Join Date: Sep 2009
Location: The Glorious Peoples Republic of New Jersey
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i doubt that the knock is caused by worn oil.
the timing is controlled by the IP, and pop pressure. if you developed an engine knock its usually one of those two issues.
i would pop and flow test your injectors first then go from there.
raising the viscosity of the oil, you can't 15w-40 is the normal, unless you want to go for regular 30w, but then you will loose the operating temp viscosity.
i would run the truck and use a stescope to find where this knock is coming from, and then go from there.
be forewarned that these engines are nortious for having their 1st cylinder to be off a bit just enough to cause it when its cold on my trucks anyways.
99 3500 Built DTT Auto, 600 lower TC, 3.55, 4x4, BHAF, 6" lift, ARP's, Danin Optix, Gauges, DAP 100hp sticks, FASS 95, 2LO kit, HIGH Idle, Silencer ring delete, 4" exhaust, SMARTY, 03 VW PASSAT 1.8T Big Thanks to (FTE Diesel),(DAP),(DTT)
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