Straight water ok??? - Team Camaro Tech
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post #1 of 9 (permalink) Old May 8th, 07, 11:06 AM Thread Starter
 
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Straight water ok???

After freshening up a mid-80's 350, I added just water to the cooling system, as I was going to flush it a few times before adding 50/50 water and coolant. Is it bad to have straight tap water in the system instead of the mix? I could be wrong, but the other day, I turned on the heater and it didn't seem to have the "fire" it used to. Could that be the lack of coolant? Will an engine generally run cooler, or hotter with no antifreeze, and only tap water? Thanks.

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post #2 of 9 (permalink) Old May 8th, 07, 11:23 AM
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Re: Straight water ok???

straight water for any length of time is a bad idea. coolant has some anti corrosive qualities to keep yor system cleaner. also a 50/50 mix has a higher boiling point. water boils at 212F at sea level.for every pound psi of pressure the boiling point raises 3F. so a 15lb cap will raise the boiling point of the coolant system 45F. so a good cap is very crutial.

as for your heater being not so good.
try flushing out your system......

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post #3 of 9 (permalink) Old May 8th, 07, 11:31 AM
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Re: Straight water ok???

Don't run straight water particularly if you have an aluminum radiator. As wagonman stated the coolant has rust and corrosive inhibitors. The inhibitors are a must with the aluminum radiator.

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post #4 of 9 (permalink) Old May 8th, 07, 11:48 AM
 
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Re: Straight water ok???

you should never run tap water - mix or otherwise (to many chemicals - chlorine/fluoride...etc) always use distilled water if possible. if the engine is not to be used in the cold months then it would be recommended to run all distilled water and an additive like waterwetter or royalpurple (they supply the lubricant and anticorrosive props needed). the only stip is if you don't have a heated storage space in the winter youll want to drain off about 1/2 and top w/ regular AF so it doesnt freeze during storage.
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post #5 of 9 (permalink) Old May 8th, 07, 12:07 PM
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Re: Straight water ok???

It is okay if you are flushing out the system and you plan on draining and then adding a 50/50 water and coolant mixture right away. After you flush the radiator, you should always run with coolant mixture instead of straight water because of the rust factor and also coolant raises the boiling temperature of the water as stated above. Also, the engine will run cooler initially with straight water and that is why the heater is blowing cooler than usual.

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Last edited by Camaro Dave; May 8th, 07 at 09:50 PM.
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post #6 of 9 (permalink) Old May 9th, 07, 04:49 AM
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Re: Straight water ok???

Quote:
Originally Posted by Camaro Dave View Post
It is okay if you are flushing out the system and you plan on draining and then adding a 50/50 water and coolant mixture right away. After you flush the radiator, you should always run with coolant mixture instead of straight water because of the rust factor and also coolant raises the boiling temperature of the water as stated above. Also, the engine will run cooler initially with straight water and that is why the heater is blowing cooler than usual.
Exactly ! Your car could even run diferent. Water exchages heat much easier than mix. Change it before you do much else, using distiled is a great idea. Rust is having a feild day inside without the chemicals in the antifreeze.
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post #7 of 9 (permalink) Old May 11th, 07, 12:21 PM
 
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Re: Straight water ok???

Yeah, don't use tap water. Go to a grocery store and buy distilled water.
Tap water varies in mineral content from area to area. Distilled water is cheap.

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post #8 of 9 (permalink) Old May 11th, 07, 01:29 PM
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Re: Straight water ok???

There is Distilled and deionised...dont confuse the 2..
Both are fine deionised is far cheaper.
Run a check on your local water supply..the local gov should have daily QC figures for your water...
Where we are in NZ the water is clean enough to use even for batteries.
If you have a swimming pool or spa pool, knowing this makes getting the water right easy..

When flushing raditors , dont use inhibitors, only add when the final fresh water is put in....runing straight water for sort periods,once in a while days or even a week will not cause any problem.

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post #9 of 9 (permalink) Old May 11th, 07, 01:32 PM
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Re: Straight water ok???

Antifreeze also lubricates the water pump seal. Waterwetter would do the same.

Matt

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