I'm replacing the 2" hoses between the Air Intake Distributor and Intake pipes (the spider body and legs on top of the engine). The old ones were swollen and cracking.
I removed the Air Intake Tubes and Air Box (described in Air Flow Meter). I loosened all 16 hose clamps, and slid the hoses on to the intake pipes. I disconnected the vacuum line and the 13 mm bolt on the front of the Intake Distributor and the vacuum line to the brake booster (on the drivers side). I then loosened the hose clamp between the Intake Distributor and Throttle body and pulled off the Intake Distributor. I put a clean shop rag into each end of the throttle body, just to stop foreign objects from falling in.
After removing the Intake Distributor I noticed a broken fitting on the vacuum check valve. I called DEVEK and waited for a part (058.131.851.A).
I then slid each hose over the gap between the intake distributor and intake pipe, placed the hose clamps in the appropriate places and tightened them. I reattached the front vacuum lines and made sure everything looked ok.
Next I reinstalled the airbox and air intake tubes (reverse order of removal).
I made sure I didn't leave any tools in the engine bay then I started the motor. It cranked over the first time and idled fine. I revved the engine a few time, got out and listened for vacuum leaks. I didn't hear any so I took the car out for a test drive. The car ran well, but I didn't have time to give it a good workout.
The whole job took about 3 hours (would be less if I knew what I was doing), and cost about $100 ($24 for the check valve). I don't know if it helps any, but the engine looks a little better, and hopefully will avoid any intake leaks in the future.
Copyright 2000, George A Suennen