My engine is overheating at anything above 2,500rpm. I replaced both thermostats, which were faulty. No change, so I tried without thermostats. No change again. I used car radiator flush to try & clean out the fresh water system. The rubber impeller in the seawater system is ok. The seawater system is clear & pumping plenty water. When the engine is very hot, the seawater pipes are cold.
I think the heat exchanger requires cleaning. There is an end plate facing the front of the engine, which I removed & some crusty deposits came out. It is not possible to remove the element out the front, as there is no room. At the other end is a large rubber bellows with hose clips. Is it possible to get the element out that way? I don't think it has been removed since the boat was new (1989)
Or is there some stronger chemical solution I can soak the exchanger in, without trying to remove it?
I am wary of damaging the element if I try to remove it. It is probably corroded in place.
Any advice welcome.
I think the heat exchanger requires cleaning. There is an end plate facing the front of the engine, which I removed & some crusty deposits came out. It is not possible to remove the element out the front, as there is no room. At the other end is a large rubber bellows with hose clips. Is it possible to get the element out that way? I don't think it has been removed since the boat was new (1989)
Or is there some stronger chemical solution I can soak the exchanger in, without trying to remove it?
I am wary of damaging the element if I try to remove it. It is probably corroded in place.
Any advice welcome.