antifreeze c2 327/300

[Michael F.]

Re: antifreeze c2 327/300

In all the years of having to change my antifreeze, I always just drain the radiator and take off the lower radiator hose. I like others here , don't believe theres really all that much left in the system to do any harm. Where I live, a very small town, the township takes in any old paint, solvents and or anti-freeze so the street drains arn't contaminated. If I killed anyones pet because of not catching the stuff before it had a chance to do any harm, I'd never fogive myself.

Theres a gallon in the block. Open the plugs and drain. Rust and crap collects at the block plugs. All the flushing in the world will not remove the crap unless the plugs are removed. Try it you will be very surprised.

[Clem Z.]

Re: antifreeze c2 327/300

when draining the block thru the side pipe plugs after the fluid stops running take a piece of stiff wire and insert it into these holes. do this because i have seen junk plug up these hole before the block is completely drained and there was old coolant still left in the block. i have seen boat engines have the block cracked when this happened and the owner stored it in a area where there was freezing weather because when the water flow stopped he though the block was empty of water

[John G.]

Re: antifreeze c2 327/300

That's one way to kill the rats in the sanitary drain system, Ha!

I have concerns primarily when I flush the system. The volume is too much to capture for recycling, and difficult to do if you pull the side plugs (which is no easy task on engines with side mounts). I used to just let it go into the street gutter (not the radiator drain, just the water flush), but I am concerned for the pets and the law now.

I'm getting ready to do it again when our cool season gets here, so I am interested in a good method as well.

Stu Fox

A new law that takes the 'sweet' out of antifreeze is scheduled to take effect on January 1, at least in TN. Other states are following suit.

http://news.tennesseeanytime.org/node/4357

A recent court case may have been the impetus for this law. The case involved a lady who poisoned two husbands with antifreeze for their life insurance policies. She almost got away with it.

[Boyan B.]

Re: antifreeze c2 327/300

It was either Duke or a technical article that Duke gave me regarding G05. I distinctly remember the article saying "G05 is backwards and forwards compatible with all antifreeze." I would still say this is true but would caution to get DEXCOOL completely out, just in case. I am sure it is compatible with GREEN antifreeze.

By the way Duke, just filled my 63 with GO5, everything brand new in the system and would you beleive, not ONE SINGLE leak!!!! Just as I was beside myself with that shock, my wife pulled up in our Yukon and the water pump in the Yukon started leaking.

Boyan

[Jim T.]

Re: antifreeze c2 327/300

It was either Duke or a technical article that Duke gave me regarding G05. I distinctly remember the article saying "G05 is backwards and forwards compatible with all antifreeze." I would still say this is true but would caution to get DEXCOOL completely out, just in case. I am sure it is compatible with GREEN antifreeze.

By the way Duke, just filled my 63 with GO5, everything brand new in the system and would you beleive, not ONE SINGLE leak!!!! Just as I was beside myself with that shock, my wife pulled up in our Yukon and the water pump in the Yukon started leaking.

Boyan

Boyan does your Yukon's owners manual say to use a GM supplement added to a coolant change?
My 96 LT4 and 96 Monte Carlo came with factory installed DEXCOOL. Both owners manuals have the GM supplement information addition with coolant changes.

[Duke W.]

Re: antifreeze c2 327/300

It was either Duke or a technical article that Duke gave me regarding G05. I distinctly remember the article saying "G05 is backwards and forwards compatible with all antifreeze." I would still say this is true but would caution to get DEXCOOL completely out, just in case. I am sure it is compatible with GREEN antifreeze.

By the way Duke, just filled my 63 with GO5, everything brand new in the system and would you beleive, not ONE SINGLE leak!!!! Just as I was beside myself with that shock, my wife pulled up in our Yukon and the water pump in the Yukon started leaking.

Boyan

It would probably be a good idea to use a couple of Bar's Leak tablets that all the OEMs use on a freshly restored engine and cooling system.

In my experience, Dexcool has more tendency to leak because it doesn't have any salts like IAT or HOAT that tend to plug tiny leaks. For the same reason Dexcool leaks are tougher to chase down because it doesn't leave much of a trail.

I've never had an OE pump last more than 50K miles including two Mercedes, but the jury is still out on my '91 MR2 as it only has 45K miles.

So now, Boyan, you have a job for New Year's weekend, instead of watching football.

Any IAT or HOAT left if you switch to a OAT can reduce the effectiveness of the OAT corrosion inhibitors. It's less of a potential problem the other way, but I always recommend a thorough water flush when changing antifreeze types just to be on the safe side.

And, of course, I always recommend pulling the block plugs for all coolant changes.

Duke