Only ever used a cover on my OTR trucks.
Current work truck is a 2008 6.4L PSD. Starts on the coldest mornings without help, and runs all day without a winter front.
Now the 2004 6.0L PoSD that preceded this truck, if it did by some miracle, start and stay running, would run all day without a winter front.
Turtle n Peeps wrote:
Unless you're running straight 140 weight in your crank case your turbo is not long for this world. I would inspect the compressor side and make sure you're not shaving aluminum. I would also see how easy the compressor blades turn.
+1
Turbo should build boost unless you have very thick oil lubing the turbo bearings.