In regards as to whether V8 is same as TD5, I have noticed dust all the way up to throttle body on my V8 DII.
Changed filter and cleaned all the plumbing, within 5,000 km's fine dusting through all the piping between airbox and throttle body. My thought is that dust is getting sucked in around the seal between MAF and air box, as all sides of my air filter rubber were clean and showed no signs of dust going past. Inside airbox lid was also relatively clean, in comparison to MAF and futher downstream.
Has anyone tried aftermarket piping? Maybe a better seal?
I was having dust ingestion issues on my D2a from new. Any period on a dusty road would see the air filter inundated and dust get through the filter into the intake pipe/MAF etc. I sealed the box with vasoline and was certain that it was sealing properly.
I eventually tracked it down to where the air was sourced from. My D2a sources air from the void between the inner and outer guards. There is a large hole at the bottom rear end of the guard (adjacent the the front mudflap). Dusty air was being sucked from imediately behind the front wheel and up the guard void and into the air intake. I fabricated an alternate intake pipe that forced air to be drawn from behind the headlight (photo attached). I have not had any dust ingestion problems since.
Had this problem on my Dad's. We cut the top off the pipe that comes into the airbox. So instead of all air being forced against the engine side (driver side) of the airbox and trying to pass up through a small part of the filter, the air passes through a larger area of the filter. We noticed that only the engine side (driver side) was becoming filthy and the rest of the filter was "cleaner".
Once we did this, problem solved and the filter has consitent "filth" trapped across it now.
*When I mention engine side (driver side) I am not talking about post filter, but the actual side within the airbox.
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