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Piece of oil cap gasket fell in fill hole. #4467253
07/22/17 03:29 PM
07/22/17 03:29 PM
Joined: Jul 2010
Posts: 220
Ca
OceanRuns Offline OP
OceanRuns  Offline OP
Joined: Jul 2010
Posts: 220
Ca
Vehicle: 1983 Ford Fairmont, 3.3, 6 cylinder.

I went to top off the oil, and a gasket that is on the bottom of the cap broke in two. One half fell in the fill hole. I was able to fish most of it out. It was quite brittle, and some appears to have 'gone in'. In the photo below, the amount that went in probably isn't that much greater than the small piece on the right (could be a little more, or less. And, there are also a few really small pieces that broke off when I was fishing the rest out).

One can break this fairly easily by hand, but of course once the pieces are small enough, they're hard/coarse. I am not sure what this is made of. It seems like a gasket that is meant to be replaced?

So, given that some went in, should I worry? Or, am I all good.

Also, does the cap really need such a thing?

Thanks for any advice. (Quarter for comparison.)


Last edited by OceanRuns; 07/22/17 03:37 PM.
Re: Piece of oil cap gasket fell in fill hole. [Re: OceanRuns] #4467257
07/22/17 03:33 PM
07/22/17 03:33 PM
Joined: Dec 2016
Posts: 279
Sav ga
NStuart Offline
NStuart  Offline
Joined: Dec 2016
Posts: 279
Sav ga
It will be waiting for you to remove it next time the valve cover is removed


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Re: Piece of oil cap gasket fell in fill hole. [Re: OceanRuns] #4467260
07/22/17 03:37 PM
07/22/17 03:37 PM
Joined: Jun 2016
Posts: 552
South OZ
KL31 Offline
KL31  Offline
Joined: Jun 2016
Posts: 552
South OZ
Have you started the car since that bit fell in? If not, I'd pop the valve/rocker cover and get it out. I've never had a car with an oil cap gasket. You can try without one and check for leaks I suppose.


95 MX-3 2.5L|Shell Helix Ultra 5W40|Wix 51356
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Re: Piece of oil cap gasket fell in fill hole. [Re: NStuart] #4467262
07/22/17 03:38 PM
07/22/17 03:38 PM
Joined: Jul 2010
Posts: 220
Ca
OceanRuns Offline OP
OceanRuns  Offline OP
Joined: Jul 2010
Posts: 220
Ca
Originally Posted By: NStuart
It will be waiting for you to remove it next time the valve cover is removed


I wasn't planning to do that anytime soon, unless it's really needed.

Re: Piece of oil cap gasket fell in fill hole. [Re: OceanRuns] #4467263
07/22/17 03:39 PM
07/22/17 03:39 PM
Joined: Oct 2004
Posts: 8,334
Cincinnati, OH, USA
bullwinkle Offline
bullwinkle  Offline
Joined: Oct 2004
Posts: 8,334
Cincinnati, OH, USA
Yes, it needs it, another oil fill cap will be needed (or a gasket if there is one available). If the chunk was small enough to make it down a drainback hole, it might find its' way into the sump and the oil pickup. Any chance of using a cheap borescope to look inside the valve cover and find it?


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Re: Piece of oil cap gasket fell in fill hole. [Re: KL31] #4467265
07/22/17 03:40 PM
07/22/17 03:40 PM
Joined: Jul 2010
Posts: 220
Ca
OceanRuns Offline OP
OceanRuns  Offline OP
Joined: Jul 2010
Posts: 220
Ca
Originally Posted By: KL31
Have you started the car since that bit fell in? If not, I'd pop the valve/rocker cover and get it out. I've never had a car with an oil cap gasket. You can try without one and check for leaks I suppose.


Yes, I drove it home from WalMart (where this happened). No oil came out. The crankcase has positive pressure right? So the gasket would conceivably be to prevent that happening?

Re: Piece of oil cap gasket fell in fill hole. [Re: bullwinkle] #4467268
07/22/17 03:43 PM
07/22/17 03:43 PM
Joined: Jul 2010
Posts: 220
Ca
OceanRuns Offline OP
OceanRuns  Offline OP
Joined: Jul 2010
Posts: 220
Ca
Originally Posted By: bullwinkle
Yes, it needs it, another oil fill cap will be needed (or a gasket if there is one available). If the chunk was small enough to make it down a drainback hole, it might find its' way into the sump and the oil pickup. Any chance of using a cheap borescope to look inside the valve cover and find it?


