Volvo Penta V8 380 C-D Impeller Chunks - Backflush?

[ThndrSki]

New to the Volvo Penta motors after plenty of experience with Carb'ed Mercury/Mercruisers. I just replaced the impeller on a new to me Volvo Penta V8 380 C-D, which had a few chunks missing.

I've heard a few people on the 'nets suggest a backflush, but this is also a closed cooled motor. I do see on the coolant routing a smaller line passes through the fuel pump and into the exhaust elbow. Anyone with experience here on 1. Yes or no to Backflush? and 2. Where is best to do it? Pictures of my impeller below:

 

[AllDodge]

Those are small enough pieces I wouldn't bother with back flush

 

[ThndrSki]

Those are small enough pieces I wouldn't bother with back flush

Thanks AllDodge. That what I was thinking but didn't know if the downstream smaller hoses through the fuel pump/elbow would clog. I appreciate it, esp. being new to this VP motor.