DexCool?

unless the waterpump issues are caused by the dexcool?

No classic green sweetness in a modern cooling system? Define modern. Seriously.

Appleseed wrote: No classic green sweetness in a modern cooling system? Define modern. Seriously.

I put green in everything.

Appleseed wrote: No classic green sweetness in a modern cooling system? Define modern. Seriously.

Yes, please.

In reply to spitfirebill:

There is a big difference between modern green animal-safe propylene glycol coolant and dollar store classic green ethylene glycol. I have been told the old-school stuff is unfriendly to a lot of modern materials and causes some nasty damage when mixed with other coolants...

Personally, I run G05 in just about everything.

The reason I asked is I put the old school green stuff in what I consider a modern system, a 95 Caprice. No carnage. Are we talking cars made in the last 5-10 years?

Leave it in if it's under warranty because if it breaks it's not your problem. When it's out of warranty, if it looks bad change it, but I bet if you follow the drain interval you'll be fine.

Actually drain interval is 5 years or 150k. So maybe don't go 150k on it. But definitely dot switch types of coolant til you are out of warranty

In reply to Appleseed:

2000-up is pretty much my rule. I wouldn't put conventional green in a modern turbo/DI vehicle, that's for sure. The LT1 is a bit of a different animal...I'm not really sure it was even "modern" in 1995!

I want to hear about what actually happens here. The only thing I can think of when silicate-heavy ethylene glycol coolant was used in Honda motorcycles and the seals on the water pump were eaten by the stuff. I think the silicate count has been lowered from what it was in the late-70's/early-80's. I may be doing some serious work to the cooling system on my VFR this winter and having the "best" coolant in the thing is something I've thought about.

Old school green stuff was great when you had all iron engines and brass/copper radiators, but I hear it is not well suited to modern metals.

Although I'm running it in my 96 SS which is an all-iron engine and aluminum radiator.

Evans NPG can be awesome as far as corrosion and reactivity is concerned, but it has a host of potential drawbacks where efficiency is concerned depending on your cooling system.

I remember all the Powerstroke guys raving about Caterpillar's CAT coolant for the diesels since it doesn't need any anti-cav additive for 300k, and some of them used it in their gas cars too. Not sure if it was based on science or just "if its good for a powerstroke..."

This looks like a space for a JPEG chart.

And I would love to include a discussion on what each of those phosphate/nitrate/silicate additives do.

They add more sweetness and fizz.

In reply to curtis73:

Anticorrosives and PH buffers, the yellow/orange/most other not green stuff has moved on to better stuff(aside from the teething issues of dexcool).