2003 400 oil cooling system - ATVConnection.com ATV Enthusiast Community

Go Back   ATVConnection.com ATV Enthusiast Community > Brand Discussions Area > Arctic Cat

LinkBack Thread Tools Search this Thread
Old 10-01-2012, 08:23 PM
Weekend Warrior
Join Date: Jul 2012
Posts: 5
Default 2003 400 oil cooling system

Ok, I have a 2003 arctic cat 400, some please explain to me the oil cooling system. the radiator I have, how do I check fluid level ? what fluid do I use in radiator ? In my owners manual it talks a little about the radiator on a 500, but not on a 400. I posted in an earlier post that after running my machine for a while, my legs started to get real hot. and I noticed that my radiator fan was not comming on. so I wired it into my egnition switch so when I turned on the key it would run all the time, ( thinking this would solve my legs getting hot problem, It Did'nt.) so now I am trying to figure out what else it could be.. Is my oil cooling system pluged ? is my fluid just low ? I took the garden hose and washed down the outside of the radiator, that did'nt help... There has to be a reason why, I never had a leg heating problem before this year. another thing my radiator warning light has never come on. Please Help,
Reply With Quote
Old 10-02-2012, 08:02 AM
Join Date: Dec 2007
Posts: 48

My wife rides a 05 400 with the same set up. Simply put, oil from the engine flows through the "radiator" and when the engine gets "hot" the fan kicks on to help cool the oil in the radiator before it re-enters the engine. Those engines typically run warm and it will be noticeable on your legs. We ran for two days at Hatfield/Mccoy this summer when it was 100 degrees and although it was warm we had no problems. Just make sure your oil is at the proper level..
Reply With Quote
Old 10-02-2012, 08:42 AM
TLC's Avatar
TLC TLC is offline
Extreme Pro Rider
God forbid he lets the polishing secret out!
Join Date: Jul 2006
Posts: 11,496

Oil cooling is pretty well 100% trouble free. It just makes the oil circulation a longer trip out side the motor before re entering the motor allowing the oil to be cooler then a machine with no oil cooler at all.

Even with no fan on the oil cooler it still does its job by the fact the oil has been re routed from the crankcase through the oil cooler rad before entering the motor again.
My 350 Yamaha had a oil cooler but no fan assist whats so ever.
Air cool Motors really do not have a over heat light but more of a warning light that tells you your oil is low or oil pressure.

My 250 Yamaha Moto4 never even had a oil cooler.

"Wet sump" motors hold there oil in the motor's crankcase and use oil coolers the most.
My 500 has a "Dry sump" motor where the oil is held in a separate outside oil tank away from the motor so the oil tank kinda acts as a oil cooler.
2001 Yellow 500 H.O
No Plastic roll cage
5.25 gas tank.
2007 350 Grizzly
Diff lock.
Reply With Quote
Old 10-04-2012, 04:24 PM
Pro Rider
Join Date: Oct 2003
Location: Alaska
Posts: 1,244

Check the color of your spark plug. I have the same machine 03 400i. In the past, when my leg begins to get a little warm the plug is getting darker (towards black from tan) so it is running rich. It is very easy to notice at night when the exhaust glows a cherry red!

I usually replace the plug, check the air jet setting on the carb and as a last result check the valve clearance.

It has alsways gone away. But, it has also always ran a little on the warmer side.

Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Bear Tracker 250 idling issue Hw00d Yamaha 4 09-10-2015 09:53 AM
Denali plow passes our testing & ready to sell! MrThor TheATVSuperStore 0 09-09-2015 08:43 PM
1996 and 2001 trailblazer 250 winch mount chewy78 Polaris 1 09-08-2015 11:37 AM
Jim Beers on Wildfires/Forest Fires Fior Dummies Elkaholic Land, Trail and Environmental Issues 1 09-06-2015 03:44 PM
Interesting Discovery - Electric Fatbike lancemll88 CAN-AM (BRP) 1 09-05-2015 04:16 AM

03, 2001, 400, 500, arctic, atv, cat, check, cooling, fan, oil, radiator, rich, running, system, working, yamaha

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 03:16 PM.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company