Well, you guys were right - the stumbling problems seems to be a blocked heat riser tube. After running the engine to full operating temps, the tube is just barely warm (I have been told it should be hot enough to burn your finger on touch). Does anyone have any advice or experiences in cleaning/reaming this sucker out? I would prefer not having to drop the engine, as the car has an auto-stick with lots of ATF & associated connections. I have removed the muffler ,and am working the heat riser tubes from under the car. I have used cables on a drill, carb cleaner, penetrating fluid, and have even considered easy-off oven cleaner. The problem is that the tube is blocked in the middle (a.k.a. The "D" section). The first 14 inches, or so, coming in from either side is open. Trying to get that spray chemical up and into the center is difficult. Compressed air shot into one side does not exit the other. I'm getting no-where, quick. Does anyone know the inside dimensions of the "D" section? Would a cable coming in from the one of the riser tube ends possible hang-up on the area where the round tube changes to the "D' tube, or is that junction smooth? I have read some of the ideas for cable reaming on different VW websites. I was hoping that someone in this forum could shed some light, experiences, ideas on conquering this problem. Thanks, Rich
- posted
20 years ago