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Discussion Starter · #1 ·
I have heard from more than one source that it is (essential?) to have the EVO6 serviced by a qualified dealer.

The blurb from Mitsubishi and the advice from the LTR FAQ is that the MUT-II should be employed to actuate the valves in a certain manner in order to bleed the air from the system.

I have a friend, a garage owner and EVO owner, who says that it is not necessary to use the MUT-II when doing this and he now does all his own servicing. Apparently after visiting a Mitsi dealer, talking to the engineer and watching him service the car, the need for the MUT-II was not as high as he thought it would be and now doesn't use it.

What's the real score with servicing the AYC in the EVO6 please?
 
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Discussion Starter · #2 ·
Dave,
Easy answer is but an RSX and then you don't have to bother with AYC ;)

On a slightly more serious note though, you only need the MUT II to bleed the ATF fluid that is located in the reservoir in the boot. This is the activation fluid for the AYC. The diff, gearbox and transfer box oils can all be changed by the good old traditional empty then refill method.

Andy
 
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Discussion Starter · #3 ·
Thanks for the swift reply Andy! Is the MUT-II *ESSENTIAL* though? In as much detail as you can go into :)
 
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Discussion Starter · #4 ·
We havent got the MUT here, and our cars run just as fine. The AYC fluid can be changed without the MUT. That's all I can tell you...
 
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Discussion Starter · #5 ·
Dave,
HH6 is the one with the info on this but I believe that there is a method by which you can bleed the ATF without the MUT II but this requires jacking all 4 wheels up and rotating the steering lock to lock to bleed the different sides of the fluid activation reservoir....

I'm sure he will expand more thoroughly than I've tried to do ;)

Andy
 
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Discussion Starter · #6 ·
i would be interested to know how they set the idle speed control motor without a mut !!!
i think,dont quote me,that changing the oils in the diff is ok for 4500 service
but should be bled with mut every 9000
 
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Discussion Starter · #7 ·
My understanding is that the issue isn't actually bleeding the sytem but ensuing you change all the fluid. The MUT activates the pump and drains all the fluid from the resevoir and then ensures that it is refilled. I have been told that you can do this by jacking the car with all 4 wheels off the ground. Then you turn the rear wheels by hand, first one way and then the other and this achieves the same thing. I would suspect that you need to have the ignition on as this will allow the pump to activate.

However, I haven't seen this done myself and don't know how successful it is. Hope this helps. My personal view is that it is worth having certain jobs done by people who really know what they are doing and this could be one of them.
 
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Discussion Starter · #8 ·
One of the most reputable Evo garages around is Steve Hill Motorsports. They never use a MUT-II and claim it is not necessary. I've been using them for a number years and never had an AYC problem. Dave, it may be worth while giving them a ring to find out their thoughts.

Dave
 
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Discussion Starter · #9 ·
I just called Steve Hill Motorsports - a BIG thankyou to them, very helpful bunch of guys! (pity they're the other end of the country to me) - Dave Hill didn't mind giving me all the info I wanted! The info they gave me (which answers all these questions) is as follows:

During the 4,500 mile service they only drain the fluid in the clutch pack (which equates to 1 litre) and this is drained directly from the diff. They then refill it with 1 litre of Diaqueen ATFMM-SP3 from the filling hole.

As any damage done is always in the clutch pack that's the only fluid they change, the fluid remaining in the tank is left alone unless it's discouloured (it goes darker / black) but they've never seen it gone discouloured yet. If you DO need to change the fluid in the resevior, Mitsubishi say it must be pumped out but it CAN be gravity fed (two bleed nipples are on the diff). Note that it WILL take a long time to gravity feed and it is in fact better to pump it.

They added that unless you drain the system you're not going to get an air lock. And the air-lock, my friends, is when we need the MUT-II!
 
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Discussion Starter · #10 ·
Simon,

The issue IS to bleed the activation fluid correctly, so as to stop pump cavitation because of air in the system.

The next part of your explanation is complete rubbish, I think its a case of chinese whisper again ;)

My personal view is that it is worth having certain jobs done by people who really know what they are doing and this could be one of them.

For you, definately take your car to the garage! :)
 
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Discussion Starter · #11 ·
Dave,
Spot on advice from Steve Hill (as usual) however just to add to it.

