Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #31  
Old 06-05-2005, 07:38 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 38,940
noise

if you didnt have the noise before you did the things i think i heard yoiu say you did, it sounds to me as if nothing you have done would cause any mechanical damage... so worrying along those lines i think is unproductive.

did you do anything with the injectors? i had lots of horrible sounding noises with my 350 that turned out to be first missing seals at the base of the injectors and then loose injectors.

i have not experienced any noise with the hydraulic tappit adjusters on my diesel but on my 500sec i have one that makes noise with fresh oil if it is 15w40. if i use mobil one it makes no noise. this is a tapping that is annoying but not scarily loud.

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #32  
Old 06-06-2005, 11:15 AM
swogee's Avatar
Registered User
 
Join Date: Apr 2004
Location: San Luis Obispo, CA
Posts: 202
I did not touch the fuel injectors or lines. Before I changed the fuel filter the tapping sound was not as loud, but I think revving the engine while I was trying to get the engine to start may have hastened the demise of the bad lifter(s). The noise was always there, just not as loud. The noise seems to be more metallic in nature, and it is the loudest around cylinder 2 at the valve cover.

I typically don't like driving a vehicle when something doesn't sound right.

-Steve
__________________
1987 300TDT smoke silver w/ burgundy leather interior
2000 VW Passat wagon indigo blue w/ beige leather interior
1985 Mustang SVO
1970 Chevrolet K10 fleetside, shortbed
Reply With Quote
  #33  
Old 07-19-2005, 02:35 PM
swogee's Avatar
Registered User
 
Join Date: Apr 2004
Location: San Luis Obispo, CA
Posts: 202
Update:

I decided to let the my 1987 300TDT (w/ OM603.960 engine) sit for a few days, and then I drove it around for a few miles at freeway speeds. The loud tapping noise went away so I guess that noise must have been air in the injectors which occurred after I replaced the large fuel filter? Would air in the injector lines cause a loud tapping?

After the loud tapping noise went away, there was still a faint tapping noise audible at idle even after the engine warmed up. I already had ordered the lifters, so I went ahead and replaced all 12 lifters and the faint tapping noise is still there. Before I replaced the lifters, I didn't find any squishy ones, but since the engine has 185K on it I went ahead and replaced the lifters. I guess I'm all out of ideas now on what could be causing the noise. It's not really loud, but it is noticeable. I am assuming that normally there is just the diesel knocking sound when the engine runs, and no tapping.

Do the injectors make any sort of faint tapping/ticking during normal operation?

Thanks,

-Steve
__________________
1987 300TDT smoke silver w/ burgundy leather interior
2000 VW Passat wagon indigo blue w/ beige leather interior
1985 Mustang SVO
1970 Chevrolet K10 fleetside, shortbed
Reply With Quote
  #34  
Old 07-26-2005, 07:27 PM
dieseldiehard's Avatar
Dieseldiehard
 
Join Date: Oct 2002
Location: Bay Area No Calif.
Posts: 4,418
Injectors themselves shouldn't make any noticeable clicking noises, but the IP can, in one of my 617's it has a tiny click but I never noticed that sound on my 603 engine (even without the hood insulation).
Using a listening device like this might help:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1,1&item=4563669349&sspagename=STRK%3AMEWA%3AIT

PS I just ordered a set of lifters for my '87 (not the daily driver, another project car) with 260K miles on them, I'd be gambling if not replacing them while the head is apart.
__________________
'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!
Reply With Quote
  #35  
Old 07-26-2005, 07:32 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 38,940
yeah

it may be a normal sound. i think that the vac pump makes a sound or perhaps the ac comp. after having a scare we all tend to listen more intently. perhaps this is what you are doing.

tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #36  
Old 05-20-2010, 01:35 PM
Renntag's Avatar
User Especial
 
Join Date: Jul 2008
Location: Kona, Hi
Posts: 1,408
Quote:
Originally Posted by sixto View Post
.... Crack the the lines into the injectors while you crank.
i know this sounds confusing....but I imagine you are suggesting that the fitting where the line attaches to the injector be loosened allowing air to escape.
I must ask though, how many of you guys do this alone? Do you have a remote starter button and if so, where do you feel is best to connect?



Quote:
Originally Posted by sixto View Post
....I was tempted to bypass the fuel thermostat when it sprung a leak. In my case either the plastic end piece cum fitting or the o-ring cracked when I replaced all the fuel lines...
Fuel T-stat? What does it look like? Does anyone remove this?
And what is a Cum Fitting?



I am diagnosing a 'no start' condition with an 87 300TD. Ran fine, parked on the flat, week later, no start. I get a 'pop' maybe from one cylinder trying, but thats it. Was hoping to see priming procedure here. No luck yet. Will try opening lines while helper cranks.

Battery is fully charged.
__________________
85 300D 3 pedal. Current project.
83 300TD (need rear wiper assembly dead or alive)
84 300SD Daily driver
85 300TD almost 400k miles and driven daily.
98 E300D *sold
86 300SDL *sold and made flawless 10 hour journey to new home.
Reply With Quote
  #37  
Old 05-20-2010, 02:26 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 27,018
there is a junction block right in front of the battery, follow the positive cable, it connects to it.
jump the positive cable with the wire next to it, and you will get a crank.
if you have a remote starter switch, connect it there, (like 7.00 at autozoo)
Reply With Quote
  #38  
Old 05-20-2010, 10:08 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: Eastern TN
Posts: 20,851
Quote:
Originally Posted by Renntag View Post
i know this sounds confusing....but I imagine you are suggesting that the fitting where the line attaches to the injector be loosened allowing air to escape.
I must ask though, how many of you guys do this alone? Do you have a remote starter button and if so, where do you feel is best to connect?
I do it alone. No remote starter. Loosen all the lines, crank for 10 seconds, tighten the fittings that are wet, lather, rinse, repeat. When at least 4 lines are wet and tight, the engine will stay running on its own.

Quote:
Originally Posted by Renntag View Post
Fuel T-stat? What does it look like? Does anyone remove this?
And what is a Cum Fitting?
It's an aluminum cylinder sitting on the driver side engine mount arms. Follow the fuel line from the small filter to the plastic end piece of the thermostat that's also the fuel inlet fitting for the fuel thermostat.

Quote:
Originally Posted by Renntag View Post
I am diagnosing a 'no start' condition with an 87 300TD. Ran fine, parked on the flat, week later, no start. I get a 'pop' maybe from one cylinder trying, but thats it. Was hoping to see priming procedure here. No luck yet. Will try opening lines while helper cranks.
Other no start suspects include stuck IP fuel return check valve and clogged oxidation catalyst. To check the fuel return check valve, pinch the line from the big fuel filter back to the tank. If the engine starts, the check valve is stuck open. To check for a clogged cat, remove the plug on the #1 exhaust runner that takes a 17mm socket. If the engine starts, the cat is probably clogged.

Sixto
87 300D

Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 05:25 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page