97 EJ25 block/95EJ22 heads/delta cams/Cometic hybrid gaskets
I have been running my frankenmotor for about 2 weeks and it rapidly developed a noise after sounding great. It is not piston slap. I had that on my Outback. This is not a constant noise. Most of the time the motor sounds great. Then a tapping noise comes in and can go just as fast. Cold or Hot doesn't affect it. Sounds like something is loose inside the block near the head gasket on the pass side #2 and #4(BB half). It's not banging, but kind of tapping with no reverb. But can change in volume as well. It doesn't sound like rod knock to me because that usually gets louder with rpm and this is usually only at idle, ocassionally. I'm thinking a loose wrist pin. Not sure what else it could be. I'm going to go pull the oil and check it, but any thoughts are greatly appreciated. I'm scared to make a video bc I don't want to waste the block. I Iiterally sold my backup EJ25 block a couple minutes before I figured out this one is in trouble. DTOH!
Another question is "Can I reuse my Cometic HGs after they've been on there for a couple weeks and maybe 400 miles?"