering the crankcase and it ignited somehow and caused the oil cap and the pcv valve to blow out.
It doesn't sound like this is the case with your situation.
2007-01-30 13:54:57 · answer #1 · answered by sk33t3r 3 · 0⤊ 0⤋
Very good question. Well your crankcase builds up pressure and it is let out by a pipe, tubing, or a small filter on your headcover (where you put the oil in). Now when too much pressure builds up that little exit is not enough and It is trying to escapse through the oil cap. This usually mean that air is escaping past your piston rings and into the crank case but, it could just be that your tubing, pipe, ect. is clogged up(that would be an easy fix). Or is could be that a valve is stuck open or will not close because of carbon build up. So I would 1st get your compression checks on all cylinders and the one that has low compression is the one with bad rings.
This also will result in burning oil since the oil will escape in to the combustion chamber.
I just got threw dealing with that problem on a forklift. It has so much pressure that it blew a whole through the valve cap. (the forklift is pretty old.
2007-01-30 13:48:08 · answer #2 · answered by EricJohn004 2 · 0⤊ 1⤋
If the engine blew the oil cap off there certainly would be other signs - Just not likely. It would take a lot of force to blow it off and I'm not saying the engine couldn't make enough force because it certainly could, but other stuff would be damaged, too. And the car wouldn't be running fine after that.
2007-01-30 14:04:04 · answer #3 · answered by boogie2510 3 · 1⤊ 0⤋
could be blow by but I would look at a crank case building pressure because of a bad pcv valve look at your air filter if its nasty oily which I doubt then its blowby if not ask your mechaic about your pvc valve on older cars it was just a check valve that should rattle when shaken. Its cheap to replace or your mechanic left your cap loose
2007-01-30 13:45:53 · answer #4 · answered by Anonymous · 0⤊ 0⤋
I would say the mechanic that serviced your car did not put the cap on all the way or put it on at all. Make sure you check the oil level and fill as needed.
2007-01-30 13:42:41 · answer #5 · answered by mark t 7 · 2⤊ 0⤋
Seen it before. Cap not put on correctly. 10-4
2007-01-30 15:26:33 · answer #6 · answered by papabear 4 · 0⤊ 0⤋
It happened to me and it was not an oil cap installed wrong, it was an actually exploded.
2015-07-25 15:40:27 · answer #7 · answered by David 1 · 0⤊ 0⤋
Where would the PCV be located on a 2007 Ford Escape? And is there a diagram that I could also, that shows it?
2014-07-12 07:16:17 · answer #8 · answered by Rhonda 1 · 0⤊ 0⤋
clog PCV valve. will put some pressure but, not to that extreme.
You forgot to put the cap properly..plain and simple case.
2007-01-30 13:39:30 · answer #9 · answered by Anonymous · 0⤊ 0⤋
it wasn't on properly or they forgot to put it on. no damage has been done because the vehicle will not lose more than a qt. of oil.
2007-01-30 13:45:52 · answer #10 · answered by HONDALUVA 2 · 0⤊ 1⤋