12/22/2024
Special type 3 updates for some performance type 3 engines completed, tested and final fitment on the true bolt on hub sand seal set up, does require mild drilling and tapping but makes it far more secure seal. (Sometimes with oil pressure sand seals can be pushed out)! See a post that posted recently that displays this problem.
This does several things for performance type 1 and 3 engines.
1) allows the sealing on the nose of the case for oil spilling prevention. Some might say it’s not needed but Porsche did long ago in 356 engine and was standard, vw later added them to type 4 engine standard.
2) it’s a larger quality double seal which allows for more surface area of the fan hub (more material) to allow for greater strength and stability, which prevents hub splitting.
3) easily replaceable seal
4) the hub is much narrower which does not require a slinger washer spacer, there is enough space between the pulley or type3 fan and hub.
The type 3 inner housing half does need to be a larger diameter to fit over the sand seal hub. This will now be a standard product on all our engine, in the future it will require removal of the counter sink bolt to split the case halves if it is needed. If it is no longer used, the holes can be plugged or welded.
Note: this seal will not fit with standard cut sand seal pulley sold on the market now, however we are looking for a replacement seal that can be used for such pulleys. Also, if you already have a machined in sand seal cut in the case, we plan e to make bushings that will fill in that gap so this bolt on hub can be used.
The his bolt on hub is a standard product sold by which we thank them for supplying it. Their sand seal pulleys are a larger hub diameter, but we plant to have an interchangeable seal for all pulley sizes on the market, so we can supply these to customers. We plan to supply both the drill bit and tap with the kit of choice. Call us for your needs, thanks!
If you’d like to do this upgrade on your type 1 or type 3 we can help to supply all necessary parts, welded fan!
