Flush entire loop before use or not?

[Ricky55]

Hi guys

I’m finally ready to complete my loop. I’ve flushed my EK rads with a white vinegar solution and got very little if anything out. Can I now fill the loop with my mayhems white or would you recommend that I flush the entire loop before using the mayhems? I have some distilled water.

As the title says this is a brand new loop with all new parts.

 

[LuckyBenski]

Blocks are generally pretty clean when new as they're assembled from parts rather than soldered and painted. It's mostly radiators that need cleaning due to the solder flux, paint scraps, and other manufacturing byproducts.

I'd say you're OK HOWEVER - I wouldn't leak test with coloured coolant. Use the distilled to look for leaks, then drain and refill.

No one wants white coolant on their carpet. Ask some of the users here.

 

[MikeTimbers]

Leak test with water and paper towels. Then refill with the paper towels still there. Put some serious heat load into the system to check nothing leaks under pressure.