I have the SDL out and ready to enjoy the nice weather again. Upon returning from her first good journey of the season, I've noticed a few problems.

1. Pretty good oil leak at the top (turbo) end of the turbo drain.

2. Front cooling fan turns on immediately with the ignition, even with the HVAC turned off.

3. Slight shudder in the driveline when accelerating moderately from a stop. This is accompanied by a "squeak, squeak, squeak" when letting off the accelerator at low speeds. The squeak noise goes away after a few miles of driving, but the shudder is still there.

Problem #1...should I just order the seal for the drain tube and hope for the best?

Problem #2...Noted a problem last cold season where the heat worked much better if in defrost mode. Replaced the monovalve, same scenario. Heat works fine through all modes with monovalve disconnected. Any ideas? I don't even know if the 2 issues are related

Problem #3...Flex disks are relatively fresh and the axle boots look good with no cracks. I was thinking of replacing the center driveshaft bushing. Good place to start???

Thanks!

__________________
Lance Allison
Lance@LanceAllison.com

Current:
11 MB S550 4Matic, 55k miles, Designo Black/Black
14 Ford F150 XLT Lariat Crew, 73k miles, 5.0
Coyote V8 4x4. Black/tan.
09 GMC Envoy Denali, 5.3 V8, 4x4 SWB. 38k miles,
Jewel Red/Med Gray.

Gone:
87 MB 300SDL, 320k miles, Astral Silver/Blue.
98 VW Jetta TDI, 488k miles, Classic Green/Gray.
85 Olds 98 Brougham FWD, 4.3 DIESEL V6, 80k
miles, 3x Gray.

MBCA Member, Chicago Region

The '86 has this as well. There's a slight shudder that is noticeable on heavier loads.......especially around 1900-2300 rpm. I remains at higher rpm's but is barely noticeable.

Replaced both flex discs, center bearing, center bearing carrier.........problem remains identically the same.

So, yes, it's a good place to start.........but, there are no guarantees.