engine coolant question

[Bill S.]

i picked up a product called pro blend which is supposed to run cooler than anti freeze. it is compatable with ethenyl glycol does any one know of or have experiance with this product. i have a 66 L72 fresh rebuilt and thought it might keep it cooler. bill

[Paul B.]

Re: engine coolant question

Funny you should ask Bill, I had a can of that in my hand today and was wondering the same thing? IIRC, there is an issue with longterm use in aluminum radiators?
I'm sure someone in the know like Duke will chime in and edify us.
Paul

[Duke W.]

Re: engine coolant question

I don't recommend coolant additives. Modern antifreeze blends (I recommend a HOAT antifreeze for vintage Corvettes mixed 50/50 with distilled water) have everything needed to both cool the engine and protect all cooling system materials from corrosion. There is no guarantee that some snake oil in a can is not going to have a compatibility problem with the antifreeze chemistry, and if you really think its going to prevent overheating, I have a bridge to sell you.

SHP big blocks will have much less tendency to overheat at idle and low speed if they are converted to full time vacuum advance.

Duke

[Paul B.]

Re: engine coolant question

I figured who wouldn't be too far Duke!
I don't believe that it's an additive, but rather some type of ethylene glycol substitute. The can said to mix with straight distiled water if I remember correctly. Perhaps it is a product like Water wetter? Here is the link to the web site.
Paul

http://www.pro-blend.com/coolsys.htm

[Duke W.]

Well...

...if you want to do a R&D project with your vintage Corvette, let us know how it turns out.

If it's overheating, find the root cause and correct it. When new, SB Corvettes did NOT have overheating problems. Big block cooling system reserve is a lot less, but this can be mitigated to a great degree in most cases by converting ported to full time vacuum advance.

The key is to make sure cooling system related components meet OE specs and are in good working order.

Duke

[Bill S.]

Re: Well...

stay away. numbers on can are disconnected. will return. would not trust it as can is already rusting. bill