LBZ Duramax radiator and lower hose O-ring replacement DIY

LBZ Duramax radiator and lower hose O-ring replacement DIY. I explain the lower hose connection O-ring situation and what you can use.
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Radiator used: www.summitracing.com/parts/os...
Standard 226 silicone O-ring: www.amazon.com/dp/B000FMWQI2?...
MA O-ring set: www.merchant-automotive.com/L...
Dorman O-ring that doesn't work: www.oreillyauto.com/detail/c/...

[@richardmobley7694]

I just discovered the same issue with my replacement o-ring. Parts store told me it was an exact match! Definitely way too fat to fit

[@josh666675]

It’s wild mines leaking right where your bunny strap is holding it back. Literally right in between that seam. And I don’t want to do this hose assembly because I just literally replaced everything else

[@josh666675]

Bungy straps holding it

[@DownNDirty_OffRoad]

That sucks

[@yota201134]

Sorry I got lost. So does the 226 o-ring work? Or do I need the one from merchant?

[@DownNDirty_OffRoad]

The 226 is still working. I never tried the one from Merchant, but it was thicker than the original and the 226.

[@abadzl1455]

The larger O ring is for the upgraded "new style" hose assy by AC Delco. The new design, if you ever replace your lower hose assy will only work with the larger o ring. It comes with it installed. The older original style hose uses the small one.@@DownNDirty_OffRoad

[@DownNDirty_OffRoad]

Good to know, thank you!@@abadzl1455