So I've got loud lifter noise in my engine, been going on a week now? Cannot find the culprit, and as of two days ago I noticed a dull knock too. I at first thought it was a vacuum leak or exhaust leak, but I have checked everything I can think of and I cannot feel any air or exhaust escaping either. I have a block off plate that used to leak, but no exhaust is escaping from it this time. I fear that I may have some sort of issue with cylinder 1 (no codes though). I used a stethoscope to try to pinpoint where the dull knocking I hear is coming from as well as specifically which cylinder the lifters are noisiest around. Everything is pointing to cylinder 1. I used my knuckle to feel for the vibrations consistent with the knock and it's indeed coming from there. When I unplug that coil pack the knocking vibration goes away. Yeah, even though the engine is shaking due to a cylinder not firing when I do that test, I can still tell that the vibration I was feeling ceased. Lifters are noisy regardless. I believe as of now the knock mentioned above is coming from the bottom end. It's dull and hard to hear over my exhaust and the engine, but it's there. I can only hear the knocking if I listen in closely or if i'm laying down next to my truck with my head underneath.
-oil level is normal
-RPMs at idle normal
-only driving habit I've changed recently was driving in 3rd in town
Brandon isn't here this weekend to consult with in person, so I've had to text him, he's unsure without taking a look for himself. If I find out I've got a rod knocking for sure, is it worth rebuilding with a rebuild kit or should I just go and swap in another 4.2? Like an '08? That year 4.2L had 285hp. I've looked at a few online that were alright prices I guess. 5.3 is out of the question, barely anyone has done a full swap and documented it, not to mention it's pricey to get everything needed to properly swap it over. AND this is my D.D., i'd sell my Cutlass to do the swap.
-oil level is normal
-RPMs at idle normal
-only driving habit I've changed recently was driving in 3rd in town
Brandon isn't here this weekend to consult with in person, so I've had to text him, he's unsure without taking a look for himself. If I find out I've got a rod knocking for sure, is it worth rebuilding with a rebuild kit or should I just go and swap in another 4.2? Like an '08? That year 4.2L had 285hp. I've looked at a few online that were alright prices I guess. 5.3 is out of the question, barely anyone has done a full swap and documented it, not to mention it's pricey to get everything needed to properly swap it over. AND this is my D.D., i'd sell my Cutlass to do the swap.