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Old 10-21-2017, 05:44 AM   #1
datlas
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Default Radiator Flush?

True Confession Time:

Original owner 1998 SL. 160K miles.

I don't believe I have EVER had a radiator flush. I recently had the car in the shop and the mechanic said the fluid is dirty and suggested a flush. At this stage, will that do more harm than good? Worth doing?

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Old 10-21-2017, 06:30 AM   #2
Waiex191
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1999 SL2
Default Re: Radiator Flush?

I had mine flushed and changed to Green stuff at 30K. Next time I touched it was at 204K. I'd say it is worth doing.

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'99 SL2, owned since new
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Old 10-21-2017, 04:56 PM   #3
dummo
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1997 SW2
Default Re: Radiator Flush?

Yes, flush it. And flush it again!

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2004 Ion3 new 11/2003 (totaled) 11/2011 -23 mpg
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Old 10-21-2017, 09:59 PM   #4
bachands
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2002 SL2
Default Re: Radiator Flush?

+1

Flush the system. You will get better heat transfer to the coolant, which will give you hotter heat inside. It should also heat up faster

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Old 10-23-2017, 10:38 AM   #5
alordofchaos
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1998 SL2
1997 SL2
Default Re: Radiator Flush?

No harm can come from a flush, done correctly. It's quite easy to do it yourself and that would be the best way.

If having a shop do it, see if they will allow you to bring your own antifreeze and distilled water. About a quart of water will remain in the heater core area and if they refill using a 50/50 premix, your coolant will be weak (less of an issue if you are in a hot part of the country, a concern if you get cold weather)

They should fill with full strength antifreeze, then top off with distilled (some shops just use tap water . . . any problems will not show up for many years/tens of thousands of miles, so no big deal to them)

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