Dimensions of Cam Seal Drift Tools (9995718 9995719) Topic is solved

[dikidera]

Interesting. And you are saying they shouldn't bottom out or you know, pressed in as far as they will go?

[crasbe]

Interesting. And you are saying they shouldn't bottom out or you know, pressed in as far as they will go?

Yes, as I wrote

Fortunately one of the cam shafts was still in it's original position and as you can see, the seal should not be pushed all the way in (at least on the B5254FS) as that would block the oil return channels (if they are not already blocked by oil coal that is...)
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As you can see, the oil passage on the top of the picture would be blocked.


I don't know if that is also valid for the later engines, if they have the same return ports.
The rear seal can be pushed all the way in though, as it has a separate cavity, as you can see in the cut section:

[dikidera]

Well damn...I do not remember how it was on my vvt version.

[crasbe]

So the new (to me) valve cover arrived from East Europe and it appears like the seals are not pushed in all the way either, judging by oil stains. They seem to sit flush with the housing originally. However the newer head does not seem to have the same type of oil return channels, so the seal can be pushed all the way in.

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The 9995719 tool was straight forward, as it is very similar to the 9995449 tool.
Likewise, I created three versions (flush, +1mm, +2mm) to achieve different depths.

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The VVT tool will follow later this week.

[crasbe]

Getting the VVT unit off the camshaft was not as easy as I expected, even my big 1000Nm Makita impact had to work a bit (even though probably a good bit of torque went into the non-impact torx bit).

But now it's off and I designed the last tool:

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However in this case, it really might not be a good idea to push the seal in all the way or much further than original, the wear edge is quite close to the chamfer of the VVT unit:

Some more pictures:

This tool is already published on Printables now: https://www.printables.com/model/129020 ... ft-9995718

The other one will follow soon, I have to take some pictures before publishing it.

[cn90]

For those who don't have the means to produce these 3D printed tools, you can make the tool from 2x4 wood. I posted the tricks on how to make it from wood in the axle seal DIY.

[BlackBart]

But now it's off and I designed the last tool:

However in this case, it really might not be a good idea to push the seal in all the way or much further than original, the wear edge is quite close to the chamfer of the VVT unit:

This tool is already published on Printables now: https://www.printables.com/model/129020 ... ft-9995718

The other one will follow soon, I have to take some pictures before publishing it.

This is very clever. You could make these and sell to the rest of us.

Question - is the thin inner extended rim of the tool pushing the rubber part of the seal out of the way in order to push the seal in? Then the rubber snaps back when the tool is removed?

We have a makerspace lab at our main library with a 3D printer. I haven't looked into size capabilities or whether the correct plastic would be available.

[crasbe]

This is very clever. You could make these and sell to the rest of us.

If anyone needs them I can print one for sure, but I don't want to start a webshop or anything.

Question - is the thin inner extended rim of the tool pushing the rubber part of the seal out of the way in order to push the seal in? Then the rubber snaps back when the tool is removed?

Not really, no. The inner rim is mainly for guiding the tool because the cam shaft sits lower than the seal. Otherwise the tool wouldn't have any guidance.
The seal sits with very minimal preload on the tool, so it doesn't fall off but it's not really moved in any way.

We have a makerspace lab at our main library with a 3D printer. I haven't looked into size capabilities or whether the correct plastic would be available.

Well the tool is only 65mm in diameter, nearly all 3D printers can print that. The material doesn't really matter, as long as it is somewhat stiff enough (flexible TPU wouldn't be a good choice, but otherwise it doesn't matter if it's PLA, ABS, PETG, ASA, ...).
You can find information about the print settings on the Printables page as well.

[crasbe]

The last piece of the puzzle is done now as well:

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As usual, published on Printables: https://www.printables.com/model/128824 ... ft-9995719

[crasbe]

Yesterday I finally changed the cam seal and before taking it out I measured how deep it sat. About 1mm:

Also, the drain hole won't be covered by the seal, so you could push it in all the way. However it's likely that the sealing lip sits past the VVT unit then.

This is the tool in action. However I ended up using the +1mm tool, because with RTV, the seal popped right back out.

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