CAI and car washes. Engine on or off? - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
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View Poll Results: Engine on or off during a car wash?
Off 12 42.86%
On 16 57.14%
Voters: 28. You may not vote on this poll

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Old 12-09-2006, 05:14 PM   #1 (permalink)
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This is a general question about CAI and automatic car washes. Do u guys turn off the engine or leave it running, especially if it does the under carriage.

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Old 12-10-2006, 10:40 AM   #2 (permalink)
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Does anyone use a hydro shield cover over the air filter?
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Old 12-10-2006, 10:45 AM   #3 (permalink)
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I keep mine on when I use the autowash's. BUt I try to stay away from them as much as posible as they are basically a waste of money except in the winter when it's to cold to get out and wash the salt and crap off..

I havn't had a problem in about 6 months or more of having the CPE MFACI. and I removed all of the grill inserts so it is wide open to my airfilter...

Any water that isn't first absorbed by the intake still has to travel all the way through the pipe. THEN on top o fthat it still has to go through extremely high heat. Which will evaporate ane burn off any water.

Then even after that, you still need enough left to cause any damage. It's not going to happen unless you are the very few unlucky people.

I won't say something bad CAN'T happen. but the odds are for you that it won't. The problem comes wen you actually insert the hole filter in to water which gives it suction to actually force up large amounts of air.. when then you are screwd
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Old 12-10-2006, 10:46 AM   #4 (permalink)
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I never really gave it much thought, but I've done both. Mostly keep it runnin', but on Friday I turned it off. Yes, it has an under carriage wash and no on the hydro cover.
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Old 12-10-2006, 10:51 AM   #5 (permalink)
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I always leave mine running because its not high standing water and thats when problems can occur. I also have the hydro shield which works really well. I once held the filter with the hydroshiled on up against a garden hose going full blast and not a drop of water got in, so in short I don't worry about car washes...
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Old 12-10-2006, 10:57 AM   #6 (permalink)
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Quote:
I always leave mine running because its not high standing water and thats when problems can occur. I also have the hydro shield which works really well. I once held the filter with the hydroshiled on up against a garden hose going full blast and not a drop of water got in, so in short I don't worry about car washes...
[/b]

Thats a bold strategy, haha. But I only had one problem at night during a flash flood i ran through really deep water that I couldnt see and the intake sucked up some water. However, I got really lucky and made it home than let it sit overnight and ran it at high RPMS and everything has been alright since.
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Old 12-10-2006, 11:02 AM   #7 (permalink)
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haha The filter was off the intake and in my hand when I sprayed it if thats why you say thats not a good strategy.
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Old 12-10-2006, 02:30 PM   #8 (permalink)
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Quote:
Thats a bold strategy, haha. But I only had one problem at night during a flash flood i ran through really deep water that I couldnt see and the intake sucked up some water. However, I got really lucky and made it home than let it sit overnight and ran it at high RPMS and everything has been alright since.
[/b]
If you drove through a puddle big enough that allowed the intake to actually be submersed and suck up water in to it. You wouldn't have made it home. Hydrolock happens right away. not gradually over time..

You probably just got the filter wet from splashing water but didn't get anything more then a small fine mist sucked up that burned off. Not actaully sucking any water up in to it though.
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Old 12-10-2006, 02:52 PM   #9 (permalink)
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I know AEM an d some others sells a CAI bypass valve...Looks like a doughnut and let the enige suck air throught the valve (place higher up in the enigne bay) when the pressure get too great to suck through the filter ie. if your in a deep puddle!
gonna look into gettin one of these for myslef!

ps. i keep the engine running @ the carwash!
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Old 12-10-2006, 03:21 PM   #10 (permalink)
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Quote:
I know AEM an d some others sells a CAI bypass valve...Looks like a doughnut and let the enige suck air throught the valve (place higher up in the enigne bay) when the pressure get too great to suck through the filter ie. if your in a deep puddle!
gonna look into gettin one of these for myslef!

ps. i keep the engine running @ the carwash!
[/b]

Where did you find this? It doesn't sound like a good investment unless you plan on modding your 6 into a hydro craft. Driving through puddles? What ever happened to just going around the lake and not into one? CAIs are nothing to be afraid of. Just use common sense.
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