According to the Ralliart/Mitsubishi service schedule and I quote:
Every 4,500 miles or 6 months:
8) Replace AYC fluids. (Differential and amp; Reservoir)

Now this means to me that at every service the fluid in the Differential ,which should read Torque Transfer mechanism, is changed (AYC fluid around the clutch packs) and the fluid in the Reservoir i.e. actuator system is also changed (ATF-SPII in the reservoir and actuator hydraulic system). The true Differential fluid is not officially scheduled to be changed until 45,000 miles but thats a different story!
To my knowledge I only think the hydraulic system fluid has been changed once on my car and thats fair enough because as Steve Hill quite rightly has said it only needs doing if it does become contaminated or if there is a problem with the system, mine was done early on in it's life simply because it was required to be done on the service sheet (I suspect). After swapping garages it hasn't been done since which suggests there is a change of thought on this.
You only really need the MUT-II to drain/bleed the hydraulic system efficiently, it can be done without the MUT-II and it even details how to do it without it in the Workshop manuals however some people have tried it this way and I understand it can be awkward to remove all the air from the system.
I will make inquiries and find out what the official Mitsubishi line is on servicing the AYC every 4,500 miles, i.e. what should be done.

On a slightly separate note I personally think the whole service schedule could be re-written and improved upon, some of whats put on there is a bit worrying (like the gearbox, transfer box and rear diff fluid change points) and other stuff is done too often when not really needed.
 
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Discussion Starter · #12 ·
Agree with you HH6 on the service interals. Gearbox oil change too infrequent, AYC actuation fluid should need changing at about same frequency as brakes.

What about rewriting the service form?
 
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Discussion Starter · #13 ·
MUT II sould be used on every service to set up stepper motor for idle speed control, also service check sheets will be changed in the short future, which has changed slightly.
 
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Discussion Starter · #14 ·
Re:What's the real score with servicing EVO6?

Yes I got the low down on this.
4,500 mile service will become just a oil and filter change with the other normal checks.
AYC (Torque Transfer clutches) and Reservoir (actuator hydraulic system) fluids will now be changed at 18,000 mile intervals.
 
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Discussion Starter · #15 ·
I used to use a Rallart dealer to service my car because of the MUT II. Not just for AYC reasons, but also to check the ECU and no problems were being logged and one or two other things. Unfortunately they didn't have a clue what they were doing with the MUT II and didn't even know what an error code was. Took the car to Steve Hill after that.

Dave
 
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Discussion Starter · #16 ·
Steve Hill Motorsports every time for me - Dave Hill - top Evo mechanic - Mike's the other chap, but I think he sits in the office surfing porn all day !! (only joking Mike, if you are reading this)

They looked after my Evo V from new, as it was an import there was no worries with warranty and who serviced it etc. These guys serviced |PLS| AYC changed everytime, no probs.

I recently bought an Evo VII from Ralliart and they have agreed that the VII can be serviced by Steve Hill Motorsport and retain its warranty status (after all, they build rally spec Evo's at the place so must know their stuff) - however Ralliart are insisting the VII goes to my local Mitsubishi garage for the AYC changes - no great shakes for me, however when I went to my local Mitsubishi garage they poo poo'ed me for buying an import and said that their MUT machine wouldnt be able to 'talk' with my car as it was a Jap spec !!!!

There I was thinking my car was multi lingual !!! silly me.

I cant help thinking that there is a lot of false info flying about the Evo community regarding these technicalities.

Mozz
 
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Discussion Starter · #17 ·
Re:What's the real score with servicing EVO6?

Mozz,
They probably meant that they didn't have the E7 ROM pack for their MUT-II yet and just used that as an excuse to slag off imports. Just slag them off back and go elsewhere, for some reason they don't like that :D
 
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Discussion Starter · #18 ·
Mozz

That is worth a name and shame ! As for them slagging off imports, CCC advertise that the main dealers will look after and service imports, no problem. Obviously, this dealer needs to get with the program! As for their MUT not being able to talk to a Jap spec car, even my limited knowledge makes me smell large quantities of bull#### :D
 
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Discussion Starter · #19 ·
Funny thing is, when I pulled up outside their garage the other day, the whole workshop came bounding out all excited at the prospect of oggling a new VII.

Then they asked if I would leave it with them when I next need an AYC change for a couple of days so as they can take some customers out in it as they cant get hold of any demo's !! they offered a free valet for this !!!

First they poo poo my 'import' (even though its a Ralliart supplied car - so its as lighter shade of grey as anyone is going to get) - then they want my pride and joy so as a load of test pilots can rag the arse off it !!

Thing is, I cant be arsed trecking up to Ralliart in Dudley every couple of months to get the AYC done, and my warranty is invalid if I dont get the Mitsi stamp in my service book !!!

Unbelievable.

Mozz
 
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Discussion Starter · #20 ·
Mozz, I got the exact same blurb from an Edinburgh dealer. He mentioned that if my car went tits up, there would be increased man hous to fix it, as the diagnostic units could not speak Japanese, only Engleesh' After I fell about laughing I just took my car elsewhere, where they have bi-lingual units ;) This is also the dealer that bust wheels studs and charged me £52/hour to fix their ****-up. On challenging this (rather strongly) I was escorted off the premises by two mechnics and they threatened to call the rozzers.

Main dealers......pahhhh!!
 
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