Oil Gypsy
Veteran Member
- Joined
- Sep 25, 2019
- Messages
- 53
- Location
- Canada
- Vessel Name
- Dauntless
- Vessel Make
- Grand Banks 36 Classic #248
Hello,
I have a GB 36 with twin Lehman 120's, we've been suffering from high(ish) running temps. After doing all the usual things, coolers, strainers, hoses etc I removed the exhaust elbows from one of the engines, its a two part system made up of a Barr 90 degree elbow and another 90 degree swivel section, there is an inner and outer jacket with the cooling water running in the space between them. The water space was almost blocked solid. While taking the swivel section out the lower section of the outer housing disintegrated.
The two parts have a casting date from 1985 (the boat was built in 1971) so they don't seem original. I really don't think its advisable to try to clean them out and reuse the parts. The cost of replacing the elbows on on both engines is quite high, especially when compared with the standard Lehman elbow.
My questions are, is there any special reason the two part system was installed and are there any reasons not to revert to the original set up. The two part system does seem to have the advantage of injecting the water into the exhaust further away from the engine with less chance of flooding the engines with water.
I have a GB 36 with twin Lehman 120's, we've been suffering from high(ish) running temps. After doing all the usual things, coolers, strainers, hoses etc I removed the exhaust elbows from one of the engines, its a two part system made up of a Barr 90 degree elbow and another 90 degree swivel section, there is an inner and outer jacket with the cooling water running in the space between them. The water space was almost blocked solid. While taking the swivel section out the lower section of the outer housing disintegrated.
The two parts have a casting date from 1985 (the boat was built in 1971) so they don't seem original. I really don't think its advisable to try to clean them out and reuse the parts. The cost of replacing the elbows on on both engines is quite high, especially when compared with the standard Lehman elbow.
My questions are, is there any special reason the two part system was installed and are there any reasons not to revert to the original set up. The two part system does seem to have the advantage of injecting the water into the exhaust further away from the engine with less chance of flooding the engines with water.
