1/2 VW gaskets


Help Support HomeBuiltAirplanes.com:


Well-Known Member
Lifetime Supporter
Log Member
Aug 27, 2014
Louisville, KY
I got my balanced crank back from Scott Cassler, and am planning on putting the engine back together soon. I need new gaskets to do so, but I'm kind of at a loss as to what I need.

What gaskets do I need to put it back together? Is there a special 1/2 head gasket? Anything else special? Where should I buy them from?

I have a Global 1/2 VW, if that makes a difference. I took it apart at my friend's hangar about 4 months ago, and haven't been able to go look at what gaskets were on it.

Hot Wings

Grumpy Cynic
HBA Supporter
Log Member
Nov 14, 2009
Rocky Mountains
No head gaskets on a VW - at least you shouldn't use them. Dito cylinder base gaskets. Both go in the trash.
Pushrod tube seals (8)
Generator stand seal. Maybe 2 if you are using a crankcase breather there.
O-rings for the main case studs (4)
Oil pump and cover gaskets
O-ring for the distributor drive hole (depends on what kind of ignition you are using)
Fuel pump gasket(s) (one if using a block off, 2 if you are using a mechanical pump)
Gasket for the "universal" case dipstick tube hole - if you are using that kind of case. It's the hole to the right of the oil pump looking at the pulley end.
............It's probably easiest to just buy a full gasket set for a VW rebuild. Some come with junk pushrod tube seals. Can't advise regarding these without ............hands/eyes on inspection. :(

Case halves = Ultra Gray silicone (small amount), Gasguscinch, or anaerobic sealant.
Cylinder base seal = same as above
Head seal = lapped with cylinder. Make sure you remove ALL of the lapping compound.
........If there is a ridge on the head that you can feel with your fingernail it's time for a head cut. Then maybe shims under the cylinders (not gaskets)

Edit: Forgot oil cooler seals. Depending on the case and cooler/adapter you may need a pair of about 4 different options. There is a seal that adapts the different size reliefs if you have a mismatch. These too, like the push rod tube seals, have spotty quality control and material selection.

The rest is all dependent on your particular conversion such as seal for the magneto.
Last edited: