Author Topic: Cooling System Gaskets  (Read 1580 times)

McBenz

  • Associate Member
  • Junior Level
  • *
  • USA, TX, CELINA
  • Posts: 44
  • Both car and owner from Stuttgart
Cooling System Gaskets
« on: June 03, 2020, 22:40:01 »
Am currently replacing all my cooling hoses, thermostat, and water pump. I bought new gaskets for the thermostat housing and water pump, and was wondering if anyone had any recommendations or advice for using a light coat of high temp gasket sealant when putting it all together? Is using gaskets alone enough? Any pros or cons on this subject? Thanks,

Mark
1965 230 SL (Family Owned Since June 1965)
1974 Porsche 914 2.0L
2000 LX470 100 Series LandCruiser

ja17

  • Full Member
  • Platinum
  • ******
  • USA, OH, Blacklick
  • Posts: 7414
Re: Cooling System Gaskets
« Reply #1 on: June 04, 2020, 03:58:23 »
Not necessary on rubber o rings and hoses. You can actually get a "hose grease" which can help make things seal and will keep down corrosion of the aluminum parts under the hose. Gasket sealer on new paper gaskets is not needed but may help since old parting surfaces are no longer perfect. Old parts get nicked, and warped from use and age. A little sealer may be good insurance on paper gaskets. Use it sparingly since excess can  go to places where it can do harm.
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

Pawel66

  • Full Member
  • Platinum
  • ******
  • Poland, Mazowieckie, Konstancin-Jeziorna
  • Posts: 5495
Re: Cooling System Gaskets
« Reply #2 on: June 04, 2020, 05:32:38 »
This "hose grease" - is it a specific type of grease exactly for this application? Or certain type of grease you use for this purpose?
Pawel

280SL 1970 automatic 180G Silver
W128 220SE
W121 190SL
G-class

ja17

  • Full Member
  • Platinum
  • ******
  • USA, OH, Blacklick
  • Posts: 7414
Re: Cooling System Gaskets
« Reply #3 on: June 04, 2020, 13:55:59 »
I suspect it is a lubricant which will not degrade rubber hoses etc. (most likely a silicone base grease)
« Last Edit: June 04, 2020, 14:05:20 by ja17 »
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

Pawel66

  • Full Member
  • Platinum
  • ******
  • Poland, Mazowieckie, Konstancin-Jeziorna
  • Posts: 5495
Re: Cooling System Gaskets
« Reply #4 on: June 05, 2020, 07:33:50 »
Thank you!
Pawel

280SL 1970 automatic 180G Silver
W128 220SE
W121 190SL
G-class

McBenz

  • Associate Member
  • Junior Level
  • *
  • USA, TX, CELINA
  • Posts: 44
  • Both car and owner from Stuttgart
Re: Cooling System Gaskets
« Reply #5 on: June 06, 2020, 20:13:57 »
Great, thanks for the tip.
1965 230 SL (Family Owned Since June 1965)
1974 Porsche 914 2.0L
2000 LX470 100 Series LandCruiser