engine noise from 60 to 70 mph.. then quiet again
 

The noise is comparable to a propeller airplane or when semis use the air brake. It's a 82 300sd I bought 4 weeks ago, 205 000 miles. Drove it from Dallas to St. Louis, MO and then to Pensacola and back. Any suggestions?
TKS
Kamil

Answer
 

Bad engine mounts = jacking under load = fan blade slapping the shroud..

Heat shield OM617 engine mount
http://www.peachparts.com/shopforum/diesel-discussion/121452-heat-shield-om617-engine-mount-post873875.html

OM617 Motor Mount DIY
http://www.peachparts.com/shopforum/diesel-discussion/152804-om617-motor-mount-diy.html

Bad engine mounts
http://www.peachparts.com/shopforum/diesel-discussion/121286-bad-engine-mounts-post868339.html

Engine / motor mount DIY
http://www.peachparts.com/shopforum/diesel-discussion/146482-engine-motor-mount-diy-post1104023.html

300D engine mount blues
http://www.peachparts.com/shopforum/diesel-discussion/109264-300d-engine-mount-blues-post758340.html

One of the better reasons to change your motor mounts (pics)
http://www.peachparts.com/shopforum/diesel-discussion/102640-one-better-reasons-change-your-motor-mounts-pics.html








Have a great day.

Thank you for the suggestion, on to the motor mounts. What shroud?
Kamil

Answer
 

Picture attached.

And here I was thinking this would be a complicated one to figure out.
:cool: