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06 Apex GT

mapo

Newbie
Joined
Sep 12, 2021
Messages
3
Age
57
Location
Ontario
Country
Canada
Snowmobile
Apex Gt
Just picked up an 06 apex gt and having some problems, When inspecting I noticed the three big idler wheels/bogeys were completely loose, no big deal right. Upon further inspection I realized the coolant tank and overflow are empty which is odd because there is no overheat light coming on even after running for a bit, There is a tiny amount at bottom of tank but the coolant lines and heat exchangers get warm. So now my questions are:

How to fill and bleed the coolant system?
Does the skid need to come out to change idlers?
Why doesn't an overheat alarm come on?
Could there still be coolant in the system/what couldve happened?

This is my first 4 stroke sled so used to the older 2 stroke cats, any help would be greatly appreciated. Did my research but looking if I could get a more direct answer.
 

RobX-1

VIP Member
Joined
Apr 13, 2003
Messages
1,285
Location
Coldwater, OH
Country
USA
Snowmobile
18 50th Apex XT-X, 08 40th Apex LTX GT, 08 40th Nytro RTX, & 03 RX-1
With this being your 1st 4-stroke Yamaha, I would recommend becoming a VIP member on this forum and in doing so, it will provide you access to receive the service manual for your Apex. This forum is probably one of the best forums where knowledgeable users offer help and supporting the site by becoming a VIP only ensure the site will be here for years to come. And, having access to the service manuals is also a nice perk but its the users' knowledge and their willingness to share is that makes this an awesome site.

Here are the excerpts on how to bleed the system:

1.JPG
2.JPG


Myself, I use this and it makes flushing your coolant a breeze:
https://www.amazon.com/gp/product/B01BW39HJS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

As for changing the rear idler wheels, I suppose it could be done while the suspension remains in the sled but considering all the washers and spacer tubes, it would probably be a lot easier to do with the skid out. Here's an image that shows you the washers and spaces I mention:
yamigps.JPG


As for the overheat light not coming on, you may not have ran it long enough or as you mentioned, there may still be some coolant left in the system. Cracking the bleed screw would be a good way to determine if there is any fluid in the system.
 

mapo

Newbie
Joined
Sep 12, 2021
Messages
3
Age
57
Location
Ontario
Country
Canada
Snowmobile
Apex Gt
Thats awesome, thanks alot for that useful information. Ill check er out and try and get this thing going good, its got 30k on it but herd these last a while if maintained.
 

maim

Staff member
Moderator
Joined
Jun 1, 2004
Messages
6,530
Location
sudbury on
Country
Canada
Snowmobile
2016 apex xtx/ 2011 apex xtx/ 2009 phaser rtx/x/ 1997 et410t/r
welcome!

just had a quick look for the tool yamaha used to sell for making the rear axle assembly easyer as it was slightly smaller than the shaft used and makes assembly much easier. i do it in the sled all the time and it can be done without the tool.

odds are it could use a coolant flush or replacement. i personally do all my toys with antifreeze every 5 years as reccomended by yamaha. top it off and check for air with the bleeder screws. odds are it is fine if you cannot see a leak. the reservoir never stays full on either of mine and the 2011 has 30000 km on it.
 

mapo

Newbie
Joined
Sep 12, 2021
Messages
3
Age
57
Location
Ontario
Country
Canada
Snowmobile
Apex Gt
Ok good to know, just pulled the idler wheels of after work, and gonna order some now, Is there any upgrade to these or are they all the same?
 

maim

Staff member
Moderator
Joined
Jun 1, 2004
Messages
6,530
Location
sudbury on
Country
Canada
Snowmobile
2016 apex xtx/ 2011 apex xtx/ 2009 phaser rtx/x/ 1997 et410t/r
the up grade for that sled is to outer wheels with replaceable bearings as the factory outers could not have the bearings replaced for those years. the ones from a 2011 apex will work on that sled and the bearings are serviceable.
 


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