It’ll be a Time-Sert installed with head on the block (unless everyone here shouts otherwise). Mechanic says the cylinder looks clean so far with boroscope. Should only take a little time, if it’s unsatisfactory we can always pull the head and readdress it. Checking all plugs for signs of back out, all coils for overheating. Checking for vacuum leaks. PCV & lines are new 20k mikes ago. Replacing all coils/plugs/gaskets. I didn’t personally install the current plugs I’m hoping to understand why they (at least #4) came so loose.
What else would you recommend?
I have been hearing a manifold tick last year or so getting increasingly worse. Likely it was the plugs, we’ll see. A slight loss of power last couple of weeks, not noticeable to anyone but me, and a little less smooth. The rough idle and knocking came on pretty quickly. I noticed it driving my wife to work. Two miles later she noticed it. I continued 4 miles on to her work by then it was making my nervous but was less above 2k rpm. I drove an easy 20 miles cruising along at 50mph to my kids swim meet, knocking was pretty consistent but didn’t sound deadly. (t + 25 miles) Then I posted here, it didn’t go away but got worse. I foolishly drove 25 miles home in slow 2-lane traffic with lots of lights. Up a steep 1/2 mile driveway, then I’m pretty sure it blew just after shifting into reverse to park at my house. 50 miles from relatively normal to blown plug and disintegrated coil. I know I could have made some better decisions but that’s in the past. I’m looking for the best path forward now.
Could this be related to my previous occasional P0156 code? Either cause or symptom? What else to look for? Just rebuild & monitor?