1970 Olds Cutlass S Rat Rod Style

[Ugly1]

Pulled the plugs, they all looked like the same. It definitely sounds external or totally different that the last few rod knocks my Olds have developed, almost tinny in person. If the motor isn't screwed, I am considering going to my Qjet, Performer and manual control of the 4L80E and putting the Terminator X Max on my Dakota, for a few reasons on both vehicles. I had to move it to put the Dakota in the garage. I finally changed the Dodge factory tiny 6 gauge battery cables to 1 gauge cables. It didn't like -40 despite a 850 CCA battery, factory mini starter and our Coop full synthetic 0W30. Even they look tiny compared to the 4/0 cables I put on the Olds. We have a snow storm coming, other than moving snow tomorrow, I plan on a more through inspection tomorrow, including disconnecting the torque converter, running it disconnected and really inspecting that area. I have never seen a real knock go away after initial start up, usually the knock gets louder as oil pressure goes to nothing, not 40 psi at 750 rpm.

The one thing that might be possible is piston slap. It just occurred to me. It can sound like a rod and I’ve had it on a fresh rebuilt motor. It’s the piston rocking in the cylinder. It may be the piston, the cylinder, or the wrist pin. I think my brother told me “just drive it”. You could get a “Automotive Stethoscope: For Enhanced Noise Detection in Engines” and see if it’s high or low on the block. You can find them for around $12

 

[olds307 and 403]

Good thinking, have one of those stethoscopes. I will put it on stands this weekend and run it. I also have a new bore scope coming.

 

[Sweet_Johnny]

I can't remember if the oil pump has been accused yet or not but Melling had a bunch of them that were noisy as all hell. I almost went insane trying to pinpoint that noise once, and it certainly had me thinking a bearing was out.