6.5 popping back in intake
#1
6.5 popping back in intake
I picked up a 96 K3500 6.5 cheap awhile back and it is making a noise through the intake, kinda sounds like hitting the bottom of an empty barrel. Pulling the upper intake it sounds like it is coming from #1 cylinder by running a piece of hose down each runner and listening. I can also feel air pushing back through that runner with my hand while idling.
I have read up on possibly a non seating intake valve and possibly a broken intake valve spring. The cylinder will hold shop air just fine and is not leaking back into the intake, I also swapped out the intake valve spring with no help at all. All valves appear to be working by watching it run with the valve cover off.
The truck seems to run just fine, no abnormal smoke or misfire that I can tell and no check engine light at this time. I'm kinda running out of ideas here.
I have read up on possibly a non seating intake valve and possibly a broken intake valve spring. The cylinder will hold shop air just fine and is not leaking back into the intake, I also swapped out the intake valve spring with no help at all. All valves appear to be working by watching it run with the valve cover off.
The truck seems to run just fine, no abnormal smoke or misfire that I can tell and no check engine light at this time. I'm kinda running out of ideas here.
#3
#7