If I request a CLI would it cause my score to go down when it first reports?
I am not looking an "over time" answer, but what would a result immedetl be as soon as a CLI reports.
The CLI itself never hurts your score. If it results in a hard pull, however, the hard pull can hurt your score.
PS. There's a weird exception, and that is if your CLI causes the CL to go up to an absurdly high CL. Extremely high CL credit cards are dropped from your total CL in some FICO models. If a big CL is suddenly dropped from your utilization calculation, that could hurt your score, depending on how much CC debt you have.
As long as the final CL (after the CLI) is < 34.9k that appears to be safe for all models. A 50k CL appears safe for FICO 8.