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Old 07-14-2023, 02:45 PM   #1
networx2002
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What coolant should I use?

Hello everybody

I'm looking to do a coolant flush in my 1966 C10 with a 305 engine.
I'm not sure what coolant is in there now so I'm going to flush it out, what type should I use to replace the existing coolant?
Thanks

Last edited by networx2002; 07-14-2023 at 03:04 PM.
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Old 07-14-2023, 03:30 PM   #2
forestb
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Re: What coolant should I use?

I'm in Cali also and I have always used Prestone 50/50 and have never had a problem. If you decide to dilute it with water you will want to use distilled water.
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Old 07-14-2023, 04:21 PM   #3
networx2002
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Re: What coolant should I use?

I plan on doing a concentrate and adding to Stillwater I just not sure what kind of coolant to purchase
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Old 07-14-2023, 09:19 PM   #4
Chevy nutcase
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Re: What coolant should I use?

Quote:
Originally Posted by networx2002 View Post
I plan on doing a concentrate and adding to Stillwater I just not sure what kind of coolant to purchase
Cheap regular Prestone is fine.
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Old 07-15-2023, 09:35 PM   #5
cwcarpenter98
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Re: What coolant should I use?

The green stuff is what I use, haven't had any issues with it
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1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive
Overdrive wiring here
1963-ish truck bed trailer - Half-Wit

1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed

1995 Dodge Dakota Sport

"I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson
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Old 07-15-2023, 10:28 PM   #6
networx2002
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Re: What coolant should I use?

I just picked up some green concentrate handsome distilled water. Thanks for the feedback
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