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Car Temperature Plummets When Going Thru Car Wash

13K views 30 replies 14 participants last post by  rocky  
#1 ·
Our 2018 Touring has no known oil or heat issues, but have noticed that when fully warmed up (red line pointing at the angle in the gauge), the marker drops like a rock when going through A 3 minute automatic car wash. The needle drops showing only 2 white lines like the car was just starting to warm up. After leaving the car wash, the car is up to normal operating temp within 1/8-1/4 mi. Outside temp was right at freezing. Car in neutral during wash. Never noticed it in any other car.
 
#2 ·
Is your HVAC set to AUTO?......if so, efans are sucking cold car wash water thru the radiator and into the engine compartment. Turn motor off when entering, on when exiting.
 
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#4 · (Edited)
"See if that helps"????? Helps what?

Only thing you have to turn off is the motor.
 
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#10 · (Edited)
I always use recirculating system in car washes. Hate the soap and wax smell!

The absence of any load on the engine will cause it to cool. And as others point out and spray will cool.

On the first point-stand outside in 32 degree weather and do nothing you will get cold quickly. Go out in 32 degree weather and run, you put "load" on your body and get hot.,
 
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#12 ·
I'm just waiting for someone to tell the OP to stop going through automatic car washes.

But back to the topic. If you heater or AC is on, so is your engine fan. Add to the fact you are spraying cold water on the radiator, intercooler and engine, of course it's going to cool off.
 
#26 · (Edited)
Yes, I turn the engine OFF. The car wash I use pushes the car along beginning to end (car in neutral). After the blow dryers, I start the engine and drive off. Can’t recall observing the temp gauge when leaving the car wash.
 
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#23 ·
Motor isn't restricted to electric motors in the auto world, i.e. motor=engine.

BTW, most car wash would advise the customer to keep the engine running through the wash. I guess to reduce the chance for them having to push your car out if it fails to start after the wash.
 
#24 ·
I don't know about temp controlled fans, but here is SoFla, if the climate control is on Auto, the radiator slats are open and I think (don't know for sure) the fans run, even around 50F. I have no idea and no wish to find out if that is the case at 32F. Beyond that, after 8 months and only 4,000 miles (so no long trips), I have no issues with my 2018 Touring.
 
#28 ·
What the heck is Honda doing these days with the CR-V? It seems everyday somebody is posting something new and crazy about this model. I have a 2010 and it is a rock star compared to the new model. Honda sells close to 400,000 of these CR-Vs a year in the USA so they better watch their reckless R&D effort. If I was the head of Honda I would drop the Turbo engine like a bad habit and only put the 2.4 in all CR-V models. If these problems go on much longer and they keep building the same turd the reputation and re-sale value will be shattered.
 
#30 ·
Says the guy with oil consumption issues and engine hesitation.... 5th gen resale is fine.

If you shut an engine off and spray it with cold water I'm pretty dang sure it should cool off. This is basic car knowledge. The range of the coolant gauge is about 130F to 180F for full temp so cooling off 40-50 degrees is pretty dang easy.
 
#29 ·
Maybe Honda should amend the owner's manual to include a car wash warning.:whistle:
 
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