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Forgot to replace Engine Oil cap #5320740 01/12/20 01:06 PM
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samiamz Offline OP
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I have a confession to make.

Last summer, one weekend, I was checking the oil level on the dipstick. Thought it was a bit low, so I opened the oil oil cap, placed it on the engine cover and added about 1/2 qt of oil. Then one thing lead to another, got called away to do something else and closed the hood. Two days later I open the hood for something quite unrelated and I realized that the oil cap is still sitting on the engine cover and obviously I had forgotten to replace it back. So I guess I must have driven about 60 miles with the engine oil cap opening open to the air!

The van ran well during the time and six months later, it is still running fine. I didn't see any debris deep in the opening and with regular city driving it is not a dusty driving environment. I don't detect any change in engine sound and a oil change done two months later last fall was uneventful too. So now, I am allowing myself think about what could have happened during the time the cap was off and if I should do anything different and watch out for anything, after this silly oversight.

Any thoughts, suggestions, advice is most appreciated. Thanks.

BTW: Van is a 2002 Honda Odyssey with 207,000 miles on it.


02 Odyssey (J35A4) - 206k
04 Camry SE V6 (3MZ-FE) - 174k
07 RX350 (2GR-FE) - 140k
Re: Forgot to replace Engine Oil cap [Re: samiamz] #5320743 01/12/20 01:11 PM
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JC1 Offline
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Did you get oil splashing all over the engine bay? If that were me, I'd do an oil change ASAP on it to get any contaminants out of the engine. I'm guessing your motor didn't die, so you are ok.


2015 Grand Caravan SXT Plus 0w-20 Pennzoil Ultra/Fram Ultra Filter
1997 Honda Civic CX 5w-30 PPPP/Fram Ultra Filter
Re: Forgot to replace Engine Oil cap [Re: samiamz] #5320745 01/12/20 01:11 PM
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SubieRubyRoo Offline
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I'd say your van is fine, and your late but still guilty conscience is hereby absolved of your crime. Considering your Odyssey is on the far side of 200k, it will live as long as it is intended to. Any sizable particulate would have been caught by the oil filter in short order during usage.


De omnibus dubitandum.
Re: Forgot to replace Engine Oil cap [Re: samiamz] #5320751 01/12/20 01:16 PM
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MolaKule Offline
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Replace the cap and maybe do an early oil change but that has happened to us all at one time or another so I don't think any damage has occurred over that short a mileage.

The only internal situation that may have changed is the PVC metering since there was no partial vacuum.

You may want to wash down the engine compartment since oil spray may have wetted the outside of the intake system or block. Don't ask me how I know this! LOL

Last edited by MolaKule; 01/12/20 05:41 PM.

I'm a Student Pilot. Frightening, isn't it?
Re: Forgot to replace Engine Oil cap [Re: samiamz] #5320759 01/12/20 01:36 PM
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VQ35DE Online Content
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I think did the same thing years ago .


2017 Mazda CX-5 GS AWD
Re: Forgot to replace Engine Oil cap [Re: MolaKule] #5320761 01/12/20 01:38 PM
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Mad_Hatter Offline
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Originally Posted by MolaKule
Replace the cap and maybe do an early oil change but that has happened to us all at one time or another so i don't think any damage has occurred over that short a mileage.

Gulty as charged..😂

Last edited by Mad_Hatter; 01/12/20 01:38 PM.
Re: Forgot to replace Engine Oil cap [Re: samiamz] #5320768 01/12/20 01:45 PM
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SatinSilver Offline
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It could have been worse where you drove the van through dusty/dirty areas, oil sprayed all over the engine bay, you forgot to add oil to the crankcase, forgot to install the drain plug, etc....

So in the scheme of things pretty minor. Rest easy. Probably barely a hiccup in the van's existence. For all we put vehicles through they're durable for the most part. Cars get run low on oil all the time so at least that didn't happen. Plus if it were more serious you would have posted about it right away.

Re: Forgot to replace Engine Oil cap [Re: samiamz] #5320789 01/12/20 02:07 PM
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Virtus_Probi Offline
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Ummmm….there's supposed to be a cap where you add the oil???

shocked2


LOL


2014 Forester XT, 111000 miles
Last Change;
M1 0W30 AFE
Tokyo Roki 15208AA170 filter
Re: Forgot to replace Engine Oil cap [Re: samiamz] #5320802 01/12/20 02:24 PM
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A_User55555 Offline
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I did this too on my old 1999 Deville. I was driving and I smelled the "open oil cap smell". I pulled over and saw I didn't put the cap back.


2011 Cadillac DTS. No the headgaskets have not blown.....
5W-30 Valvoline Full Synthetic with a Purloator Boss PBL25288 Filter
Re: Forgot to replace Engine Oil cap [Re: Virtus_Probi] #5320824 01/12/20 02:39 PM
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53' Stude Online Content
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Originally Posted by Virtus_Probi
Ummmm….there's supposed to be a cap where you add the oil???

shocked2


LOL



spank


2009 Toyota Camry LE

161,669 miles

Valvoline Maxlife Synthetic 5w20 Dexos 1 Gen 2 SN+
Fram tough guard 4386 filter
Re: Forgot to replace Engine Oil cap [Re: Virtus_Probi] #5320887 01/12/20 04:01 PM
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Linctex Offline
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Originally Posted by Virtus_Probi
Ummmm….there's supposed to be a cap where you add the oil???

shocked2

LOL


Eons ago, had a lady walk into autozone and wanted 4 quarts of oil for her 1988 Town Car (5.0 HO engine)...

Through casual visiting, she had NO IDEA the old oil gets drained out..... she just added 4 quarts every 5,000 miles.
crzy


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Forgot to replace Engine Oil cap [Re: samiamz] #5320927 01/12/20 04:44 PM
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hallstevenson Online Content
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Originally Posted by samiamz
The van ran well during the time and six months later, it is still running fine.

I think this answers your question(s).... Nothing to see here, move along. Your car is fine.

Re: Forgot to replace Engine Oil cap [Re: samiamz] #5320936 01/12/20 04:54 PM
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CR94 Offline
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I did that once for about 3 miles on my Mazda, which tossed out a lot of oil, because the cam sprocket was right under the fill opening. I don't think it could've gone 60 miles like you did.

As long as you didn't have that problem, probably no harm was done except a little extra dust sucked into the engine.


2011 Toyota Prius now at 109K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K
Re: Forgot to replace Engine Oil cap [Re: samiamz] #5321067 01/12/20 07:48 PM
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spk2000 Offline
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I did that several years ago and oil came out where the cap was at making a messy engine


96 Grand Marquis 203,000 mi
01 Sable LS Wagon 163,000 mi
02 Montero 191,000 mi
03 Sable LS Sedan 73,000 mi
Re: Forgot to replace Engine Oil cap [Re: samiamz] #5321084 01/12/20 08:00 PM
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walterjay Offline
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I did it years ago and drove on the interstate for a few hundred miles. Everything was ok.

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