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Old 07-16-2006, 08:41 AM
jfikentscher's Avatar
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Join Date: Aug 2001
Location: Wall, New Jersey
Posts: 550
1987 300TD Turbo Replacement

I'm getting no power from the engine. Turbo does not seem to be spooling up. I have a replacement turbo. Any help appreciated in procedures to replace. Is this a straight forward unbolt off and bolt on?

I would like to get this done tomorrow if possible.



1987 300TD 440K - My car
2005 Jeep Grand Cherokee Laredo 107K - Tim's car
2000 - CLK320 100K - Deb's car
1994 C230 150K - Josh's Car
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Old 07-16-2006, 01:14 PM
Posts: n/a
Pretty easy to do. Nothing special is needed to swap it.

What steps have you taken to make sure it's the turbo? Does it spin freely? Is there any in/out or up/down shaft play? Lots of oil in the intake and/or exhaust?

Turbo's rarely fail. Most of the time it's related to fuel filters and broken/clogged air lines to the ALDA.
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Old 07-16-2006, 01:57 PM
dieseldiehard's Avatar
Join Date: Oct 2002
Location: Bay Area No Calif.
Posts: 4,320
First off check the short plastic line that runs from the intake manifold over to the alda switchover valve, if its plugged that's your problem!

The 603 turbo uses a flap in the exhaust that is activated by the wastegate, and they have been known to get crud that prevents them from closing completely so the result is low boost at take off. The symptom is the car finally seems to get up to normal power (or almost normal) after about 10 seconds or more because the turbo isn't spooling up properly. The remedy is to clean out the stuff around the flapper. You will see what I mean when you have the turbo out. I suggest using some liquid wrench or PBBlaster or Kroil on the studs, the nuts tend to freeze on the threads associated with the exhaust. Its not uncommon to break a stud (lower rear I think)

Another possibility is if you still have the trap oxidizer installed it can make the turbo seem to be inoperative, when in fact the Trap (the Nasty Trap Oxidizer!) is preventing exhaust gasses from passing thru. I certainly hope yours doesn't still have it on the engine.

Lastly, pull the crossover and see if its plugged. If its almost clogged then you need to remove the intake manifold also and clean out the gunk that tends to collect in them. And disable the egr to prevent this from happening.

'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!
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