Distilled vs de-ionzed water

Maintenance advice to keep your Spider in shape.
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AriK
Patron 2018
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Joined: Sat Apr 02, 2011 7:58 pm
Your car is a: 1979 Fiat Spider
Location: Montreal Canada

Distilled vs de-ionzed water

Post by AriK »

Time for a coolant flush. The local auto parts only sells de-ionized water. Opinions online (not here) are all over the map. Does it really make a difference?
Also, does mixing two brands of green coolant (bits leftover in my garage) really a no-no? Most of it would be Prestone, the final parts, bleeding process, topping up, etc. would be STP.
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Last edited by AriK on Sun Feb 04, 2018 5:36 pm, edited 1 time in total.
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rjkoop
Posts: 976
Joined: Thu Nov 08, 2012 6:45 am
Your car is a: 1981 Fiat Spider
Location: Ottawa, Ontario, Canada

Re: Distilled vs de-ionzed water

Post by rjkoop »

AriK wrote:Time for a coolant flush. The local auto parts only sells de-ionized water. Opinions online (not here) are all over the map. Does it really make a difference?
Also, does mixing two brands of green coolant (bits leftover in my garage) really a no-no? Most of it would be Prestone, the final parts, bleeding process, topping up, etc. would be STP.
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Personally for the minimal cost I wouldn't mix 2 types of coolant but what do I know... :?

I bought deionized water from Loblaws but I think Cdn Tire has it as well.

Richard
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aj81spider
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Your car is a: 1974 Fiat 124 Spider
Location: Chelmsford, MA

Re: Distilled vs de-ionzed water

Post by aj81spider »

My local supermarket sells distilled water. You might check there.
A.J.

1974 Fiat 124 Spider
2006 Corvette
1981 Spider 2000 (sold 2013 - never should have sold that car)
vandor
Posts: 3996
Joined: Sat May 23, 2009 1:23 pm
Your car is a: 1971 124 Spider
Location: Texas, USA

Re: Distilled vs de-ionzed water

Post by vandor »

I've mixed green coolants many times without any issues.
Csaba
'71 124 Spider, much modified
'17 124 Abarth, silver
http://italiancarclub.com/csaba/
Co-owner of the best dang Fiat parts place in town
DieselSpider
Posts: 2130
Joined: Wed Dec 24, 2014 10:21 pm
Your car is a: 1978 124 Spider with Isuzu Turbo Diesel

Re: Distilled vs de-ionzed water

Post by DieselSpider »

Bigger issue to me is how long has the coolant on which the seal has been broken been sitting on the shelf.

Always start off after a coolant flush with fresh and new is how I look at it.
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