Fark Me, Shop Put Green Stuff in the Dexcool...

Fark Me, Shop Put Green Stuff in the Dexcool...

Postby iLikeToAstroSafari [OP] » May 22nd 2020, 2:23pm

Been slacking in my other thread, crazy busy and been meaning to post pics, and will.

Long story short picked up a '98 AWD.

Did not know these vans use dexcool...

Reservoir had fresh bright green stuff in it during inspection.

Seller "serviced" vehicle before sale at a shop.

Please guide me on how to properly flush all this crap out on these vans, hopefully not too much damage was done.

Vehicle towed home, but idled in sellers driveway for 1+ hour (diagnosing gauge/heater).

Put MAYBE 10km on her since.

Orange leak from bottom of van when at home idling for 5 minutes. No leak when in sellers driveway.

Opened rad cap, SURPRISE! Dexcool.

My first step is to remove all the dexcool and flush the coolant passages best I can, yes, even with my leak. I want this devil of a fluid out of the van.

I have ramps, pressure tester, drain pans, access to de-ionized water, and almost every automotive tool known to man, or a doohickey equivelant.

But, all vehicles have their quirks and these vans are new to me. Astro Safarians, please guide me on the best way to get this horrible horrible stuff out.

Plan is to put the good ol' Prestone green stuff in it, unless there is something that works better for the Vortec 4.3s? Dexcool is NOT going back in.

I pray the leak is from a cracked rad or hose, and I am not a praying man.

Please cross your fingers (and toes) for me.
Last edited by iLikeToAstroSafari on May 22nd 2020, 3:57pm, edited 1 time in total.
Original Poster [OP]
iLikeToAstroSafari
Fueling (Empty tank)
Fueling (Empty tank)
Posts: 6
Topics: 4
Joined: May 2020
Alias (AKA):
Van Model Year: 1998
Van Make/Model: Chevrolet Astro
Extra Info: LT AWD

  • Similar topics
    Replies
    Views
    Author
  • Let's Look at My Spider and Intake Stuff
    by Sparkydog » September 29th 2020, 3:36pm in Engines
    5 Replies
    219 Views
    Last post by Leeann_93 View the latest post
    September 30th 2020, 10:52pm
  •  
    10
    71
    Last post by AstroSafari.com View the latest post
    October 29th 2020, 5:02pm

Re: Fark Me, Shop Put Green Stuff in the Dexcool...

Postby markmitch » May 22nd 2020, 2:34pm

dexcool is orange and is junk green stuff is ethylene glycol and is good stuff. drain coolant into bucket then leaving radiator petcock open stick a garden hose into the radiator neck turn the hose on slow start the engine and let it flush. If you think it needs more flush then that then close pet cock get a gallon jug of water dump a bit out then add 1 cup of cascade dish washer powder add to gallon let it sit in the sun to warm up shake it good to mix then dump into radiator. start engine let it run for about an hour let cool then open radiator to flush again do the hose thing again to flush it real good. fill with appropriate fluids, I use 50/50 because it really does not get to freezing here in NorCal. You want the green stuff not the orange stuff.
User avatar
markmitch
AstroSafari Pioneer
AstroSafari Pioneer
Firing on 5 Cylinders (L6)
Firing on 5 Cylinders (L6)
Years of Membership: markmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full yearsmarkmitch has been a member for 12 full years
Posts: 5576
Topics: 608
Images: 20
Joined: March 2008
Location: California
Gender: Male
Alias (AKA): AstroMark or 1st gen
Van Model Year: 1989
Van Make/Model: Chevrolet Astro
Extra Info: RS V8

Re: Fark Me, Shop Put Green Stuff in the Dexcool...

Postby Wiley » May 22nd 2020, 2:56pm

Also note you may not have a radiator petcock, in that case you just remove the hoses, it's a little messy.

Having the sludge myself, My green/orange issue started 10 years ago, and I took the van on a two year trip after the mixing of coolants, so it is not the end of the world. That said, I would even go a step further from markmitch's suggestion and remove each hose and blast water into every orifice to clean as much out as you can. I personally don't mind using a garden hose to do this, and running distilled water through later, but you may not want to use tap water at all, just my opinion.

Since this probably happened recently, I recommend you get under the van and open the engine block drain plugs. There are two, they are SAE size 9/16, and probably tough to get to, I have a lift, and some parts out so it was easy. When I removed the plugs, NOTHING came out, I had to take a pick in there are open it up so water now flows freely out of them.

The opening of the engine block was last week so maybe it would have been cleared originally if I had opened those and flushed years ago, which is why I suggest getting in there despite the difficulty. To get to the one on the passenger side you most likely have to remove the starter, I believe you can get around the front drive shaft and oil cooler lines when doing the drivers side, but again not sure. Not incredibly difficult but you may end up going down the rabbit hole deeper than you planned.
Attachments
IMG_20200522_075817056.jpg
Engine Block Drain Plug
IMG_20200522_075725988.jpg
Passenger side plug removed
IMG_20200522_075905223.jpg
Drivers side plug removed
Last edited by Wiley on May 22nd 2020, 4:17pm, edited 3 times in total.
2guys1truck.com: 2004 AWD Chevy Astro from California to Colombia!
User avatar
Wiley
Firing on 2 Cylinders (L1)
Firing on 2 Cylinders (L1)
Years of Membership: Wiley has been a member for 6 full yearsWiley has been a member for 6 full yearsWiley has been a member for 6 full yearsWiley has been a member for 6 full yearsWiley has been a member for 6 full yearsWiley has been a member for 6 full years
Posts: 239
Topics: 7
Joined: February 2014
Gender: Male
Alias (AKA):
Van Model Year: 2004
Van Make/Model: Chevrolet Astro
Extra Info: AWD 2 inch Lift

Re: Fark Me, Shop Put Green Stuff in the Dexcool...

