I think he may have been referring to running with no air filter rather than the intercooler which lies after the turbo in the induction system.

In any case, it's a very bad idea to run any engine (except a boat ), particularly a diesel engine without an air filter.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250