Looking for a MD2020 high rise exhaustelbow. You can find the standard low rise, even in cast stainless, easy. The high rise is like looking for unicorns.
Is using a brass plumbing spring loaded check valve in the exhaust hose a viable option ?
Looking for a MD2020 high rise exhaust elbow. You can find the standard low rise, even in cast stainless, easy. The high rise is like looking for unicorns.
Is using a brass plumbing spring loaded check valve in the exhaust hose a viable option ?
Are you telling us there is such a thing off-the-shelf?
I had a quick look and I can't find a high rise one
VP makes a bronze high rise exhaust elbow for the D1-20 engine that will bolt on to the MD 2020 manifold, but the water hook up is not exact, and will require some adapting.
I am saying this is what is on the engine RIGHT NOW !
One UNSUCCESSFUL attempt was made. The two hole leading into the elbow did not line up.
Sorry! I must be going blind because I didn't see where you said " this is what is on the engine RIGHT NOW !
AND I wasn't aware you had made One UNSUCCESSFUL attempt to make one up. I don't know why your attempt was unsuccessful as I had no problem.
Just reading some threads, the old ones were "high rise" and the newer are " low rise". I really wouldn't be able to tell the difference between a high rise and a low rise but if you look here you might see the one you want.
VP makes a bronze high rise exhaust elbow for the D1-20 engine that will bolt on to the MD 2020 manifold, but the water hook up is not exact, and will require some adapting.
Might be worth looking into. VP part # 3884165
Nope !
The rubber "boot" from the heat exchanger makes and immediate 90° into the water inlet nipple on the elbow. No room for adapting.
As I now recall that was a carry over from the old Perkins M20/M30 Pirama engines, and may also be available from Perkins.
Whether the standard elbow can be used is a function of the configuration of the rest of the exhaust system. Seems to me that if someone went to the trouble to install the riser in the first place, its probably necessary.....
Put the salt water supply vacuum break in the inlet hose between the saltpump and the heat exchanger. Use the later style down turn elbow (which they have). Make sure there is a vented loop in the exhaust down stream of the water lock muffler.
Go over to Defender and look at all the gooseneck and waterlock mufflers that can be had in plastic/GRP for < $200. Use the low-rise elbow in hand and install one of those if you have the room to make it fit. All designed/intended to keep out water from a following sea, cheaper than the Volvo part, and probably more effective.
Use rubber exhaust hose all the way to the stern.
Then us 90 deg stainless steel welding elbows (bends) and some pipe to first go up vertically and then to a fabricated gooseneck. (Two 90 deg bends welded together) The top of the gooseneck can go as high as decklevel or just below that.
The exhaust pipe (downleg) can of course be much lower in the stern.
Backflow impossible.
It works perfect for me already 20 years