|
|
|
|
|
|
|
#1
03-04-2023, 11:06 AM
|
|||
|
|||
|
unknown sound 1980 300D
trying to determine what is making a squeaking/scraping sound. starts making sound after a few minutes running when the motor warms slightly. I've used a stethoscope to check PS pump, alternator, water pump, and vacuum pump but have not been able to find a source of the noise. noise sounds like it may be coming from the rear of engine compartment back towards where the engine and transmission meet.
have audio/video, but a 10 sec clip exceeds the maximum uploadable size by about 10x 
|
|
#2
03-04-2023, 11:57 AM
|
||||
|
||||
|
Quote:
Sounds like you need to safely raise the car and get under there with your stethoscope. You can sometimes detect if a belt is causing the squeaking by pouring part of a glass of water on the belt. Do that from the front because the water is going to get flung to the sides.
__________________
84 300D, 82 Volvo 244Gl Diesel
|
|
#3
03-06-2023, 02:06 PM
|
|||
|
|||
|
yes it is automatic.
I have raised it and listened some underneath. that's how I came to the conclusion back of motor/front of transmission. And i also tried the water on the belt trick, that didn't fix it either.
|
|
#4
03-07-2023, 08:39 PM
|
||||
|
||||
|
Ive found it next to impossible to pinpoint many sounds.
Does the engine mount soften with heat?
__________________
Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (116k) 1991 350SD (206k) 1991 300D (228k) 2008 ML320 CDI (199k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (267k) Past Diesels: 1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)
|
|
#5
03-08-2023, 12:11 PM
|
|||
|
|||
|
don't know. the motor mounts were replaced just about a month ago. can't remember if I was hearing that noise before then or not.
|
|
#6
03-08-2023, 04:09 PM
|
||||
|
||||
|
Quote:
Does the engine have shocks? Are you sure you disconnected them before lifting to swap mounts? I’d suspect that a bad shock mount could squeak and be incredibly hard to find.
__________________
Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (116k) 1991 350SD (206k) 1991 300D (228k) 2008 ML320 CDI (199k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (267k) Past Diesels: 1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)
|
|
#7
03-09-2023, 11:21 AM
|
|||
|
|||
|
yes it has shocks. and I had to remove the nut and rubber cups to lift the motor.
something I forgot in the original post is that the sound directly corresponds to engine speed.
|
|
#8
03-09-2023, 11:22 AM
|
|||
|
|||
|
Its a daily driver so when I get the chance I intend to remove the belts one at a time and see if I can isolate a source. and can someone describe what injector ping/knock sounds like? Don't think its an injector but I don't know enough about them to know what it sounds like
|
|
#9
08-18-2023, 02:14 PM
|
|||
|
|||
|
I never did figure out out what was squeaking, after a few months it just disappeared so I'm no longer worrying about it.
__________________
1980 N/A 300D with 240d ACC and sanden unit, 281k miles, has a 617.951 turbo motor installed and a 4 speed standard in its future.
|
|
#10
08-22-2023, 09:29 AM
|
||||
|
||||
|
Quote:
__________________
Theseus Instragram: doss_project 1984 300SD - 930 Blue, OM 617 Murfreesboro, TN Theseus owned a ship in Greek mythology, and when a part of the ship needed replacing, it was replaced. Eventually, everything was replaced. Is it the same ship? (I own the car of Theseus.  )
|
 |
| Bookmarks |
|
|
Hybrid Mode
