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 Post subject: COOLANT FLUSH
PostPosted: Tue Apr 13, 2010 2:34 am 
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I am merely driving my van
I am merely driving my van

Joined: Fri Apr 09, 2010 3:16 pm
Posts: 3
HI, I'M A NEWBY TO THE FORUM AND WANTED SOME HELP ON FLUSHING MY COOLANT ON 2002 ASTRO, I CAN'T FIGURE OUT WHAT HEATER HOSE IS THE INLET OR OUTLET, PLEASE HELP.

PETER


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 Post subject: Re: COOLANT FLUSH
PostPosted: Tue Apr 13, 2010 2:42 am 
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Hi Peter........Welcome to the site. It doesn't really matter which one you use. Either one will flush the engine. Remove the lower radiator hose and let the water run until it comes out clear.

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1996 Safari SLX Hotair balloon transport vehicle


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 Post subject: Re: COOLANT FLUSH
PostPosted: Tue Apr 13, 2010 2:50 am 
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I am merely driving my van
I am merely driving my van

Joined: Fri Apr 09, 2010 3:16 pm
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THANKS FOR THE FAST RESPONSE, I WANTED TO USE A PRESTONE FLUSH KIT AND IT SPECIFIES WHAT HEATER HOSE TO TAP, ALSO WHILE I'M ON IT WHAT COOLANT CAN YOU RECOMMEND. 2002 ASTRO

PETE


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 Post subject: Re: COOLANT FLUSH
PostPosted: Tue Apr 13, 2010 3:01 am 
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I sleep in my van

Joined: Fri Sep 22, 2006 1:35 am
Posts: 918
Welcome Peter!

Please lose the caps lock.

IIRC, the inlet hose is the one that hooks to the intake manifold, and the return hooks to the pump on the suction side. I hope I have that right.

If you run the heater on a cold engine, you can feel the hotter hose as the engine warms, that is the inlet.

This is how I did mine, it is the only really good way if your van had Dexcool in it, IMHO. viewtopic.php?f=6&t=5199&start=0


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 Post subject: Re: COOLANT FLUSH
PostPosted: Tue Apr 13, 2010 8:22 pm 
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Location: Billings, MT, 'MERICA!
PLEASE don't use a Prestone Flush Kit. Cutting a line gives you one more place for a leak and the cold water from the household water supply will cause the t-stat to stay shut.

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92 Safari SLE w/Z Motor (sold to a good home)
98 AWD Stro LS
93 Suburban Silverado 4x4

Look for the MISSING Alien in the Right Seat. AL, PHONE HOME!!!

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 Post subject: Re: COOLANT FLUSH
PostPosted: Tue Apr 13, 2010 8:48 pm 
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Location: Mission Viejo, CA
Hey, welcome to the forum! Great people here with lot's of help. I agree, scrap the flush kit.
Just unhook each hose and jam a garden hose in and blast away, works great. If you really want to flush the whole system, unhook any and every hose and flush both forward and back. I think you'll find this cheap, easy and effective. Doing it even just once should last a long time before any need of it again.

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1998 Astro, 187,000 miles

K&N air filter
TruCool trans cooler & temp gauge
2" Overland lift & 16" BFG Terrain/aluminum rims, 3.73 gears
JET Performance SCU-2000 (Speed Control Unit)
Edelbrock shocks, rear AirLift bags & sway bar
iPOD, CD, DVD, Dutch door mounted 12s, 400w
Draw-Tite Dual Port Hitch System, hitch-mounted bike rack (4), hitch-mounted cargo tray, Thule roof-mounted cargo box


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 Post subject: Re: COOLANT FLUSH
PostPosted: Wed Apr 14, 2010 1:52 am 
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I am merely driving my van
I am merely driving my van

Joined: Fri Apr 09, 2010 3:16 pm
Posts: 3
Thanks a lot, I will let you know how I make out.

