Poly 318 Timing Chain - How Slack is Too Slack?

Rob Posted 2020-09-21 6:14 PM (#603431) Subject: Poly 318 Timing Chain - How Slack is Too Slack? Elite Veteran Posts: 990 I had to replace the fuel pump on my '58 Plymouth poly 318. While the pump is out, I stuck a finger into the fuel pump hole, I can really move that timing chain. At what point should I be concerned about the chain being too loose? Powerflite Posted 2020-09-21 10:48 PM (#603441 - in reply to #603431) Subject: Re: Poly 318 Timing Chain - How Slack is Too Slack? Expert 5K+ Posts: 9684 Location: So. Cal Check the play at the distributor as you move the motor back and forth. If the play is more than 10-15 degrees, you should definitely change it. Edited by Powerflite 2020-09-21 10:49 PM Rob Posted 2020-09-23 9:04 PM (#603530 - in reply to #603431) Subject: Re: Poly 318 Timing Chain - How Slack is Too Slack? Elite Veteran Posts: 990 Thank you, Powerflite.