What he said. When I bought the '83 300D both motor mounts were broken and the fan was hitting the shroud off and on.
Did you do anything besides change the oil? Oil level might be down if there is an internal engine problem. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > A bad motor mount can cause this kind of sound. It collapses to a > certain height and usually the exhaust will start banging on > something. The engine temp dependent and can tap at X rpm and > disappear at a higher rpm. > > Measure the height of the MMs. > > LarryT > > 91 300D > > > On 02/22/2017 9:04 PM, Kaleb C. Striplin via Mercedes wrote: > > So today I was driving along a 2 lane highway in the 97 and passed a truck. > > After I got past him all the sudden I got a loud hammering sound that > > sounded like a rod knocking or something. It seemed to happen at lower rpm > > and went away when it got up over about 2500 rpm or so. I did not have any > > low oil pressure lights or low oil as the oil was just changed and it only > > will use about a qt every 5k miles or more. I drove a few more miles and by > > the time I got to town t went away as mysteriously as it appeared. Wtf? > > Maybe a chunk or carbon broke loose or something? > > > > Sent from my iPhone > > > > _______________________________________ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > -- arche...@embarqmail.com <arche...@embarqmail.com> --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
