bshanafelt
Senior Member
- Joined
- Oct 6, 2007
- Messages
- 427
- Vessel Name
- Isobel K
- Vessel Make
- 37' Custom Pilothouse
I am in the process of doing the 2000 hr maint. on the motor and gear. My 5.9 is rated for 210hp, it has a turbo and is mated to a Hurth (ZF) model 63 gear.
If you have this gear or one that uses an oil cooler without a zinc, you will want to read on.
One of the tasks is to inspect the oil cooler for the tranny. As I was also replacing raw water hoses, this was a pretty easy matter of getting to the unit and removing it for inspection.
One odd thing I had noticed, but never worried too much about was the lack of a zinc for this cooler.
It is about 15" long and 2" in diameter. It also has a drain plug. I have never drained it.
I noticed some green mush around the plug and went to remove it when instead it popped(snapped) off.
So, I did a bit of internet snooping and found to my horror that this is a throw-away part - one is lucky to get 6 years out of it before needing to replace. Of course, a catastrophic failure would mean pumping raw water through your tranny - very un-cool.
My motor & gear is 14 years old - I think I got my $$ worth out of the stock cooler.
New cooler in cupro-nickel from Fisheries is $109 - Gonna get a spare and plan to change it out at the 5 year mark. Sure wish there was a way to hang a zinc on it.
So, if you have one of these NON-zinced coolers, watch it.
If you have this gear or one that uses an oil cooler without a zinc, you will want to read on.
One of the tasks is to inspect the oil cooler for the tranny. As I was also replacing raw water hoses, this was a pretty easy matter of getting to the unit and removing it for inspection.
One odd thing I had noticed, but never worried too much about was the lack of a zinc for this cooler.
It is about 15" long and 2" in diameter. It also has a drain plug. I have never drained it.
I noticed some green mush around the plug and went to remove it when instead it popped(snapped) off.
So, I did a bit of internet snooping and found to my horror that this is a throw-away part - one is lucky to get 6 years out of it before needing to replace. Of course, a catastrophic failure would mean pumping raw water through your tranny - very un-cool.
My motor & gear is 14 years old - I think I got my $$ worth out of the stock cooler.
New cooler in cupro-nickel from Fisheries is $109 - Gonna get a spare and plan to change it out at the 5 year mark. Sure wish there was a way to hang a zinc on it.
So, if you have one of these NON-zinced coolers, watch it.