hey guy,

got a strange one, IDK, maybe you have seen this?

I noticed antifreeze leaking on the ground, so I'm looking to see where it'* comming from, and find it'* the elbo

I replaced the belt tensioner and a blown out plastic elbo with the Aluminium replacement, last April, 2016
today, replaced again

take a look, the elbo on the left, the O-rings have actually dissolved and are smeared all around the elbo no sealer was used, the orange color around the o-ring, is actually the o-ring dissolve flow

WHats up with this?



the elbo had came from Help section at aap

the coolant was Service Pro, all makes/modes green (Glockner)

They all do that. Even the older plastic ones.

so whats the deal?

Acid rain.

Try these O-rings.

GM P/N 25537068 (AC Delco P/N 15-34066 for the 3 smaller ones, and GM P/N 24502846 is the bigger one.

https://www.amazon.com/ACDelco-15-34.../dp/B001S8FWA6

https://www.amazon.com/ACDelco-24502.../dp/B00JM6MEDY

They may be the ones Dorman use now, but just in case they aren't I'd go with these.
I'd not lube them when installing with anything other than clean/new antifreeze, to be on the safe side.