06 CM870 450 ISX egr tuneup

[tree98]

(09-29-2019 )DDlighttruck Wrote:  

(09-29-2019 )Chamberpains Wrote:  What does the the travel of the arm on the VG ring measure. Is it free moving with a slight high pitch metal screech to it (normal)? Does the shaft move up and down at all (signs of wear)

I have roughly 1/2” of travel. Using a mark and a tape measure. Using a blow gun to feed it air the dial indicator spun too fast for me to count the times it went past 0

The arm on the turbo, you’re asking how far did it travel? It seemed to travel the same distance with the actuator on or off, moving it by hand

That’s probably not precise enough to give you the answers to what you were asking me

As I mentioned on the first page of this thread, the VGT on an 870 is supposed to move 12mm (real close to your half inch) so if your actuator is moving the full stroke and apparantly it is, you need to make sure the VGT ring on the turbo is also moving full range. It appears as though yours is sticking? Mine was sticking a while back because the truck sat for 5 or 6 weeks, but I was able to free it up by working it back and forth a bit.