Postby MechBob » May 22nd 2020, 3:37pm

Well, as the older "bad" green stuff was eliminated many years ago, and almost all coolant is all models,all makes, and is also OAT, your fears are probably unfounded. The color of it is meaningless, nowadays. Personally, I would never pay the price for dex, I use universal.
User avatar
MechBob
Firing on 1 Cylinder (L2)
Firing on 1 Cylinder (L2)
Years of Membership: MechBob has been a member for 2 full yearsMechBob has been a member for 2 full years
Posts: 1146
Topics: 11
Images: 12
Joined: August 2018
Gender: Male
Alias (AKA): Bob
Van Model Year: 1994
Van Make/Model: Chevrolet Astro
Extra Info: 4x4

Re: Fark Me, Shop Put Green Stuff in the Dexcool...

Postby Leeann_93 » May 22nd 2020, 3:48pm

All of my vans through '02 have a radiator petcock, but my '05 does not. And it is a factory radiator. Pulling the lower radiator hose speeds emptying both the radiator and block but, as Wiley said, it is a bit messy.

There are block drains as well; pipe plugs on both banks. Pull those and the lower radiator hose. You might need to poke something into the block drain holes to break up the crusty crap to let things drain. Once it stops pouring out, put plain water in the radiator until it runs clear. Pull the upper rad hose and remove the thermostat neck and thermostat, and pour plain water in there until it runs clear out of the block drains.

If it's no longer getting below freezing up there, you can fill with water and drive it around for a week or so, then drain everything again and fill properly with green and distilled water.

If you don't see any signs of sludge or sand on the cap or down the neck, it probably isn't a problem. Most coolants, as Bob mentioned, are now OAT. Just don't get Xerex Gold as that is HOAT and incompatible (it's for Chrysler vehicles - I have it for my Jeep). The original DexCool was a problem, but part of that problem was the plastic gaskets GM used - that version ate plastic. The reformulated DexCool is much improved. I just don't like paying extra for something because of a name.
'05 Astro AWD vin X
'02 Astro LS AWD vin X
'00 Astro LS AWD - WIP
'99 Safari XLE AWD - broke
'93 AWD EXT vin W - real broke
User avatar
Leeann_93
Team Leader
Team Leader
Firing on 8 Cylinders (L7)
Firing on 8 Cylinders (L7)
Years of Membership: Leeann_93 has been a member for 11 full yearsLeeann_93 has been a member for 11 full yearsLeeann_93 has been a member for 11 full yearsLeeann_93 has been a member for 11 full yearsLeeann_93 has been a member for 11 full yearsLeeann_93 has been a member for 11 full yearsLeeann_93 has been a member for 11 full yearsLeeann_93 has been a member for 11 full yearsLeeann_93 has been a member for 11 full yearsLeeann_93 has been a member for 11 full yearsLeeann_93 has been a member for 11 full years
Posts: 13509
Topics: 44
Images: 17
Joined: December 2008
Location: MD
Gender: Female
Alias (AKA):
Van Model Year: 2005
Van Make/Model: Chevrolet Astro
Extra Info: LS AWD


 
  • Related topics
    Replies
    Views
    Last post

Return to Engines

It is currently October 29th 2020, 5:02pm

Engines Forum
Engine Repairs, Modifications, Diagnostics, Tuning, Upgrading, Questions.

<a href="https://ad.doubleclick.net/ddm/trackclk/N8334.275400VERTICALSCOPEINC./B20209277.204028354;dc_trk_aid=407011718;dc_trk_cid=94070067;dc_lat=;dc_rdid=;tag_for_child_directed_treatment="target="_blank"><img src="https://tpc.googlesyndication.com/pagead/imgad?id=CICAgKDrrqWwMRCAARgcKAEyCN4sAjjtai4k" border="0" align="right">
<IMG SRC="https://ad.doubleclick.net/ddm/trackimp/N8334.275400VERTICALSCOPEINC./B20209277.204028354;dc_trk_aid=407011718;dc_trk_cid=94070067;ord=;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=?" BORDER="0" HEIGHT="1" WIDTH="1" ALT="Advertisement">
Moderator: chevy57bert
To create a new topic in Engines, click this button:
Previous topic Next topic
Recent Image Attachments
Attached by:
Buzman63
in Engines
Views: 72
Comments: 3
Date: Today
Time: 2:06pm
» Read last comment
Attached by:
kade225
in Engines
Views: 54
Comments: 1
Date: Yesterday
Time: 11:27pm
» Read last comment
Attached by:
djpigs
in Engines
Views: 397
Comments: 16
Date: Oct 27 '20
Time: 10:01pm
» Read last comment
Attached by:
AstroTan
in Engines
Views: 201
Comments: 5
Date: Oct 21 '20
Time: 8:02pm
» Read last comment
Attached by:
Attached by: Sparkydog
Sparkydog
in Engines
Views: 352
Comments: 13
Date: Oct 20 '20
Time: 4:01pm
» Read last comment
Sponsors

Who is online

Users browsing this forum: No registered users and 27 guests