So I am having a problem on my 1993 RX7. The car still has the stock sequential turbo setup and I am getting an audible boost leak. I had a mechanic look at it and he showed me where it was coming from after he did a smoke test. He pushed whatever it was back in but it only held for a few weeks. My question is if anyone can help me identify what the part is or point out exactly where it is on a diagram. Any help would be greatly appreciated!

Here is a photo pointing the are out (the arrow is where it seems to be loose)

 

More photos:

 

Service manual page f-21 shows those two lines in great detail. If they keep coming off, the fix is to use a better clamp. Can you pull those hoses off the pipes with your hand without much pressure or at all? If so, the clamps need replacing. Problem solved. Those hoses are for 2 of the 3 actuators. Those 2 go to the actuators attached to the turbo. The third is attached to the bottom of the manifold and irrelevant right now.

 

Those OEM clamps should be fine. The hoses themselves might need to be replaced.

If you have a boost leak, it is not likely to be coming from any of those hoses. You should check your y-pipe hoses (both sides) and your intercooler couplers for cracks. Those are the most common sources for boost leaks.

 

The hoses get baked from heat and no longer seal properly. Its very common for them to become hard as plastic. Replace the hoses and clamps and you should be fine.

 

Thank you everyone for the replies! I should be a little more clear, the hoses themselves seem fine and do not feel loose. What seems loose if the metal bit that the 2 hoses connect to. That metal bit will move around when I grab it, and on the right side I'm guessing it should be secure.

So the 2 hoses seem secure in the metal bit but the metal bit is loose and coming out (I'm guessing this piece is secured on the right side to something). Sorry I am not too familiar with the layout of the engine at all. Does my description of this make sense? Thanks again for your help

 

Ah, I understand now. That metal part is actually pressed into the casing of the turbo. It's the same as the pipe on the bottom on your throttle and the one on top of the water pump housing. Once those become loose and that press seal/fit is broken, then that's pretty much it. You can try and lightly hammer it back in and see if it holds but it's unlikely to last for very long. The fix would be to fully remove it and tap the hole it creates to accept a barbed fitting of equal size. You may or may not be able to do that in the car. I wouldn't recommend any adhesives to get the pipe to stay intact as that environment is likely to melt it and if it runs or drips onto the wheel, then it can cause bigger problems.

 

Thank you! I have found some other pictures online so I could understand what it was. Here they are so others can reference it in the future:

 

The leak could actually be coming from where the Y-pipe bolts onto the primary turbo. That's a gasket in there, the original gasket was paper and is very prone to leaking. The new gasket is metal and lasts pretty much forever.

Dale