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Showing results for tags 'Tapping'.
Found 3 results
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Hey I have 120k miles trucks torque converter has been progressively gotten worse with the shuttering. I believe it’s time for a rebuild. I now have heard a knocking/tapping sound that is so light and high pitch I can’t hear it on video. I changed my oil about 100 miles ago and since have heard this sound coming from the oil pan/bell housing area also heard lightly infront of the truck. Does it at idle and in neutral. Not sure if it does it in drive or under load the sound is not sequential with the engines rotation. Could this be my converter? I’ve heard lifter failure and lifter knocking in my previous 5.3 trucks and it’s not like that at all. More out of time and random. If in park and I give it a little throttle the sound gets a little louder but still not in sequence with the engine. Almost a light popping sound more than a knock. Any help would be great before I spend the money on a trans and then have to turn around and rebuild the engine. -
So I am at a loss here. I have had an issue with my 2012 Silverado 1500 LT where cylinder 1 eats spark plugs for whatever reason. No big deal I just keep a spare and swap them when I need. That’s happened 3 times since I’ve owned it. The other day I am on the highway running probably 75 when it started running rough, tapping and the check light started flashing. The tapping was like a pen on a desk not a knock. I pulled right off and checked the oil and no. 1 plug. Oil was a lil low and I swapped the plug but the problem persisted. I drove it another 15 miles doing 55 and the light changed to solid and the misfires and tapping went away. I still have a light on solid reading the codes p0300, p0466, and p0300. I am inclined to change plugs and wires along with an oil change. I still have oil life left and is full synthetic and I did plugs and wires a few years ago. Has anyone had similar experiences?
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454 Vortec Tapping and Knocking
RW22 posted a topic in 1988-1999 Chevrolet & GMC C/K GMT400 Platform
I have a 1997 k2500 Suburban with the 7.4 vortec. It is a 290,000 mile engine and I was recently doing some work to it. I put new injectors, valve cover and upper intake gaskets, distributor, plugs, wires, and a fuel presssure regulator. This engine was fine before and the only reason I had done this work was because it was cranking for about 5-8 seconds before it would start. When I put everything back together, I got the timing as best as I could (I do not know how to properly time these newer engines) and started it. Immediately, the engine was shuttering and I could hear what sounded like a lifter tap. It was idling very rough and after about 4-5 min a louder knocking sound started up. I immediately cut the engine and checked the oil for metal, and there was none. I am simply baffled at this as I didn’t touch anything when I had the valve covers off. My only two ideas are this. 1) it is not timed right, and I need to figure out how, or 2) the old distributor had some wear on the gear, and possibly the cam has the same wear and isn’t working right with the new distributor. Any help on this would be greatly appreciated. Thanks.
