Heat Exchanger/New Water Pump

[mmdesmith]

I am still getting some smoke/steam out of my exhaust after replacing the impeller over the winter and am afraid the two fins that broke off the old impeller are in the heat exchanger and restricting flow/cooling. Not sure if the water flow out of the exhaust is good since I may have never seen what normal looks like. Anybody pulled the heat exchanger apart or have any advice?

I also noticed that, in 2004, Westerbeke replaced the raw water pump on the 30B. Should I just replace the raw water pump to avoid future problems (asumming they did it for a reason)?

 

[mmdesmith]

I am still getting some smoke/steam out of my exhaust after replacing the impeller over the winter and am afraid the two fins that broke off the old impeller are in the heat exchanger and restricting flow/cooling. Not sure if the water flow out of the exhaust is good since I may have never seen what normal looks like. Anybody pulled the heat exchanger apart or have any advice?

I also noticed that, in 2004, Westerbeke replaced the raw water pump on the 30B. Should I just replace the raw water pump to avoid future problems (asumming they did it for a reason)?

Bumping this for any thoughts/input.

 

[dugsmith98]

Not very hard to do. Simply pull the end cap and you should find the pieces. You should also replace the gaskets for the caps at the same time.
You will want to pull the other end as well, since it probably has zinc debris there from the pencil zinc at that end.

 

[mmdesmith]

Not very hard to do. Simply pull the end cap and you should find the pieces. You should also replace the gaskets for the caps at the same time.
You will want to pull the other end as well, since it probably has zinc debris there from the pencil zinc at that end.

Thanks I did that today and see the picture for results. I am assuming the other fin broke up because it wasn't in the exchanger or the hose between the pump and exchanger. The other item is a small stone. Might have been a sinker at one point but appeared to be pretty smooth from years of rattling around in the exchanger! The dime is just for size and was not actually in the exchanger. Got everything replaced and ran engine for close to 1/2 an hour with no smoke. Hopefully that got it. Thanks again!

 

[Philip_Oceanis 361]

If you have an air vent (especially the one with the valve) between the pump and the exchange heater check it out too. Simply remove it, open the valve and wash with some warm fresh water.

 

[Benjamin Disralei]

Well your at it, it would be well worth checking your mixing elbow at the back of the manifold, worked on a yacht that had similar problem with emitting steam then the exhaust box caught fire, make sure the mixing elbow has not developed artery hardening and has plenty of throat.

Recently I took the time to check out the water discharge from similar motors, we measured the water out put at different rev ranges, the results were interesting, in fact the yacht that I mentioned had the mixing elbow issue, once replaced had the same water output as the other motor through several rev ranges. We also checked out the water discharge heat along with the manifold heat through these rev ranges after specific time intervals with a heat reading gun and you could have thrown a blanket over the results. Just something to consider.

 

[Stu Jackson]

That's not a stone, it's a piece of the old zinc.

Instead of just looking in the ends of the HX whenever I suspect anything wrong, I take the whole thing off. In many cases one of the inlet ports gets fouled with salt precipitation, which you wouldn't know about unless you removed the HX.

Good luck.

 

[mmdesmith]

That's not a stone, it's a piece of the old zinc.

Instead of just looking in the ends of the HX whenever I suspect anything wrong, I take the whole thing off. In many cases one of the inlet ports gets fouled with salt precipitation, which you wouldn't know about unless you removed the HX.

Good luck.

Have not replaced the zinc yet - that makes since - it's a freshwater boat so hopefully there will not be a lot of salt deposits.

I wish I had the admirals panel which has a temp gauge vs. the warning light. I would hope I could swap out the panels fairly easily (i.e. all the wiring is there).