Coolant for C20 w/ 350

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,439
Reaction score
28,345
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
No, Illinois.

Yeah, I was asking about Illinois. The only reason I ask is because whenever I've worked in that area, a lot of things that are easy to find in most other places, it's harder to find.
 

legopnuematic

Licensed Junk Dealer
Supporting Member
Joined
Oct 27, 2016
Posts
2,506
Reaction score
6,482
Location
MO
First Name
Spencer
Truck Year
1971, 1̶9̶7̶4, 1976, 1979,1̶9̶8̶5, 2002
Truck Model
Dart Swinger, Sierra 10, C10 Cheyenne, C10 Big Ten, Silverado 10, Ram 2500
Engine Size
225/6, 350 c.i., 350 c.i., 5.9l Cummins
I buy my green antifreeze from farm supply stores. Durex branded. Seems to work good and is cheap.

Sent from my Moto Z (2) using Tapatalk
 

Rusty Nail

Full Access Member
Joined
Jan 29, 2015
Posts
10,041
Reaction score
10,133
Location
the other side of the internet
First Name
Rusty
Truck Year
1977
Truck Model
C20
Engine Size
350sbc
The reason it was hard to find conventional green is because nobody uses it anymore. The "all makes, all models" stuff is the hot ticket for simplicity.

I have just recently decided I will make the switch from GREEN to YELLOW...but I haven't actually done it yet.
I'm nervous.
Only because I don't trust it. Nevermind. I ain't switchin for nothin.
Look at the crap junk garbage they put that **** in!
Not my in junk, NO SIR!


xc_hide_links_from_guests_guests_error_hide_media

Next thing you know they'll be sellin a rounder tire or a better way to toast bread.
You guys buy it! Maybe it'll look good in your vortex..that's way better than some old SBC...
Just sayin lol. Here's your soapbox back, my bad.
 
Last edited:

Frankenchevy

Proverbs 16:18
Joined
Jan 3, 2018
Posts
6,082
Reaction score
7,756
Location
USA
First Name
Jeremy
Truck Year
Square
Truck Model
CUCV
Engine Size
Small
Lol

Wut
 

Arkansas_V8

Proud Redneck
Joined
Jul 1, 2019
Posts
3,022
Reaction score
3,963
Location
Springdale, Arkansas
First Name
Brent
Truck Year
88
Truck Model
V20 Suburban
Engine Size
5.7
Local Walmart Carries the 100% green, and tractor supply, as well as Atwoods both carry it.

Like I always say, we are mostly rednecks, so we dont trust no yellow or red or any other color. Lol
 

SquareRoot

Full Access Member
Joined
Mar 18, 2017
Posts
4,192
Reaction score
8,030
Location
Arizona
First Name
Mike
Truck Year
85
Truck Model
K20
Engine Size
350
Like I always say, we are mostly rednecks, so we dont trust no yellow or red or any other color. Lol

Such a confusing statement. So can a redneck be trusted or not?
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,439
Reaction score
28,345
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
It varies from brand to brand, but most of the "all makes" coolant is a green color.
 

Arkansas_V8

Proud Redneck
Joined
Jul 1, 2019
Posts
3,022
Reaction score
3,963
Location
Springdale, Arkansas
First Name
Brent
Truck Year
88
Truck Model
V20 Suburban
Engine Size
5.7
Such a confusing statement. So can a redneck be trusted or not?

If we give you our word, shake your hand. It's a bond taken seriously.

Alot of us are behind the times is what I ment. Lol, I am way behind the times.
 

Chevyguy

Full Access Member
Joined
Sep 10, 2012
Posts
186
Reaction score
60
Location
Eugene,OR
First Name
Clayton
Truck Year
1987
Truck Model
V20
Engine Size
5.7 Litre
There's no inspection in Ohio either. Some parts stores tend to stock different things. Even the rusty junk driving around often came new with specialized coolant. GM started with DexCool around '95, Ford had some yellow stuff by '00 or so and it all snowballed from there.
DexCool is crap. Use the inexpensive green coolant and replace it every two years. The electrical current running through our trucks breaks down the coolants protective additives over time. I have seen alot of cooling system failures due to DexCool 5 year coolant.

