Originally Posted by Jes
I have tried to remove the heat exchanger on our Volvo
D2-55 for a cleaning service
Since the end cap is closely mounted to the flywheel, there is no space to use tools (and to remove the bolts of the end cap).
So the heat exchanger can only be reached via one side: the front cap, and it cannot be removed.
It seems to be that the complete heat exchanger house needs to be dismounted, but that's a lot of work
for a "two-yearly interval" inspection
(as suggested by Volvo).
Anyone with a better experience (or suggestion?
(iI assume that D2-40 models have simular problems)
I recently had to replace my D2-55 heat exchanger because of corrosion
on the exhaust
port. Once I had it off, I tried to remove the port on the inlet side. I found the bolts to be very difficult to remove, one I had to drill out. Based on that experience, I think it might be easier to remove the heat exchanger and clean it off the boat
. You will need a new gasket
and a torque wrench, but it will be much easier to work on. Be sure to take a good look at the exhaust elbow
for build up and also the exhaust port for corrosion
. Here is what mine looked like after 2000 hrs. This apparently is a pretty common problem when the elbow
gets build-up. I switched to a stainless elbow.