Originally Posted by kerrye
Rattle is still driving me nuts. That wasn’t the solution. Also removed the turbo heat shield to see if that was the problem. No. Rattle is not as consistent now as it was when I first got it after the transmission rebuild. Have driven it about 550 miles. It’s a kind of rattly hollow rubbing/hitting sound like a spinning piece is loose and sometimes contacting another surface. Stethoscope on turbo doesn’t reveal and similar sound coming from there. Doesn’t make it upon startup. Usually starts rattling intermittently after driving a mile or two and making a sharp turn. Pretty uniformly it happens and gets slightly louder when braking for a stop. Only slightly detectable at hot idle. Wouldn’t be noticeable as a problem unless you already knew it was louder under certain circumstances. Hate to head home across country towing my boat without figuring out what’s going on.
Have you checked the downpipe?
Weak motor mounts allowing the downpipe to rub on the frame may be a source.
1996 K3500 6.5L,( "F" Eng #141 cast block) 5 speed manual, crewcab, dually longbed: 208,000mi.
Diamond Eye 4" Turbo Back Exhaust w/2.5" Flo-Pro Crossover
AirDog II DF165 w/ tank sock delete - XDP
TD-Max boost controller - Kennedy Diesel
OPS extension hose - Leroy Diesel
Glow Plug Harness- PT Wiring Solutions
Glowshift Maxtow EGT,Boost, Fuel gauges
Boost & Fuel Pressure Bolts - Leroy Diesel
2/0 Battery Cable Upgrade - PT Wiring Solutions
PMD w/#9 resistor and Re-Location Kit, mounted to bumper - Leroy Diesel
4.10 gear ratio
OptiLube Winter Formula
Proud member #1039 of The 3500 Dually Club