Interpretation ID: nht92-2.16

DATE: November 20, 1992

FROM: L. Schmidt

TO: NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 5-6-93 from John Womack to L. Schmidt (A41; Std. 301)

TEXT: I am writing to obtain some information regarding changing engines in cars -- the questions are.

1. Is there any law that forbids replacing a worn out gas engine in a U.S. or foreign automobile with a diesel engine -- like a 6 cylinder Diesel Cummins engine which is in a Dodge pickup truck? (the 3/4 ton type)

2. If there is a law that forbids that -- does it only apply to the zone in a state where emissions tests are yearly required?

Please let me know about this. I was told its possible there is a law on this.

I would assume that the GM Diesel engine passenger cars could have engines switched to other better diesel engines if there was a law against switching the other way.

Please let me know as we would like to know about this.