jeff spahn

I saw the thread that you can do a VW hatch motor modification in the 928 but I can't seem to find any detailed instructions on how to do the actual swap.

Does anyone have information on how to make this motor work in the shark?

Thanks

Ducman82

PM colin

txhokie4life

I'd like to see the info as well.

thanks,

m

Lizard928

I have yet to do up a write up on how to do it. But it is pretty straight forward.
I've responded with some instructions to your pm.

z driver 88t

Jeff, please post some pics if you do it. I had also searched on this mod and found some basic info but no real instructions. Looking at the actual VW part online it is not inherently obvious what get's swapped. I presume the rotating arm from the porsche motor must swap onto the VW motor, but I'm sure there is more to it.

Although my motor is working right now, I have had to do some minor surgery on it in past. It would be nice to have a modern alternative.

jeff spahn

So I spent the better part of 5 hours working on the VW hatch motor mod on my car. I learned the following things:

Our cars require the arm to be pulled down to release the hatch. The VW motor (edit: some tool on eBay sent me the wrong part. The Golf part operates correctly. The Jetta part is reverse) operates upwards when current is applied. This directly opposite from what you need it to do.

This is not going to be a simple plug and play operation though when done it will be very nice as the motor will only actuate when you pull up on the hatch release rather than cycle and burn out a fuse.

I am working with a very accomplished engineer (as in head engineer for the entire Forestry division of John Deere) to get this hatch release motor to work.

Today we fabricated a bracket to mount the VW motor to the car, cut away any interfering metal in the hatch area since the VW motor is very tall (even with the actuating arm shortened)

We also wired up a nice Deutch connector for the wiring and ran some nice professional cabling for the motor.

Most of the time was taken up taking measurements, making sure there wouldn't be significant side loads on anything, cutting and welding brackets so it looks like it belongs, etc.

Later this week, after the ball and socket joints come from McMaster Carr we will fabricate a lever arm to reverse the direction of the motion of the VW hatch motor so when it goes up, it will pull the Porsche hatch lever down.
We thought about using RC helicopter servo arms made of carbon fiber or high strength nylon for this but figured an aluminum one with a bushing and custom fabricated bracket that makes the motor a one piece, plug and play affair be the right answer so if the motor ever goes bad you can just swap the motor and replace it. Well we won't need to do this now since finding out some tool shipped me a Jetta motor and not a Golf motor)

We looked at horizontal mounts with L shaped lever arms to change directions but decided against that (for now).

I tried to get pictures from those who have done this before but wasn't successful. When this venture is all done I will post extensive pictures of the motor, how it mounts, how it interacts with the Porsche part and what measurements we used to make everything work so others can replicate what we have done and not spend 30 hours coming up with a solution that doesn't involve a rotary actuator.

I did also find that even when manually moving the arm I am going to still have to put zip ties on the pot metal cam on the hatch receiver. Even with a newly rebuilt upper hatch latch it won't release without the extra thickness the zip ties give. Again I will take lots of pictures and post them up.

Do I have plans to make a kit? Not a chance but I'll let you learn from my pain.

Lizard928

You bought a motor from a Jetta,
the golf pulls down when you engage it.
The jetta pushes........

Also if you need the zap straps that means that the tongue in the lock mechanism is worn which costs about $14 in parts to replace........

jeff spahn

Ah..... Do you have the golf part number? I would hate to engineer the crap out of something that doesn't need it. I took the part number from a post here.

I did replace the parts in the lock mechanism and still need the zip ties. What is going wrong?

jeff spahn

So it turns out I got shipped the wrong part by the tool I purchased this from on eBay.

The part number needed is:

3A0 959 781 he shipped me a different part and I didn't know better until just now when Colin pointed out I am an idiot. (Thanks Colin)

I'll scrap the lever arm actuator and install the way Colin talks about. Then I'll post up pictures of the finished project.

God I love Rennlist!

Next project is modifying the headlights so you can easily adjust the top of travel. I have to modify this due to the supercharger install and the inlet snorkel.

Alan

If you flip the motor upside down and create a "U" shaped yoke around the body - you can easily make it pull down. In this case you'd remove the extension arm completely. You just need a mount frame with some standoffs to allow space around the body for the yoke movement.

I think you are making it much to hard with the levers etc... Stay simple!

Alan

jeff spahn

Alan. I am now staying simple. Ordered another motor that is from a Golf (though the last one I ordered was "from a Golf" also).
If I get another motor of the same type I can try your idea.

Alan

!! well that works too... maybe you can sell the Jetta one to someone is Australia (it will almost be the right way up).

Alan

Walt L

Working like a charm!! Thanks Colin!!