Pushrod tube type4 still keeps leaking after replacing the seals

[05gh]

The engine number is GE044339.

Based on the photo of the pushrod tubes, the measurements indicate that I have the early model tubes. GE (late-model) is a export model and are never sold in Europe, so have to search for late model tubes.

Here in the Netherlands, complete kits are not available; the parts must be ordered separately. I have found a reseller in France that sells both green and black seals.

(stoterstangpijpjes translate to pushrod, and they are red )

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63 doubble door panel van
79 de luxe micro bus
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[raygreenwood]

[airschooled]

…does nobody else look at this picture and just see a plain old installation error?

Can we see a picture of the other side of this seal, in the head rocker area?

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[05gh]

[SGKent]

it is almost as if the o-ring rolled off on the top inside of the head side when it was installed. The lighting makes it hard but it looks like it pinched and did not stay all the way around the tube.
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[mikewire]

Hard to tell and e-diagnose from that one pic, but a great point regardless.

It could just be the smaller seal has pushed back in the groove.

Likely a combo of wrong parts and lack of finesse with the install. Edit, throwing zero shade, it can be confusing and it does take a steady hand.

Carefully clean up the seal area and tube grooves w/ degreaser or brake clean. Use the larger green Viton seals coated with some Curil-T (SGK mentioned it too), and when installing give the tube a small twist and shimmy to keep the seal from rolling, and I bet that would fix most of the issue.
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@countdowngarage
@bigskyeuro

1972 VW Kombi 9 Passenger Deluxe 221(5) w/ 2.0L F.I. VWAC swap
1965 VW Beetle Deluxe Bahama Blue

[05gh]

Update: I have ordered a new set of pushrod seals, and there are some small but critical differences (all seals are Viton).

Visually, the sets look identical.

Despite having the same specifications and looking visually identical, there is still a 0.5 mm difference when I place them on the tubes.
I think this is the cause of the oil leak. A side note: the existing set (red and green) has been in the engine for 5,000 km.
In the coming week, I will install this new set. I will keep you informed about the results.
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63 doubble door panel van
79 de luxe micro bus
Be the change that you wish to see in the world.

[05gh]

update (see youtube)
https://www.youtube.com/shorts/bBuDQStU4yM

On the left side is the red seal, and on the right side is the green seal. Both have the same specifications but are made by different manufacturers. The green one has a tighter fit, which I believe will help stop the oil leak. I have replaced the red seals with the green ones. I will run a few heat cycles and then check for any oil leaks.

I also did some calculations: the bore in the cylinder is approximately 31.7 mm. As mentioned earlier, the red seal measures 31.7 mm and the green seal 32.0 mm. This means the red seal will not be compressed, while the green seal will be compressed by about 0.3 mm.
_________________
63 doubble door panel van
79 de luxe micro bus
Be the change that you wish to see in the world.

[poundman]

[raygreenwood]