Engine Knock?
#1
Engine Knock?
While plowing snow last night I was up against a hill with the window rolled down. From a slow start I could hear a very loud KNOCK similar to a rod knock. I've never heard that before. As soon I get going it is gone. Also cannot hear it with the window up or just revving it. Maybe it is all the snow packed up under the truck? I did put some fuel additive in the other day...PowerService, think that caused it? I let the Diesel tech at work listen to it and he says it sounds SWEET and tight to him. ****.. to be concerned or not?
#4
My 03 did the same thing, when letting out clutch in 2nd gear, engine would make a LOUD "clack, clack, clack" noise then go away at about 1000 rpms or so. I stopped buying fuel from the local "mart" at started buying from truck stop down the road. Pay 15 cents more per gallon , but NO MORE CLACK, and MPG went from 18 to about 21-22. Also I use FleetGaurd FleetTech fuel conditioner every 4 th tank. Recommended by Rocky Mountain Cummins.
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