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Coolant Flush, Do I replace the water control valve?

720 Views 13 Replies 4 Participants Last post by  amc49
Trying to do my own flush @ 110,000mi. I know to change the lower tstat but those with experience, do you also replace the water control valve?
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I don't have a service manual for a 2011 Versa, but looked at my 2016 Service Manual and only found one thermostat for that cooling system.

There appears to be a complex water outlet for the 2011 Versa 1.8L with CVT transmission, are you talking about that component?

Are you concerned your thermostat is bad?? You can test it by heating up some water (on a stove) with a thermometer and seeing when it opens.
The thermostat in my GM work truck lasted over 20 years before I had to replace it.

I'm all for doing proper preventative maintenance on a vehicle, but I also follow the old adage of "If it ain't broke, don't fix it."

If you are asking my opinion, I'd leave it alone. Yes,,, flush the cooling system, yes... put in fresh Nissan coolant, but leave the rest alone.
Yes... I've reused the dex-cool for my truck. I do strain it through an old T-shirt to capture any foreign matter... but yes, if the coolant isn't that old, sure re-use it.
@amc49 By your logic, he should replace all the hoses, the radiator, radiator cap, water pump, thermostat and this water valve, because any of those components could fail without any notice.

There is a reason they put a water temperature gauge and/or light on vehicles, so the driver can pull over and shut off the vehicle before damage is done.
@Tynker Has Nissan issued a TSB on this "water control valve"??
Many cars I had, including current 2017 and 2018 Versas, do not have a water temp gauge, only the warning light. I wish they had the gauge. When the light turns on, it could be too late.
My 2016 Versa only has a water temp light, when it ages a little more, I'll add an aftermarket water temp gauge. I do remember reading somewhere that the water temp light does come on early enough to give you some time to get off the highway or pull over (before damage is done).

I'm on the fence about the installing a "ScanGauge 2" that plugs into the OBD2 port and gives you a temperature number, as you drive. I'm not a fan of leaving something plugged into the OBD2 port for extended periods of time.

I do wish Nissan had included a water temperature gauge in those "S" package Versa(s). Save the money they spent on electric mirrors and give me a water temp gauge.
I've replaced radiators at 100K on vehicles. In my experience, I've found that the radiators with plastic tanks grafted onto aluminum cores fail where they are fused together. Some have failed at 100K, 150K and 200K miles. I think it depends more on the number of heat cycles the vehicle has been through.

I will agree with you that I'm disappointed with the CVT transmission situation and Nissan's response. I did my research (prior to purchasing my Versa) and opted for the manual transmission model. I've been quite happy with my Versa, with the only exception being a lack of a temperature gauge, which I will remedy with an aftermarket "add on" (at some point). I do intend to keep my car for many years.

@amc49 You seem like you want to argue with me and put down my opinion on everything. You can certainly give your opinion without disparaging mine. At this point, I'll leave this thread.

@Tynker Good luck with your car.
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