Author Topic: Corrosion on hose necks  (Read 2943 times)

wwheeler

  • Vendor
  • Platinum
  • ******
  • USA, TX, Dallas
  • Posts: 2898
Corrosion on hose necks
« on: June 21, 2011, 20:01:21 »
I am doing extensive work on the front of my engine, specifically the water pump, thermostat and housings etc. I noticed on the outside of the necks of the aluminum components, there is corrosion. On the inside of the components, there is generally no corrosion. The neck corrosion is not on the pressure side (fluid) of the clamp but rather on the air side (no pressure) of the clamp.   

I use Zerex G05 coolant but don't know what was used previously. Why is there corrosion where there is no fluid?

Is there a compound that can be used to prevent this?
Wallace
Texas
'68 280SE W111 coupe
'60 220SE W128 coupe
'70 Plymouth Roadrunner 440+6

114015

  • Full Member
  • Platinum
  • ******
  • Germany, Nordrhein-Westfalen, Tecklenburg
  • Posts: 2080
Re: Corrosion on hose necks
« Reply #1 on: June 21, 2011, 20:21:06 »


It's a common observation, Wallace.
 :-[
Not only your car has that. You can basically find that effect on all older MB engines. Consider they are ++40 years old.

Dont' know exactly for the reason .... ???


Achim
(also with aluminum corrosion on his 3 engines)
Achim
(Germany)

49er

  • Full Member
  • Platinum
  • ******
  • USA, CA, El Dorado Hills
  • Posts: 1426
Re: Corrosion on hose necks
« Reply #2 on: June 21, 2011, 20:41:17 »
Same on mine. I just use a little WD40 on a rag to wipe it down once in a while.

John
1969 280SL 003820
Un Restored, All Original, including the paint
Original Owner, Purchased September 18, 1968
4 speed manual, PS. 77217 miles
7280 miles since awoken from her 20+ yr "nap" in 2010