1986 300 SDL Overheating - gasket, cylinder block, pump?? - Mercedes-Benz Forum

 
LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 09-08-2013, 02:11 PM Thread Starter
BenzWorld Newbie
 
Date registered: Sep 2013
Vehicle: 300 SDL
Location: Vermont
Posts: 1
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
1986 300 SDL Overheating - gasket, cylinder block, pump??

3 days ago I noticed on arriving home the engine temp at 110C. Checked and the coolant was low. Drove it again yesterday it heats up to 110 after about 10 minutes on flat grade. Both the rad and the reservoir get hot so it's not a stuck thermostat and maybe not water pump as fluid is circulating . Leaks about 2-3 quarts of fluid after 10 minutes drive. Coolant is visible in quantity in the pan under the engine. Can't see if its leaking from the water pump, but I notice the exhaust seems to now have a fair amount of white smoke. This worries me as I had total engine overhaul 2 years ago at high cost. The radiator is brand new Behr. I looked in the oil filler cap and there's no white gunk there, neither on the dipstick. Is it possible it's a blown head gasket or cracked cylinder head even if there's no sign of water getting in the oil? Are there different symptoms for blown head gasket vs cracked cylinder block?? Is replacing the head gasket an expensive job? What else could it be, assuming the white smoke indicates coolant burning off?
Another thing, the heater doesn't work at all now. I replaced the monovalve 5 years ago, but last year the heat became intermittent.
1986 300SDL 166K miles
dynamorph is offline  
Sponsored Links
Advertisement
 
post #2 of 2 (permalink) Old 09-09-2013, 11:33 AM
BenzWorld Elite
 
flyboyike's Avatar
 
Date registered: May 2003
Vehicle: 2012 Focus SE
Location: Ormond Beach, FL
Posts: 7,699
Mentioned: 1 Post(s)
Quoted: 68 Post(s)
Quote:
Originally Posted by dynamorph View Post
Another thing, the heater doesn't work at all now. I replaced the monovalve 5 years ago, but last year the heat became intermittent.
1986 300SDL 166K miles
So, let's see, you're losing coolant, and you have no heat. I'm not terribly smart, but I don't suppose you have a leaky heater hose, do you?

Felicita e un bicchiere di vino con un panino.
flyboyike is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > General Mercedes-Benz Forums > General Mercedes-Benz

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











  • Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
     
    Thread Tools
    Show Printable Version Show Printable Version
    Email this Page Email this Page
    Display Modes
    Linear Mode Linear Mode



    Posting Rules  
    You may post new threads
    You may 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 Off
    Trackbacks are On
    Pingbacks are On
    Refbacks are On

     

    Title goes here

    close
    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome