Yanmar Cooler corrosion, is this normal?

[fuenstock]

Yesturday while changing zincs I noticed this corrosion on the yanmars intercooler at the hose to intercooler fiiting. I also noticed blistering of paint on the oil cooler at the welding of pipe nipple to cooler. When I scraped the blister I found corrosion under the paint, maybe a small pin hole in the weld? There is no visable water leaks and I'm unsure if this is normal or cause for worry. Luckly there is no pitting visiabe, just surface. Zincs have always been changed regularly and there is no visable sings of leaking water.

[chiefrcd]

I have some as well and I use this:

http://www.thefind.com/sports/browse-boeshield-t9-spray

I spray the heck out of everything.......

[fuenstock]

Thanks for the link.
I'll have to pick some up and give it a try..

[RicM]

Boeshield is great stuff, I spray it on all electrical connections before I shrink wrap also. It's available in the car section at Wal Mart and most hardware stores.

[OldDemps]

corrosion on the yanmars intercooler at the hose to intercooler fiiting.

Greetings Fuenstock,
1) what did you end up doing with cooler corrosion?

2) hows it now?

3) How long (months) do your engine zincs last in SF bay water?

Thanks