Diesel Discussions Only diesel topics should be posted here.

rattlesnakes under the hood

  #1  
Old 05-31-2017, 03:52 PM
Member
Thread Starter
Join Date: Jul 2011
Posts: 32
Default rattlesnakes under the hood

Not literally, it just sort of sounds like it. It sounds like "diesel knock" ( bucket with a handful gravel in it) and occurs while accelerating and stops when you get over 40 mph or so . When you're cruising on the freeway at 60 mph or so ( which is about right in a 240D) it's quiet. Generally it goes quiet under full load with your foot to the floor. Thanks for any advice anyone may have. I just today got an '84 300SD so I'll be asking more questions about that.
 
  #2  
Old 06-21-2017, 12:28 PM
Member
Thread Starter
Join Date: Jul 2011
Posts: 32
Default rattlesnake update

Shortly after I posted, the noise went away. I have no idea why. I went to the auto parts store and got some magic diesel elixir ( the one in the grey bottle). I poured it into the tank in the store parking lot. When I drove away the noise went away. Cause and effect? I don't see how it could have worked that fast. There wasn't time for the stuff to mix with the fuel. The only other factor I can think of is that it was a rainy day. In gas engines water mist injection can stop pinging. Pretty far fetched it seems but otherwise a strange coincidence. This same noise has come and gone several times over the last couple years so I guess I can just hope it doesn't come back. I've tried to describe this phenomenon as accurately as possible. Anyone have any further theories?
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
nguyenduc09
Mercedes SLK Class
1
06-16-2007 02:11 AM
roaster
Mercedes E Class
0
12-01-2006 03:37 PM
danpayton
Diesel Discussions
1
07-19-2006 12:53 PM
avan789
General Tech
3
04-30-2006 12:26 AM
sdanville
Mercedes M Class
0
09-02-2004 01:18 PM


Thread Tools
Search this Thread
Quick Reply: rattlesnakes under the hood


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.