« previous next »
Pages: [1]

Author Topic: 66 230sl overheating  (Read 3630 times)

jrrx

  • Guest
66 230sl overheating
« on: July 14, 2008, 12:56:51 »
Hi all,

I have a 66 230sl which starting to overheat only when driving on the freeway. It is fine around town and idling, I have replaced the radiator and thermostat checked the timing and air gas mixture. I am running out of options. Thought about water pump but  don't have anyother  ideas. Thanks Jim
Logged

Richard Madison

  • Associate Member
  • Platinum
  • ******
  • USA, NY, New York
  • Posts: 1181
Re: 66 230sl overheating
« Reply #1 on: July 14, 2008, 13:47:16 »
Jim:
Use the forum Search (top of every page) for "overheating"
and see if we have anything in the Technical Manual by doing a search there. Find the Tech Manual on the website home page.

Richard M, NYC
Logged
1969 280 SL, Tunis Beige, Euro Model (Italy).

waqas

  • Full Member
  • Platinum
  • ******
  • USA, TX, Austin
  • Posts: 1738
Re: 66 230sl overheating
« Reply #2 on: July 14, 2008, 14:28:33 »
Overheating under load points to incorrect operation of the distributor. Have you checked your vacuum lines?

Logged
Waqas (Wa-kaas) in Austin, Texas

ja17

  • Full Member
  • Platinum
  • ******
  • USA, OH, Blacklick
  • Posts: 7414
Re: 66 230sl overheating
« Reply #3 on: July 14, 2008, 21:37:37 »
Hello Jim,

You replaced the radiator with what?  Also Try turning the heater on full blast on your next freeway trip and let us know if this helps.  

Make sure the correct thermostat has been used. The originals are dual acting. As they open one coolant passage another passage is closed.
Logged
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback
Pages: [1]
« previous next »