The way the fill hole is constructed doesn't show any of the internals. It's an angled piece of metal to make the oil flow in. That's really all one can see. I wouldn't be able to get something around that. I know in some cars you take the cap off and can see quite a bit.

Re: Piece of oil cap gasket fell in fill hole. [Re: OceanRuns] #4467271
07/22/17 03:51 PM
07/22/17 03:51 PM
Joined: Jan 2017
Posts: 1,139
USA
ArcticDriver Offline
ArcticDriver  Offline
Joined: Jan 2017
Posts: 1,139
USA
I always worry about this with the airtight aluminum seals and remove them fully before pouring.
But I also pour first into a second container....one of those big metal oilcans with the long trigger release spout.


Multiple Diesel and Gasoline vehicles
Re: Piece of oil cap gasket fell in fill hole. [Re: OceanRuns] #4467383
07/22/17 05:57 PM
07/22/17 05:57 PM
Joined: Oct 2014
Posts: 12,582
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 12,582
Idaho
The older Ford engines had those gaskets. They are needed so dirty air will not get sucked into the engine. PCV valve.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Piece of oil cap gasket fell in fill hole. [Re: ArcticDriver] #4467404
07/22/17 06:19 PM
07/22/17 06:19 PM
Joined: Apr 2004
Posts: 656
NJ
raaizin Offline
raaizin  Offline
Joined: Apr 2004
Posts: 656
NJ
Originally Posted By: ArcticDriver
I always worry about this with the airtight aluminum seals and remove them fully before pouring.
But I also pour first into a second container....one of those big metal oilcans with the long trigger release spout.


I did this many years ago on a 1990 t-bird with a 3.8. Car went over 200k miles. I guess it wasnt an issue.

Re: Piece of oil cap gasket fell in fill hole. [Re: OceanRuns] #4467406
07/22/17 06:20 PM
07/22/17 06:20 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
That'll get sucked into the oil pickup screen. When the oil pressure drops down to near zero, you'll know why.

Re: Piece of oil cap gasket fell in fill hole. [Re: OceanRuns] #4467413
07/22/17 06:26 PM
07/22/17 06:26 PM
Joined: Aug 2003
Posts: 2,552
DELAWARE
Hootbro Offline
Hootbro  Offline
Joined: Aug 2003
Posts: 2,552
DELAWARE
Quote:
Also, does the cap really need such a thing?


You got 34 years out of that one. Treat her to a new cap, she has earned it.


2018 RAM 2500 Cummins 6.7L (Delvac 1300 15W-40)
2017 Jeep Renegade 2.4L (Idemitsu 0W-20)

Re: Piece of oil cap gasket fell in fill hole. [Re: Merkava_4] #4467434
07/22/17 06:47 PM
07/22/17 06:47 PM
Joined: Jul 2010
Posts: 220
Ca
OceanRuns Offline OP
OceanRuns  Offline OP
Joined: Jul 2010
Posts: 220
Ca
Originally Posted By: Merkava_4
That'll get sucked into the oil pickup screen. When the oil pressure drops down to near zero, you'll know why.


So you're saying it will block oil flow?

Re: Piece of oil cap gasket fell in fill hole. [Re: OceanRuns] #4467437
07/22/17 06:50 PM
07/22/17 06:50 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Originally Posted By: OceanRuns
So you're saying it will block oil flow?


If it sticks to the screen it will.

Re: Piece of oil cap gasket fell in fill hole. [Re: CT8] #4467451
07/22/17 07:01 PM
07/22/17 07:01 PM
Joined: Jul 2010
Posts: 220
Ca
OceanRuns Offline OP
OceanRuns  Offline OP
Joined: Jul 2010
Posts: 220
Ca
Originally Posted By: CT8
The older Ford engines had those gaskets. They are needed so dirty air will not get sucked into the engine. PCV valve.


The way this particular cap is set up is the cap itself has a rubber hose going directly to the intake. It seems positive pressure is being vented out through the cap itself.

So, would the gasket be there to ensure the gases vent through the hose rather than just out to the atmosphere? How would anything be sucked in? Forgive me if I am misunderstanding, just would like to know how it works.

I do intend to replace the gasket if I can find one.

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