cold water harm hot engine? - Yamaha Raptor Forum
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post #1 of 13 (permalink) Old 06-28-2012, 04:35 PM Thread Starter
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cold water harm hot engine?

just curious, i always see people riding raptors then going right into water, sometimes even above the tires and touching the engine. does it harm it at all if cold water is splashed on a hot engine?
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post #2 of 13 (permalink) Old 06-28-2012, 05:17 PM
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Atv's are remarkably resilient. Its amazing the punishment they can take.. I have ridden years through water,deep mud and the like. Never had a problem with a hot engine. Bearings yes..

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post #3 of 13 (permalink) Old 06-28-2012, 05:44 PM
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it affects a air cooled motor more than a water cooled but they can handle it


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post #4 of 13 (permalink) Old 06-28-2012, 06:48 PM
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I've seen my cousin with the front tires floating, in mountian water, reving the piss out of it. He tourtes that bike and still wont quit.

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post #5 of 13 (permalink) Old 06-28-2012, 08:13 PM Thread Starter
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ok that answered my question....thanks for the input guys
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post #6 of 13 (permalink) Old 06-29-2012, 05:15 AM
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Originally Posted by ADRUNK3NH0B0 View Post
just curious, i always see people riding raptors then going right into water, sometimes even above the tires and touching the engine. does it harm it at all if cold water is splashed on a hot engine?
Yes you can damage the engine, a hot cylinder and hot piston working together is okay, but when you expose the engine into cold water, it cools off the cylinder quickly and the piston stays hot, this can cause clearances between the bore and piston to decrease and could cause the piston to seize in the bore and or damage to the piston and cylinder............


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post #7 of 13 (permalink) Old 07-01-2012, 09:32 AM
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Yes you can damage the engine, a hot cylinder and hot piston working together is okay, but when you expose the engine into cold water, it cools off the cylinder quickly and the piston stays hot, this can cause clearances between the bore and piston to decrease and could cause the piston to seize in the bore and or damage to the piston and cylinder............
With a liquid cooled engine this could still be possible but is less likely to happen than with an air cooled motor. The warm/hot coolant immediately surrounding the cylinder/sleeve will help slow the cooling rate if it is just a quick splash. However, if you are driving through cold water for a longer period it would be like starting and reving your quad in cold temps without letting it warm up.


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post #8 of 13 (permalink) Old 07-01-2012, 12:29 PM
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Couple months ago on the last ride, we were on a trail that got overtaken by a beaver. This was pretty much the end of the trip, so everything was good and warm, ended up going thru foot and half of water, was over the tires, cleaned it off nice, but didn't have any issues....

I would think that if the motor was super hot and then going in super cold water, then possibly have some issues.
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post #9 of 13 (permalink) Old 07-01-2012, 02:16 PM
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Couple months ago on the last ride, we were on a trail that got overtaken by a beaver. This was pretty much the end of the trip, so everything was good and warm, ended up going thru foot and half of water, was over the tires, cleaned it off nice, but didn't have any issues....

I would think that if the motor was super hot and then going in super cold water, then possibly have some issues.

Here is my experience that led me to what I said earlier. Several years ago I had the Raptor out in a spring snow storm and I was doing donuts in the slushy snow, some snow was splashing against the hot engine and I thought nothing of it, later I noticed a very faint knock in the engine that wasnt there before the doing the donuts. I dismantled the engine and found a scuffed piston, nothing serious but enough to tell me it was caused by the snow that had been splashing against the engine cooling it off the cylinder and seizing the piston................


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post #10 of 13 (permalink) Old 07-01-2012, 03:53 PM
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Snows slightly colder than most creeks here in the US are in the summer lol


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