This 1996, 145 k, 3.0 Dodge Caravan of mine never stops me from be thinking of him. I’ve just arrived from work 11.3 miles regular roads. Everything seemingly was ok. As a routine, every 3 or 4 days I use to raise the hood from time to time due an oil leakage. But to my surprise this time I found th…

You probably have something very nasty going on. Just leaving the cap off will not spray oil all over your engine compartment. The fact there was little oil left in the crankcase proves it was forced out by severe pressure in the crankcase. This can be cause by a plugged PCV sytem, or more likely se…

Leaving the oil filler cap loose could have led to it falling out. Runing the engine with the oil filler cap off can lead to oil spraying all over the place. Fill it with oil and replace the filler cap. When was the last time the PVC valve was replaced? Replacing it might be a good idea. They a…

OUch! What Docnick tells me is scary… I drove the car till home without noticing any change in the engine sound or car behavior. Jeremy there is no signs of oil nither in the air filter nor in the filter housing and the PCV valve was changed just a month ago. I had Valvoline oil 10W-30 in the car …

I’ve always thought there was enough crankcase pressure in most engines to slowly but surely blow oil out of the oil fill if the cap was missing. It’s happened on my Chevy 350 CID where I accidently left off the oil fill cap, Julio. I lost 3 Qts over 100 miles. Over the years I’ve seen what I though…

You get lots of oil on the engine when you drive with the oil cap off. You need a new 710 cap. It says OIL when you turn it over.

Thank you Karl for your wise comment. For sure I’ll let you know about the decision taken. I’ve just bought another oil cap. I also checked if there was any evidence of damage due to the cap blowing off and I found none… And I tell you, unfortunatelly I am always suspicious about this old car of min…

I left my oil filler cap sitting nicely beside the fill a year or two ago. I drove about 100 highway miles before realizing it, but my oil level was normal and I saw no splatters of oil in the engine compartment when I checked. Just leaving the cap off doesn’t necessarily lead to oil on the engine…

Julio, I once had an old Mitsubishi Colt with a lot of blowby. The PCV sytem froze up because of all the water vapor (for every gallon gas burned, you get a gallon of water) and the screwed oil cap stayed on tight. The result was that the CRANKSHAFT SEAL BLEW!!, and it cost $400 to fix it. In retros…

It is okay to mix brands of oil as long as you use the right viscosity (10W-30). With some cars, there are moving parts right under the oil cap that can lead to spraying if you run them with the oil cap off. With other cars, that leaving the oil cap off doesn’t expose any moving parts and oil is u…

Oil cap blown away?

Maintenance/Repairs

the_same_mountainbike January 28, 2008, 11:54pm 4

I’m with Doc on this one. A cap left loose can pop off and cause some spray, but yours sounds like something more serious is going on. Like that blowby Doc mentioned, possibly even in combination with a gummed up PCV valve (which severe blowby can cause).

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Oil cap blown away?

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