Re: '55 engine back to life! Mostly worked...

Posted by Bob E. On 2018/8/4 12:57:29

I've been playing around a little more with the engine, trying to get a smooth idle etc. Along with that, I did a comparison of oil pressure from my OTC gauge (plumbed with the existing oil pressure sender) against the dash gauge.

The reason I get spooked is that at idle (~500rpm) the dash gauge barely reads above L. The OTC gauge shows about ~30psi there which seems like that is plenty at idle.

Is this normal for your car?


Separately, there is this metallic almost hollow knocking sound that occurs at the crankshaft speed. It speeds up and becomes less noticeable as rpm is increased and most pronounced when rpms are reduced to idle. (Oil is at F, and good pressure). The sound seems to be coming from inside the engine as I can hear it more clearly through the oil fill tube when I take the breather cap off. I have an audio recording of it which I can send but that file type won't upload here. I seem to remember it being there before I had the engine rebuilt. Any thoughts?

thanks again for reading and all your comments.

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