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1979 VW Beetle - Restoration

Murbella – Day 39 – New Throttle Body Seals

Posted on 2020-06-11

The Harwal oil seals arrived the other day so I test fit them into the throttle body.

1979 VW Beetle - Restoration
1979 VW Beetle – Harwal Oil Seals

These are the same seals that the guy on The Samba used on his bus throttle body.

Now they aren’t perfect fits as they are not a 1:1 replacement part.

However, I think they’ll do at keeping the seal sound, and also acting as s bushing for the shaft.

1979 VW Beetle - Restoration
1979 VW Beetle – Harwal Oil Seals

I still have some playing around with the fitment.

1979 VW Beetle - Restoration
1979 VW Beetle – Harwal Oil Seals

I’m trying them both ways, as either way will keep out debris and not allow any pressure/air to leak through.

1979 VW Beetle - Restoration
1979 VW Beetle – Harwal Oil Seals at TPS sensor

The one at the TPS sensor fits best.

I’m thinking that if I just use a little bit of lithium grease on the inner diameter, the throttle body butterfly will move smoothly.

I’m not going to do a full mockup until I have all those small linkage parts fully cleaned. Maybe later today I can try to get it all assembled back together as a final fit. I still need to clean up the TPS case plastic and electrodes.

As I mentioned on a prior day, worst case scenario is the seals don’t work and I’m only out $20 or so.

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