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Oups, forgot oil cap... #5388596 03/29/20 11:46 AM
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M119 Offline OP
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Hi everyone,

I few months ago i was in a hurry and topped up my oil level but after a few kms i noticed smoke coming from the engine bay. I stopped and sure enough the oil cap was not properly put back on and maybe a liter of oil splattered everywhere.

I cleaned it how i could with rags and sprayed a fair amount of contact cleaner in each injector connector but some places are still drenched like the injectors loom and around the injectors. Will it damage the loom or the o-rings ? Or is my ego the only thing hurt really ? should i spray something to degrease it ?


1998 Mercedes W202 C180 - 155K kms (Daily)
1995 Mercedes S124 E250 Diesel - 480K kms
Re: Oups, forgot oil cap... [Re: M119] #5388625 03/29/20 12:30 PM
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Kira Offline
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Something makes me think injector o-rings and under-hood looms are resistant to oil.

However, the looms used have a finite life. They crumble away. If they're dry enough for your esthetics I suggest living with them whilst finding new loom. Gotta be heat resistant....I learned the hard way by using common electric shop loom. It looked real good for LESS THAN A YEAR.

Also, cleaning up thoroughly will help you in the event a leak springs up and needs to be located.

Re: Oups, forgot oil cap... [Re: M119] #5388639 03/29/20 12:42 PM
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M119 Offline OP
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I'm not sure, maybe harness is the right word, isn't the loom just the cloth around the harness ?


1998 Mercedes W202 C180 - 155K kms (Daily)
1995 Mercedes S124 E250 Diesel - 480K kms
Re: Oups, forgot oil cap... [Re: M119] #5388648 03/29/20 01:00 PM
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Kira Offline
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I always thought the "loom" was the black, ridged, split plastic wire gatherer. It sure isn't cloth.

I would wipe the wires themselves if oil was on 'em.

Re: Oups, forgot oil cap... [Re: M119] #5388661 03/29/20 01:21 PM
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Leo99 Online Content
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I did that once on the old Rav4. What a huge mess it makes. Wipe it down the best you can and don't do it again.


Without data you're just another person with an opinion. W. E. Deming


2004 Corolla 125,000 miles
2004 Rav4 399,852 miles (RIP)
2015 Camry 101,000 miles
2020 Rav4 6,000 miles
Re: Oups, forgot oil cap... [Re: Kira] #5388693 03/29/20 02:00 PM
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Mad_Hatter Offline
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If it's OE wiring you should be fine. The wiring under the hood should be suitable (tested) for the condition, which means heat & oil resistant. Wipe up as much as you can and move on..

Last edited by Mad_Hatter; 03/29/20 02:01 PM.
Re: Oups, forgot oil cap... [Re: M119] #5388694 03/29/20 02:05 PM
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M119 Offline OP
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Thanks guys for your help ! I feel better about it.


1998 Mercedes W202 C180 - 155K kms (Daily)
1995 Mercedes S124 E250 Diesel - 480K kms
Re: Oups, forgot oil cap... [Re: M119] #5388740 03/29/20 03:12 PM
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rubberchicken Offline
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I would be more concerned about the contact cleaner- that stuff can be very harmful to some plastics.

Re: Oups, forgot oil cap... [Re: M119] #5388743 03/29/20 03:22 PM
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Gokhan Offline
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CRC Brākleen brake-parts cleaner will wash away the oil and then dry instantly, without doing any harm.

[Linked Image from crcindustries.com]


2020 Toyota Prius Prime XLE plug-in hybrid, 2ZR-FXE engine, ~ 65 mpg on regular gasoline, ~ 5,000 mi
TGMO 0W-16 SN/RC Japan
OEM spin-on oil filter Japan
Re: Oups, forgot oil cap... [Re: M119] #5388785 03/29/20 04:41 PM
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M119 Offline OP
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Contact cleaner is formulated not to harm plastics while brake cleaner can really harm or at least tarnish them in my experience since it usually contains acetone, i learned it the hard way. If i was to remove every plastic part out of the way i would spray it on the block but im fine with a rag and spraying contact cleaner on contacts inside connectors.


1998 Mercedes W202 C180 - 155K kms (Daily)
1995 Mercedes S124 E250 Diesel - 480K kms
Re: Oups, forgot oil cap... [Re: M119] #5388788 03/29/20 04:43 PM
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atikovi Offline
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Go to the self service car wash with a can of regular Gunk. Spray the engine down with maybe a quarter of the can and let it sit a few minutes. Spray it off with the spray wand but without any direct blast to the connectors or wires.

Re: Oups, forgot oil cap... [Re: M119] #5388836 03/29/20 06:08 PM
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twouvakind Offline
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Kano Labs Floway


Just put the friggin' Maxlife in and be done with it!
Re: Oups, forgot oil cap... [Re: M119] #5388838 03/29/20 06:10 PM
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Gokhan Offline
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Originally Posted by M119
Contact cleaner is formulated not to harm plastics while brake cleaner can really harm or at least tarnish them in my experience since it usually contains acetone, i learned it the hard way. If i was to remove every plastic part out of the way i would spray it on the block but im fine with a rag and spraying contact cleaner on contacts inside connectors.

Yeah, it depends on the type of plastic and rubber. Test it on a small area first, as they say with fabric cleaners.

Chemical-resistance chart -- Plastics International


2020 Toyota Prius Prime XLE plug-in hybrid, 2ZR-FXE engine, ~ 65 mpg on regular gasoline, ~ 5,000 mi
TGMO 0W-16 SN/RC Japan
OEM spin-on oil filter Japan
Re: Oups, forgot oil cap... [Re: M119] #5388896 03/29/20 07:45 PM
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MCompact Online Content
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Many years ago I was on vacation and hit a pothole that ruined a tire. I took it to the Tire Kingdom in Hilton Head to have it replaced. Some imbecile working there removed the oil filler cap-for what reason I cant imagine-and I ended up with a huge mess to clean up. Of course the shop denied all responsibility, saying I needed to talk to the last person who changed my oil.


Mine:
2014 M235i
2009 Cooper Clubman
1999 Wrangler Sahara
1995 318ti Club Sport

Wife's:
2015 X1 xDrive28i M Sport


Son's
2009 328i

Buy what makes you smile...
Re: Oups, forgot oil cap... [Re: M119] #5388988 03/29/20 09:43 PM
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nlife Offline
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I've done that before. Sure makes a mess.

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