Pete, 02 Astro


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 Post subject: Re: COOLANT FLUSH
PostPosted: Wed Apr 14, 2010 10:37 am 
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CaptSquid wrote:
the cold water from the household water supply will cause the t-stat to stay shut.

stupid question perhaps.... can you pull the stat and then flush it with cold water? .. or when run, if the cold water warms up anyway .. wouldn't the stat open? :-k

curious

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Rob Image

current rides:
04 Mazda 6 V6 5spd

vans owned: Image
97 Astro AWD (selling by summer .. i think) SOLD
99 Astro LS Sept 08 ASV VOM
94 Astro LT
93 Astro LT
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 Post subject: Re: COOLANT FLUSH
PostPosted: Wed Apr 14, 2010 12:13 pm 
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The Capt. is correct. Cold water will keep the t-stat closed. However, if you flush through one of the heater hoses the t-stat will not affect the flush provided the heater hoses are connected to the manifold and water pump. In order to flush the radiator you will have to remove the radiator hoses.

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1996 Safari SLX Hotair balloon transport vehicle


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 Post subject: Re: COOLANT FLUSH
PostPosted: Wed Apr 14, 2010 3:06 pm 
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I sleep in my van
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Location: Mission Viejo, CA
If you're doing the flush, this would be a good time to spend $5 and replace the stat anyway, good insurance.

_________________
1998 Astro, 187,000 miles

K&N air filter
TruCool trans cooler & temp gauge
2" Overland lift & 16" BFG Terrain/aluminum rims, 3.73 gears
JET Performance SCU-2000 (Speed Control Unit)
Edelbrock shocks, rear AirLift bags & sway bar
iPOD, CD, DVD, Dutch door mounted 12s, 400w
Draw-Tite Dual Port Hitch System, hitch-mounted bike rack (4), hitch-mounted cargo tray, Thule roof-mounted cargo box


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 Post subject: Re: COOLANT FLUSH
PostPosted: Thu Apr 15, 2010 3:11 am 
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LaGrasta wrote:
If you're doing the flush, this would be a good time to spend $5 and replace the stat anyway, good insurance.


+1

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'89 Astro, 4.3L, TBI. Minor intake and exhaust mods. Rebuilt 700R4 trans (by me). Corvette servo, 0.5" boost valve, police grade 1-2 accumulator spring (shifts fast and solid). B&M stacked plate trans cooler. Bilstein shocks. Belltech sway bars front and back. New head unit, speakers and subwoofer. Needs paint and a new headliner.

name's Steve
I can't remember all I've forgotten about that....


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 Post subject: Re: COOLANT FLUSH
PostPosted: Thu Apr 15, 2010 1:28 pm 
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Location: Billings, MT, 'MERICA!
crash wrote:
CaptSquid wrote:
the cold water from the household water supply will cause the t-stat to stay shut.

stupid question perhaps.... can you pull the stat and then flush it with cold water? .. or when run, if the cold water warms up anyway .. wouldn't the stat open? :-k

curious

Sorry, crash, but the water flowing through the engine isn't in there long enough to get warm. I did that on a 77 DJ5 and only managed to flush part of the system. It NEVER got warm.

I went to the hardware store and got the metal hose ends and a few worm clamps. I kept them in my tools until I got rid of the old girl (the N. Charleston PD took her away because they CLAIMED I was parked illegally. They hated sailors.)

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Mike, Billings, MT, 'MERICA!
92 Safari SLE w/Z Motor (sold to a good home)
98 AWD Stro LS
93 Suburban Silverado 4x4

Look for the MISSING Alien in the Right Seat. AL, PHONE HOME!!!

ImageImage
Image


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 Post subject: Re: COOLANT FLUSH
PostPosted: Wed Dec 29, 2010 3:48 am 
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I finally get the smurf thing

Joined: Wed Dec 29, 2010 12:06 am
Posts: 145
FYI-be careful about putting 40 degree water into a 150 degree engine. Sometimes physics wins.


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 Post subject: Re: COOLANT FLUSH
PostPosted: Wed Dec 29, 2010 12:44 pm 
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That sounds SCARY :yikes: . Care to share the details?

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1996 Safari SLX Hotair balloon transport vehicle


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