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+1 on pressurizing intake via vacuum cleaner or air compressor (make sure not to exceed 14psi or so). Starting fluid works ok but nothing beats knowing that your system can hold the pressure.
+1 for this, does anyone know where i can buy the adapters that fit on the end of the intake to an air compressor?
I removed the airbox, put a silicon-glove above the open part and connected the snoke line to the hose that connects to the brake accumulator and started the flow.. What I did not expect to happen: the smoke came out of the exhaust and no pressure builded up! Is this expected behaviour? I would have guessed that there is no connection between intake and exhaust as there is no overlap in the MSP. Did anyone else try this? If yes, did it go the same way?
I removed the airbox, put a silicon-glove above the open part and connected the snoke line to the hose that connects to the brake accumulator and started the flow.. What I did not expect to happen: the smoke came out of the exhaust and no pressure builded up! Is this expected behaviour? I would have guessed that there is no connection between intake and exhaust as there is no overlap in the MSP. Did anyone else try this? If yes, did it go the same way?
Is your secondary air injection pump valve fully open for some reason?
I asked a friend to do the same test and he had the same results (smoke from the exhaust when pushing it in the intake. Luckly he has a disassembled engine and had a look on that.
In the first picture the apex seal sits just in between intake and exhaust, together with the side seals and corner seals the connection between intake and exhaust should be gas-tight.
If the rotor is in a different position, just like in picture 2, there is a connection between intake and exhaust side as the sideseals are running across the ports and there is a non gas-tight connection on the inner side of the rotor between the side seals and the oil seals . As this part of the rotor does not see compression this does not matter for the engine operation, but in steady state there will always be a passage between the two sides though this connection (even if one rotor is positioned as in picture one, the other would make a connection as in picture two).
So it seems our intake can only be smoke tested with the exhaust together. My exhaust was leaking at the connection to the muffler in cold state so I wasn't able to put a significant amount of pressure at the system so I cannot be sure if there are any intake leaks after the test.
12-12-2019, 10:07 AM
