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Drained radiator, only a gallon came out?

 
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LordJezo
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PostPosted: Sat Oct 05, 2013 6:04 pm    Post subject:  Drained radiator, only a gallon came out? Reply with quote

The car is supposed to hold 4 gallons right?

When I drained it only a gallon came out, when we filled it back to the cool line only a gallon went in.

Am I missing something here in order to get a full drain?

I didn't flush it this time, is that it? I just wanted to drain it and fill it.
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PostPosted: Sat Oct 05, 2013 6:42 pm    Post subject:   Reply with quote

It depends on where you drain it from. I only got about a gallon and a half to drain out of my car when I used the ****** on the bottom of the radiator. You'll probably get more if you pull a hose from the bottom.

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LordJezo
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PostPosted: Sat Oct 05, 2013 8:09 pm    Post subject:   Reply with quote

Thats how I drained mine, same way you did.

So should I drain it a couple more times after driving around for a few days so I can eventually have all new stuff in there?
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lostwrench
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PostPosted: Sat Oct 05, 2013 8:35 pm    Post subject:   Reply with quote

Remove the radiator cap, reservoir cap, and the air bleed screws.
Don't drop the air bleed screws, bad language will ensue.
Open the drain plug at the bottom of the radiator.
Remove the lower radiator hose so the remaining coolant in the upper engine block will drain.
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Bill58
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PostPosted: Sun Oct 06, 2013 10:51 am    Post subject:   Reply with quote

Total capacity is <3 gallons. The block, heater core, overflow tank and hoses will retain coolant after a radiator only drain.
Service manual- "If a complete engine block drain is required LA1 engine, remove the engine block drain plugs.
If a complete engine block drain is required L36 or L67 engine, remove the knock sensors. Refer to Knock Sensor 1 Replacement and Knock Sensor 2 Replacement in Engine Controls - 3.8L (L36 and L67)."
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PostPosted: Sun Oct 06, 2013 11:36 am    Post subject:   Reply with quote

For years I used the flush kit sold by Prestone. [Still see them at Walmart] They attach on the heater hose, & your garden hose attaches to that. You start the engine to get it warm, & then turn it off. Start the garden hose, & 100% of the coolant in the engine is flushed out. You keep the heater on to get the coolant out of the heater core. The old coolant will exit through the radiator filler neck, & will soon run clear meaning all the old coolant is gone, & only clean water is in the system. You now drain what you can, & add coolant to get a 50/50 ratio. Still the best way, & the Prestone kit is only a few bucks. GARY

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PostPosted: Sun Oct 06, 2013 10:59 pm    Post subject:   Reply with quote

Definitely do not deliberately drive the vehicle with that much coolant missing - if an air pocket can't escape the motor, things will get warped quickly, especially the plastic upper intake manifold on the L36.

I'd suggest the Prestone kit as recommended by the post above mine.

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PostPosted: Mon Oct 07, 2013 11:45 am    Post subject:   Reply with quote

9C3 wrote:
For years I used the flush kit sold by Prestone. [Still see them at Walmart] They attach on the heater hose, & your garden hose attaches to that. You start the engine to get it warm, & then turn it off. Start the garden hose, & 100% of the coolant in the engine is flushed out. You keep the heater on to get the coolant out of the heater core. The old coolant will exit through the radiator filler neck, & will soon run clear meaning all the old coolant is gone, & only clean water is in the system. You now drain what you can, & add coolant to get a 50/50 ratio. Still the best way, & the Prestone kit is only a few bucks. GARY


Having it run clear could I take the hoses off then and dump all the rest of the water out and fill it up with premixed coolant?
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PostPosted: Mon Oct 07, 2013 12:13 pm    Post subject:   Reply with quote

LordJezo wrote:
9C3 wrote:
For years I used the flush kit sold by Prestone. [Still see them at Walmart] They attach on the heater hose, & your garden hose attaches to that. You start the engine to get it warm, & then turn it off. Start the garden hose, & 100% of the coolant in the engine is flushed out. You keep the heater on to get the coolant out of the heater core. The old coolant will exit through the radiator filler neck, & will soon run clear meaning all the old coolant is gone, & only clean water is in the system. You now drain what you can, & add coolant to get a 50/50 ratio. Still the best way, & the Prestone kit is only a few bucks. GARY


Having it run clear could I take the hoses off then and dump all the rest of the water out and fill it up with premixed coolant?


No, only with pure coolant. Premixed is already 50% water, so adding that to a system that is half full of water will give you roughly 75% water and 25% coolant, which will freeze in winter and be much more prone to boiling (overheating) during summer. If you can fully , completely drain the system then premixed is fine.

I recommend using an antifreeze tester (pretty cheap, available anywhere automotive stuff is sold), to make sure your mix is good once you've filled the system back up.

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LordJezo
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PostPosted: Tue Oct 08, 2013 1:45 pm    Post subject:   Reply with quote

Lingenfelter wrote:


No, only with pure coolant. Premixed is already 50% water, so adding that to a system that is half full of water will give you roughly 75% water and 25% coolant, which will freeze in winter and be much more prone to boiling (overheating) during summer. If you can fully , completely drain the system then premixed is fine.

I recommend using an antifreeze tester (pretty cheap, available anywhere automotive stuff is sold), to make sure your mix is good once you've filled the system back up.


So a full drain really isnt a full drain, even if I unhook the hoses and the drain plug?
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PostPosted: Tue Oct 08, 2013 2:06 pm    Post subject:   Reply with quote

LordJezo wrote:


So a full drain really isnt a full drain, even if I unhook the hoses and the drain plug?
Correct. There will always be some hiding somewhere. Which is why if you just drain, & add fresh coolant/water, some of the old coolant will stay, & get mixed with the new. This is why a flush is recommended, so whatever stays in the engine will be clean water. GARY

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