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Discussion Starter · #1 ·
when fitting the APEXi EGT probe/sensor, the mechanic drilled a small hole just below the top flange of the downpipe (just after the turbo - which i think it's safer) so that it could measure as accurate as possible if not to be mounted on the exhaust manifold directly (which is the best location i assume). my concern is, they didn't remove the downpipe but instead drilled a hole on-situ thus i believe those drilled metal residue will be left inside the downpipe, as metal dust or tiny pieces. is this ok coz' i'm a bit worried it may got sucked to the turbo when i started the car for the 1st time after they completed the installation?! is it true that the exhaust air only rushes out 1-way (to the rear all the time) and not the other way round ie. during gear shift maybe?! pls help...
 
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Discussion Starter · #2 ·
Don't worry - the metal will pass out of the exhaust pretty quickly.
The best place for the EGT probe is in the manifold though (which cylinder runner is open to debate). Temperatures in the downpipe will be considerably less than before the turbine.
 
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