I will make this comment based on a new factory engine my brother bought in about 1972.
It was one of the 250 CID Chevy inline 6cyl crate motors that was supposed to be a universal replacement for both cars and light trucks. This was a factory Chevrolet crate motor bought from a regular Chevrolet dealer.
The car we put the engine into was a 63 Chevy II Nova. It came from the factory with the wrong oil pan, oil pump pickup and dipstick. The Chevy IIs had a front sump and all others had rear sump engines.
The dealer gave us the other parts and we pulled off the factory delivered pan and oil pump pickup. Inside the pan we found about a teaspoon full of foundry pattern sand that would have been sucked up by the pump. Since the engine had been tested at the factory there was probably some of the sand already in the system. We cleaned out the block as best we could. Most of the loose sand seemed to have drained into the pan with the oil. We completed the engine swap and it ran great. We changed the oil after about 100 miles. That engine was still producing over 185 PSI compression on all cylinders when it was sold about 15 years later.
It was one of the 250 CID Chevy inline 6cyl crate motors that was supposed to be a universal replacement for both cars and light trucks. This was a factory Chevrolet crate motor bought from a regular Chevrolet dealer.
The car we put the engine into was a 63 Chevy II Nova. It came from the factory with the wrong oil pan, oil pump pickup and dipstick. The Chevy IIs had a front sump and all others had rear sump engines.
The dealer gave us the other parts and we pulled off the factory delivered pan and oil pump pickup. Inside the pan we found about a teaspoon full of foundry pattern sand that would have been sucked up by the pump. Since the engine had been tested at the factory there was probably some of the sand already in the system. We cleaned out the block as best we could. Most of the loose sand seemed to have drained into the pan with the oil. We completed the engine swap and it ran great. We changed the oil after about 100 miles. That engine was still producing over 185 PSI compression on all cylinders when it was sold about 15 years later.