Cannot find metric bronze screws for my diesel water pump, so replaced
em with SS ones. Yanmar uses these awful Phillips screws on the water
pump covers that get messed up quickly and really dont hold tight
either. I have used SS allen ones.

On Oct 1, 8:32 pm, wrote:
On Wed, 1 Oct 2008 13:26:58 -0700 (PDT),
wrote:

Cannot find metric bronze screws for my diesel water pump, so replaced
em with SS ones. Yanmar uses these awful Phillips screws on the water
pump covers that get messed up quickly and really dont hold tight
either. I have used SS allen ones.

I suppose it all depends on the alloy of the stainless and the alloy
of the bronze but they use stainless scleras on bronze direct burial
ground clamps.

I looked on the Galvanic series and most SS is close to bronze.
However, Yanmar used what look like bronze screws instead of SS
although SS is prob cheaper. Weirdly, the face of the pump that gets
removed when changing the impeller is SS held by the bronze screws.

wrote in message
...
On Oct 1, 8:32 pm, wrote:
On Wed, 1 Oct 2008 13:26:58 -0700 (PDT),
wrote:

Cannot find metric bronze screws for my diesel water pump, so replaced
em with SS ones. Yanmar uses these awful Phillips screws on the water
pump covers that get messed up quickly and really dont hold tight
either. I have used SS allen ones.

I suppose it all depends on the alloy of the stainless and the alloy
of the bronze but they use stainless scleras on bronze direct burial
ground clamps.

I looked on the Galvanic series and most SS is close to bronze.
However, Yanmar used what look like bronze screws instead of SS
although SS is prob cheaper. Weirdly, the face of the pump that gets
removed when changing the impeller is SS held by the bronze screws.

I suspect they are more concerned about the galvanic corrosion between the
threads that between the pump face and the screw heads. You could put a
little thread sealer on them before putting them in. Might help a little.

"jamesgangnc" wrote in message
...
wrote in message
...
On Oct 1, 8:32 pm, wrote:
On Wed, 1 Oct 2008 13:26:58 -0700 (PDT),
wrote:

Cannot find metric bronze screws for my diesel water pump, so replaced
em with SS ones. Yanmar uses these awful Phillips screws on the water
pump covers that get messed up quickly and really dont hold tight
either. I have used SS allen ones.

I suppose it all depends on the alloy of the stainless and the alloy
of the bronze but they use stainless scleras on bronze direct burial
ground clamps.

I looked on the Galvanic series and most SS is close to bronze.
However, Yanmar used what look like bronze screws instead of SS
although SS is prob cheaper. Weirdly, the face of the pump that gets
removed when changing the impeller is SS held by the bronze screws.

I suspect they are more concerned about the galvanic corrosion between the
threads that between the pump face and the screw heads. You could put a
little thread sealer on them before putting them in. Might help a little.

There is a product called "TEFGEL" that is designed and works great for this
application. It keeps the o2 out of the fitting.

On Oct 2, 10:21*am, "mmc" wrote:
"jamesgangnc" wrote in message

...



wrote in message
....
On Oct 1, 8:32 pm, wrote:
On Wed, 1 Oct 2008 13:26:58 -0700 (PDT),
wrote:

Cannot find metric bronze screws for my diesel water pump, so replaced
em with SS ones. *Yanmar uses these awful Phillips screws on the water
pump covers that get messed up quickly and really dont hold tight
either. *I have used SS allen ones.

I suppose it all depends on the alloy of the stainless and the alloy
of the bronze but they use stainless scleras on bronze direct burial
ground clamps.

I looked on the Galvanic series and most SS is close to bronze.
However, Yanmar used what look like bronze screws instead of SS
although SS is prob cheaper. *Weirdly, the face of the pump that gets
removed when changing the impeller is SS held by the bronze screws.

I suspect they are more concerned about the galvanic corrosion between the
threads that between the pump face and the screw heads. *You could put a
little thread sealer on them before putting them in. *Might help a little.

There is a product called "TEFGEL" that is designed and works great for this
application. It keeps the o2 out of the fitting.- Hide quoted text -

- Show quoted text -

I use a teflon thread sealer from permatex. I use it on the exhaust
manifold threads as well. I'm guessing that the TEF part of your
product also stands for teflon? I suspect any of these will do in a
fairly stable location like this example. Sure can't hurt.

On Thu, 2 Oct 2008 08:24:20 -0700 (PDT), wrote:

I use a teflon thread sealer from permatex. I use it on the exhaust
manifold threads as well. I'm guessing that the TEF part of your
product also stands for teflon? I suspect any of these will do in a
fairly stable location like this example. Sure can't hurt.

I grease all the lugnuts at least once a year. The convenient tub of
baby grease[half vaseline half lanolin] is good. If I happen to still
have my pound tub of wheel bearing grease that would work, as will
chassis lube. You regrease them when you rotate the tires, relatively
often, in other words, so anything will do. The permatex is overkill
for that. Incidently, you can get one of the x shaped 4 sizes lug
wrenches for less than twenty bucks. With one of those, you know the
nuts are coming off. Those factory excuses on the other end of the
jack handle are senseless torment.

Casady

Gene Kearns wrote:
On Wed, 1 Oct 2008 13:26:58 -0700 (PDT),
penned the following well considered thoughts to the readers of
rec.boats:


Cannot find metric bronze screws for my diesel water pump, so replaced
em with SS ones. Yanmar uses these awful Phillips screws on the water
pump covers that get messed up quickly and really dont hold tight
either. I have used SS allen ones.


Not recommended.... dissimilar metal corrosion will be very
likely.....

Stainless on Stainless tends to gall so where you need frequent
adjustment, e.g. a backstay with a handwheel, there is often a bronze
nut running on a stainless male thread. It'll be fine with a little
grease on the threads.