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Old 10-18-2011, 09:19 AM   #1
bk63
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Default Flushing 4 cyl radiator

100k, 04 need to flush before winter. Finally got all the hoses, had to special order a lot of them, highway robbery. I figure after 7 years, replace all the hoses. Book says remove the pipe and take out the thermostat but just wondering who has flushed their radiator and what did you do. I don't think I'm going to remove the thermostat. More like run it clear and then drain, replace the hoses and refill.

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Old 10-18-2011, 01:25 PM   #2
DavidBo
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Default Re: Flushing 4 cyl radiator

Aluminum radiator + aluminum engine = very little crud in coolant. When you drain the system you'll be amazed how clean the fluid is. Don't forget to remove the plug on the bottom of the water pump behind the engine, you'll get a bunch of coolant from there. After removing the hoses I stuck a garden hose in the upper radiator fitting and ran water through it. I covered the lower fitting with my hand a few times to fill the radiator all the way up, then remove it to flush the radiator out. I replaced the hoses and filled it up with 50/50 Dexcool and distilled water. Works like a champ!

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Old 10-18-2011, 01:48 PM   #3
bk63
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Default Re: Flushing 4 cyl radiator

How hard is it to get to that plug in the water pump and is it going to come out easily or from past experiences with vehicles in general be stuck? Also is there a drain on the radiator? I seem to remember something about a plug on the bottom but can't see it unless I remove some parts in the way.

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Old 10-18-2011, 05:37 PM   #4
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Default Re: Flushing 4 cyl radiator

Radiator drain is on passenger side, facing the engine. No need to remove any parts on mine to see it.

It looks a little different from others I've done so you likely looked right at it and then missed it...Look again, you'll see it.

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Old 10-19-2011, 09:57 AM   #5
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Default Re: Flushing 4 cyl radiator

I have an '05 w/ 85k miles that I plan on just draining and refilling the radiator with 50/50 dexcool/distilled water, hopefully this weekend, and then again next oil change in a few thousand miles. Not sure if a "flush" is really needed if it looks clean.

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Old 10-24-2011, 07:12 AM   #6
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Default Re: Flushing 4 cyl radiator

Well I should be good for another 100k after this weekend. The draining and flushing part was easy. It was those spring clamps on the hoses that were murder to get off. Some of them there is no clearance and I replaced some with regular stainless clamps because I could not get them back on. Get yourself a pair of spring clamp pliers with an extension if you plan on replacing your hoses. That was the most time consuming part of the job and my hands are all banged up.

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Old 10-25-2011, 10:17 PM   #7
pdough
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Default Re: Flushing 4 cyl radiator

I drained mine a few weeks ago after 190,000+ miles on factory installed coolant; just unscrewed the plug at passenger side of radiator and let it drain. It came out so clean I thought twice about flushing and just refilled what was drained. Will do again in a few weeks just to get a bit more clean fluid in there...

So much for the Dexcool bashing in these motors I guess. On the other hand mine doesn't see really harsh winters or really hot summers either.

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