Oil Tank Connections - 914-6 Options

[DennisV]

I'm wrestling with some final bits of the 914-6 oil tank connections. Can anyone confirm these parts and / or share photos of them installed?

• 45: 901-107-281-00, circlip (oil filter console) - I took this apart and don't recall there being a circlip needed. Does it go around #46?
• 48: 901-107-696-40, Sealing ring for Filler neck - Seem impossibly thick to allow the filler neck to connect with the tank neck. I tried smushing it down in the gap between the body, but it just didn't seem right. See photo below for new part I received.
• 78: 901-107-679-10, Sealing ring (lower side hose) - I can't find this for sale anywhere, nor know do I know what it looks like or specs to find a suitable replacement.

(IMG:style_emoticons/default/confused24.gif)

Thanks for any assistance.

[mepstein]

the circlip is used to secure the rubber collar. It's the same as what the 911's use. It goes inside the rubber collar - iirc.
The thick foam collar is correct. Some people just use foam tape. It's certainly expensive for what it is. It goes on the tank before it's mounted. So it's sandwiched between the tank and the inner quarter.
I'm not sure about the selling ring since I use A/N fittings but I seam to remember it's a second smaller foam washer. Could be wrong but I know there are two foam collars of different sizes. I have them in my stash if you need pics.

[DennisV]

the circlip is used to secure the rubber collar. It's the same as what the 911's use. It goes inside the rubber collar - iirc.

I'm not sure about the selling ring since I use A/N fittings but I seam to remember it's a second smaller foam washer. Could be wrong but I know there are two foam collars of different sizes. I have them in my stash if you need pics.

When you say "inside the rubber collar" is it the groove indicated by arrow in this photo?


A photo and / or spec for the foam washer would be super helpful.

Thank you!

[Krieger]

Hi Dennis,
I think I have a nos #78. Let me check. I also have something else that is suitable. That circlip in the photo goes in that groove and pushes out. Text me tomorrow if I forget.

[Luke M]

the circlip is used to secure the rubber collar. It's the same as what the 911's use. It goes inside the rubber collar - iirc.
The thick foam collar is correct. Some people just use foam tape. It's certainly expensive for what it is. It goes on the tank before it's mounted. So it's sandwiched between the tank and the inner quarter.
I'm not sure about the selling ring since I use A/N fittings but I seam to remember it's a second smaller foam washer. Could be wrong but I know there are two foam collars of different sizes. I have them in my stash if you need pics.

Hi Dennis,

Mark is correct. There's two foam seals (48 & 78) that slide onto the oil fill tube and lower return port on the tank. They get sandwiched between the tank and inner fender.
They are just a dust seal. The metal ring is used to hold the oil console seal in place. There's a groove in the seal that it snaps into and puts pressure on the seal to hold it in place. I made my own lower seal (78) out on some pipe insulation foam that's about an inch thick. I had some on hand but local hardware store should have something. Cut to fit, slide on return port and done.You'll have to push the tank into the inner fender to squeeze the seals and get the mounting studs through their mounting holes. My brother and I installed his tank this way. It's easier with two people. Hope this helps.

[mepstein]

Crazy expensive for two foam rings
A piece of plumbing foam could do the same thing

[DennisV]

There's two foam seals (48 & 78) that slide onto the oil fill tube and lower return port on the tank. They get sandwiched between the tank and inner fender.

I was wondering if #78 wasn't the item in the photo below, that keeps the hose from rubbing on the body metal it runs through.



You're saying it's a thick closed-cell foam donut like my photo of #48?

The oil tank is already in the car, and I have no plans to remove it. It was a really pain to get in there. I guess I can take a plastic trim tool and see if I can force that foam around the tubes and into the cavity.

The parts catalog drawings are misleading sometimes. From the drawing #48 looks like a thin gasket.

[rudedude]

I think your last pic #78 is # 18/2 in parts diagram. My other 2 tank seals were round in x-section foamish material.

[Krieger]

I have #78 as a NOS piece. It's about 4mm thick. I decided to use this PTFE piece on my race car. It is to prevent chafing. I was concerned about the rubber crushing under heat and heavy loads. After a dozen years on my race car there have been no issues with it. You're welcome to either one. You could loosen the tank, cut the ptfe one and slide it place.

[mepstein]

If you twist the tank into place, it shouldn’t be too much of a struggle. By the time I fitted mine, it had been in and out of the car a dozen times. But mine wasn’t a real six so the metal needed trimming.
Did you already install the hose on the bottom of the tank?

[DennisV]

I think your last pic #78 is # 18/2 in parts diagram. My other 2 tank seals were round in x-section foamish material.

You're right. My mistake.

If you twist the tank into place, it shouldn’t be too much of a struggle. By the time I fitted mine, it had been in and out of the car a dozen times. But mine wasn’t a real six so the metal needed trimming.
Did you already install the hose on the bottom of the tank?

The oil tank was an awful sweating cursing struggle of an install. I tried all the rotating twisting tips I could find. I think I ultimately had to beat it in with a rubber mallet. The hose is on and clocked before install. Thankfully.

So this is what #48 should look like installed? Just taking up the gap. Presumably #47 goes on that pipe to the right?

[Luke M]

I think your last pic #78 is # 18/2 in parts diagram. My other 2 tank seals were round in x-section foamish material.

You're right. My mistake.

If you twist the tank into place, it shouldn’t be too much of a struggle. By the time I fitted mine, it had been in and out of the car a dozen times. But mine wasn’t a real six so the metal needed trimming.
Did you already install the hose on the bottom of the tank?

The oil tank was an awful sweating cursing struggle of an install. I tried all the rotating twisting tips I could find. I think I ultimately had to beat it in with a rubber mallet. The hose is on and clocked before install. Thankfully.

So this is what #48 should look like installed? Just taking up the gap. Presumably #47 goes on that pipe to the right?

Yes, 47 goes on the breather hose tube.

[sixnotfour]

you need 2 of these, 90110766100

[aturboman]

.

You can see filter rubber collar circlip in this photo and the hose grommet going through the engine shelf.

[DennisV]

I have #78 as a NOS piece. It's about 4mm thick.

This is helpful Andy. Can you share the ID and OD?

Is it positioned on the engine bay side of the sheet metal (i.e., not touching the tank body), underneath nut #79? I'm really not clear what its purpose is.

@aturboman Thank you for the photos.

[Krieger]

It goes between the the tank and the body. Od is 45mm. I'd is 25mm. I could mail it to you if that works for your time frame. There aren't really any special features for this rubber.

[DennisV]

It goes between the the tank and the body. Od is 45mm. I'd is 25mm. I could mail it to you if that works for your time frame. There aren't really any special features for this rubber.

Again super helpful. Thanks. I appreciate the generous offer to mail it. Let me see what I can find here so I can keep trucking before I run out of time.

I added this to the parts vault. I hope you don't mind I used your NOS photo.

[930cabman]

I twisted and turned and ditto for several weeks (probably a few choice words mixed in) until I finally cut about 1/2" off the breather tube, slid right in.

PMS tank

Connections were mostly straightforward

[JmuRiz]

With all of the tanks around and factory /6 probably needing a new set...am I right in seeing that no one sells a whole kit of parts/seals/rubber to do the tank install? I guess I haven't scoured my parts to see what I'm missing.

If anywhere sells a whole kit for these parts, that'd be great...or if 911 parts can be used let us know where to buy.

[DennisV]

In case anyone else finds themselves on this path. The closest thing I could find at local auto parts or hardware stores was this. ID and thickness are pretty close. OD I trimmed with some shop scissors. Found at Ace Hardware plumbing aisle.