UrS4 Frequently Asked Questions

If you decide to change your wastegate (WG) spring, then you need to remove the wastegate cap. Before you do so, you might want to experiment with turning the stock spring in a bit first. If your WG cap is “virgin” and still has its quarter-sized cap over the adjusting screw, you will need to remove the little cap.

To do this, you need to drill a small hole in the center of that little cover plate center cap. DO NOT USE YOUR NEW (German Name Brand) DRILL WITH 1/2″ BIT (Don’t ask). Use a 1/8″ bit in a 3/8″ drill instead. Once you have the hole, insert a suitable screw and then pull/pry out the little cap using the screw for purchase. Protect the top of the wastegate so you don’t scratch it. (Don’t ask).

Then you will need to pick out the epoxy at the top of the adjusting screw that was put there to prevent you from messing with the screw. Once you have the epoxy out, then you can experiment with turning in the stock spring (max 6 turns in from stock).

If you still want to remove the wastegate cap and install the 1.9 bar spring, then remove the six small nuts on the top of the wastegate. I worked my way around leaving all the nuts just at the top of the threaded studs. Then I put my hand on the top of the wastegate cap and pushed down while I removed all the nuts and placed them in a safe place.

If the cap does not spring up by itself, then put two nuts back on to oppositve studs and find a very thin bladed small screw driver or a wood chishel. With one hand on the top of the wastegate cap, insert the screw driver or chisel blade under the edge of the wastegate cap and gently pry. Move the blade to another section and pry again. The cap should spring up under your hand. Remove those two nuts you added back and then remove the wastegate cap.

Time for polishing or painting or powder-coating (if you want).

IF you are installing the 1.9 bar spring, I strongly suggest that you run the perch screw in the center of the cap all the way to the top.

Installation is the reverse of removal. You need to push harder to get the cap down over the studs before hand starting the six nuts. Run the nuts down as far as possible by hand while pushing on the WG cap. Then use your wrench to tighten the nuts. Use the cross tightening procedure like it was a truck road wheel.

Don’t over tighten (= snap!)