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I have reworked all the hoses & plastic fittings on our 6.8L and happened to see this thread.
Don't know if it would work, but Amazon has a 304 SS Y fitting for 3/4" hose that looked interesting.
I just did this last night and used the @HBF method of just cutting the hoses at the ends of the old plastic wye instead of crushing them and picking out the pieces. It is definitely a faster and easier method, but I would not recommend doing it this way unless you are using the maple syrup industry stainless wye because it has extra long barb ends...much longer than the plastic wye. Even with those longer barb ends its a little scary when you consider how little hose length is left to work with in that tight spot. There is the additional issue that I had with a hose clamp (I used constant tension clamps) rubbing against an A/C line because of the shorter hose end. I added an extra layer of ~1/16" thick rubber mat around my A/C line in that spot to provide some extra protection.
It is a fairly easy job, but annoying due to the location and lack of hand room. I removed the bracket holding the MAP sensor to make more room to reach into that spot, which helped a lot. Its held on by three 10mm nuts on studs. The maple syrup industry wye design is perfect because it has the same 180*+45* geometry as the OEM plastic wye. I think the wye mentioned above with 3x120* angles would be much more difficult to use because there is not much 'wiggle room' for these hose ends. Kudos to @SmackDaddy for finding that part!
I just did this last night and used the @HBF method of just cutting the hoses at the ends of the old plastic wye instead of crushing them and picking out the pieces. It is definitely a faster and easier method, but I would not recommend doing it this way unless you are using the maple syrup industry stainless wye because it has extra long barb ends...much longer than the plastic wye. Even with those longer barb ends its a little scary when you consider how little hose length is left to work with in that tight spot. There is the additional issue that I had with a hose clamp (I used constant tension clamps) rubbing against an A/C line because of the shorter hose end. I added an extra layer of ~1/16" thick rubber mat around my A/C line in that spot to provide some extra protection.
It is a fairly easy job, but annoying due to the location and lack of hand room. I removed the bracket holding the MAP sensor to make more room to reach into that spot, which helped a lot. Its held on by three 10mm nuts on studs. The maple syrup industry wye design is perfect because it has the same 180*+45* geometry as the OEM plastic wye. I think the wye mentioned above with 3x120* angles would be much more difficult to use because there is not much 'wiggle room' for these hose ends. Kudos to @SmackDaddy for finding that part!
Looks like exactly what I did. Only issue I had due to the larger size is the hot water valve had to be moved farther forward on the engine because the bend on the output side of the valve would be to sharp.
Yes, it is tight back there, removing the MAP sensor gives more room.
I just did this repair and used the Dorman 47294 and it worked perfect. It was in stock at the auto zone but the Amazon link is below. Thanks for the help on this thread. I ended up cutting the factory plastic bands with an oscillating tool and a lot of patience.