Clayton

Sent from my LM-V350 using Tapatalk
 

Chevyguy

Full Access Member
Joined
Sep 10, 2012
Posts
186
Reaction score
60
Location
Eugene,OR
First Name
Clayton
Truck Year
1987
Truck Model
V20
Engine Size
5.7 Litre
Well I guess I don't know why the parts stores around her mostly stock the green stuff then.
The green stuff works just as well. Just change it out every two years. You can run it in the newer cars. The older brass and copper radiators don't get along well with the Dexcool. The newer cars run aluminum and plastic in their cooling systems. I just put an aluminum heater core in my 87 V-20 and it seems to work fine with the green coolant.

Clayton

Sent from my LM-V350 using Tapatalk
 

Chevyguy

Full Access Member
Joined
Sep 10, 2012
Posts
186
Reaction score
60
Location
Eugene,OR
First Name
Clayton
Truck Year
1987
Truck Model
V20
Engine Size
5.7 Litre
I buy my green antifreeze from farm supply stores. Durex branded. Seems to work good and is cheap.

Sent from my Moto Z (2) using Tapatalk
Prestone makes it.

Clayton

Sent from my LM-V350 using Tapatalk
 

Chevyguy

Full Access Member
Joined
Sep 10, 2012
Posts
186
Reaction score
60
Location
Eugene,OR
First Name
Clayton
Truck Year
1987
Truck Model
V20
Engine Size
5.7 Litre
I have just recently decided I will make the switch from GREEN to YELLOW...but I haven't actually done it yet.
I'm nervous.
Only because I don't trust it. Nevermind. I ain't switchin for nothin.
Look at the crap junk garbage they put that **** in!
Not my in junk, NO SIR!


xc_hide_links_from_guests_guests_error_hide_media

Next thing you know they'll be sellin a rounder tire or a better way to toast bread.
You guys buy it! Maybe it'll look good in your vortex..that's way better than some old SBC...
Just sayin lol. Here's your soapbox back, my bad.
Don't waste your money, keep running the green stuff. To help out your water pump you can even add a water pump lube if you want to.

Clayton

Sent from my LM-V350 using Tapatalk
 

bucket

Super Moderator
Staff member
Super Moderator
Joined
Aug 3, 2010
Posts
30,439
Reaction score
28,345
Location
Usually not in Ohio
First Name
Andy
Truck Year
'77, '78, '79, '84, '88
Truck Model
K5 thru K30
Engine Size
350-454
That's where it can be confusing. Most brands of the universal type coolant are a green color. When it's in the truck, you'll never know it because it looks green just like the regular old "green" coolant.
 

SirRobyn0

Full Access Member
Joined
Dec 6, 2019
Posts
6,755
Reaction score
11,402
Location
In the woods in Western Washington
First Name
Rob
Truck Year
1984
Truck Model
C20
Engine Size
305
You could run most types of coolant in these old trucks if you choose too. However, the traditional green coolant was formulated for rigs like ours, most importantly the brass radiator, and brass heater core. My second choice would be a global or universal coolant which is generally a gold color. If it were me even if I had a long life coolant, I'd still change it / flush it on a regular basis, because those long life additives aren't formulated for our older rigs. The one thing I would never ever pour in my radiator is dexcool. The redish stuff made for the newer GM vehicles. dexcool is known for plugging up radiators and heater cores in any system that isn't perfect. Even in newer GM vehicles that call for Dexcool, at the shop we like to flush them to global, gold fluid when they are serviced. So for me, it's green!
 

Snoots

Full Access Member
Joined
Jan 23, 2013
Posts
8,750
Reaction score
18,191
Location
Georgia
First Name
Roger
Truck Year
1973
Truck Model
Jimmy Sierra
Engine Size
350 w/203
Green works great. Automakers like the gold stuff 'cause it sells parts.
 

Latest posts

Forum statistics

Threads
44,163
Posts
950,653
Members
36,276
Latest member
2manysquares2care
Top