swathdiver
Full Access Member
A week or two ago, while we were removing the wheel well liners, we noticed that the #4 spark plug was loose. The wire and shield were bouncing around and exhaust gases were coming out from around the plug. No misfires or CELs.
A few days later I inspected the plug, screwed it back in and put dielectric grease on the plug tip and wire that connects to the coil. All was good when we fired the engine.
On Saturday my daughters changed the oil and filter. Well, they drained the oil on Saturday and put the new filter on about 1/2 full of oil and on Sunday morning filled the motor with oil. Oil level is good. The next day we fired the motor and it made a funny sound that I cannot remember anymore and was also smoking, like an exhaust leak around #2. This turned out to be spilled oil.
On Thursday night we fired the motor again, I was at the wheel and it took a moment for the oil pressure to come up. This usually happens when the truck sits for more than a week. AFTER the pressure came up, a ticking sound began on the right bank, around #4 or #6.
Tech-2 shows no misfires and turning off those injectors results in dropped rpms. Took her for a test drive and she runs normal and as before, even on the highway. Traffic did not allow me to go full throttle.
Today the motor started again quiet but seconds later the tick started on that side. When using the mechanics stethoscope, we hear it in the injectors, loudest on the right bank and at #4. The exhaust manifolds are quiet, intake is quiet, touching the valve cover bolts, you can hear it a little. It can barely be heard on the driver's side outside, but you can hear it good on the passenger side even walking towards the rear of the truck.
The motor is on E85 currently, 3/4 tank. Fuel Trims are great, better than normal and at or close to zero (LTFTs).
Any ideas?
A collapsed lifter with no misfires?
A few days later I inspected the plug, screwed it back in and put dielectric grease on the plug tip and wire that connects to the coil. All was good when we fired the engine.
On Saturday my daughters changed the oil and filter. Well, they drained the oil on Saturday and put the new filter on about 1/2 full of oil and on Sunday morning filled the motor with oil. Oil level is good. The next day we fired the motor and it made a funny sound that I cannot remember anymore and was also smoking, like an exhaust leak around #2. This turned out to be spilled oil.
On Thursday night we fired the motor again, I was at the wheel and it took a moment for the oil pressure to come up. This usually happens when the truck sits for more than a week. AFTER the pressure came up, a ticking sound began on the right bank, around #4 or #6.
Tech-2 shows no misfires and turning off those injectors results in dropped rpms. Took her for a test drive and she runs normal and as before, even on the highway. Traffic did not allow me to go full throttle.
Today the motor started again quiet but seconds later the tick started on that side. When using the mechanics stethoscope, we hear it in the injectors, loudest on the right bank and at #4. The exhaust manifolds are quiet, intake is quiet, touching the valve cover bolts, you can hear it a little. It can barely be heard on the driver's side outside, but you can hear it good on the passenger side even walking towards the rear of the truck.
The motor is on E85 currently, 3/4 tank. Fuel Trims are great, better than normal and at or close to zero (LTFTs).
Any ideas?
A collapsed lifter with no misfires?
