I understand that an engine should be pre lubed before the first start after a rebuild but if the mechanic that rebuilt the engine used whatever they use, some kind of grease on all the parts, wouldn't that be good enough? A friend of mine said that he has rebuilt a number of engines with the grease stuff and started them as is and never had an issue. It seems like a pain to do the pre lube if it's still greased up. But I don't want to waste 5k on a rebuild. Would pouring oil over the rockers and letting it drain down help some?

Brad
Sierra Vista Arizona
1954 Lincoln Capri

The sensor you have is almost certainly 1/8” NPT. Most oil pretty switches are. If it’s a light, it’s a switch. If it’s a gauge, it’s more sensitive. Most old cars would have either a mechanical oil pressure or just a light. I’m guessing yours is a light. Those operate at 5-10lbs pressure in my experience.

So if you measure the outside diameter, and it .4, just under 1/2”, it’s 1/8” NPT.

Picked up from the internet.

“The dimensions for a 1/8 inch National Pipe Thread (NPT) are:
Outside diameter: 0.405 in
Handtight engagement: 0.1615 in

NPT threads are tapered, so the nominal diameter is the diameter in the middle of the threaded portion. The outside diameter of an NPT fitting is usually about 1/4 in larger than the fitting's name. “




miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