Virtual Mechanic

 

Free motoring tips, by Virtualmechanic.com.au, Melbourne, Australia.

Mitsu Engine 4G63 SOHC timing belt and the benefits.

When  the Sirius 4G63 SOHC engine 1992 a free rotating design it was an engine suitable for many applications. The timing belt with a free rotating component is the perfect solution to increase economy and performance.
Free rotating engine simply means if the timing belt should break it any time no internal mechanical damage is evident to the engine.

Not all engines designed with cam belts are free, in my opinion all engines designed with timing belts should be…

 To utilize a sustainable engine design,  it may help minimize servicing costs to the average motorist worldwide looking at ways to save money anyway possible.

Be careful not to confuse the 4G63 with the 4G64
The 4G64 is an interference motor however the early 8-valve is a non intereference engine.

As part of my research I made contact with Mitsu
This is the type of help I got

Dear Mr Gow-Brown,
Customer Reference: 131675
We acknowledge receipt of your recent correspondence regarding Saturn motors.
Firstly, please accept our apologies for the delay in our response to you.
Mitsubishi Motors Australia Ltd (MMAL) do not use Saturn motors in any of our vehicles.
Thank you for your enquiry.

Kind Regards,
Mitsubishi Customer Assistance Centre

Well thankyou for not much help…..

Written by Darren Gow-Brown, author of Virtualmechanic.com.au  
 
Darren Gow-Brown
Motoring Writer
WWW.Virtualmechanic.com.au

In all my time is founder of Virtual Mechanic the following issue with a Toyota Camy tempreture gauge reading high after a short drive would make most people think the repair may lead the a costly repair.
But I cannot take the credit for a very good outcome proving that the real problem was a poor earth connection.
It was Neil Gray of Brisbane that found this problem by going to the trouble of locating a vital earth connection that was required to complete the tempreture sender to guage circuit.

This issue with the Toyota Camry may cost many motorists a costly mistake if not diagnosed correctly, to all who read this and rectify the problem at minimal cost will be gratful to Neil Gray.

May I add that all Car manufactures, Toyota, Holden, Ford, Nissan, Mitsu, etc should be offering and sending data in the form workshop manuals free of charge to the Virtual Mechanic to help prevent costly mistakes at any workshop or service centre.

I thank Neil Gray for going to the trouble of locating the cause of the high tempreture reading leading to a poor earth connection secured at the engine exhaust manifold.

Written by Darren Gow-Brown
Virtualmechanic.com.au

Name Neil Gray
State & Suburb Brisbane QLD>

Type of Vehicle Toyota
Model Camry
Month/Year 12/1990
Kms 120,000
Problem This is a fuel gauge problem. I have replaced the sensor and the gauge.
The gauge goes to full scale after a short time(1min)
I’ve had the coolant temp checked its O.K
The fans come on O.K if I”m stuck in traffic for a long time and go off when i get rolling.
Please help as motorama don’t know what i’m talking about
ta neil

Your Question does not make sense

No thats because im an idiot Its The TEMPERATURE GAUGE THAT GOES FULL SCALE
Thanks for your patience Darren
Neil Gray

Ok Neil,
 
Now the temperature gauge goes to full in one minute this sounds like its either a faulty gauge or something causing the coolant to rise in temperature
When the cooling fans switch on can you count how many minutes or seconds the thermo fans stay on
 
Darren

i’ve replaced the gauge
the fans stay on  for about 2mins when i get moving.

Darren wrote:
@ minutes is far to long if we use an example of a standard passenger vehicle in normal operating condition its around 40 seconds
therefore you have a cooling system issue

Could it be the thermostat?

Darren wrote:
Yes the best way to measure the thermostat is with the engine at normal operating temp and the engine switched off feel the upper hose and the lower radiator hose and check for a difference in temp
Neil you may also have a blocked radiator to give the same result
D

hi darren,
thanks for the help..i’ll get back to you when it stops raining and i can look at the problem.
thanks again
neil

Hi Darren,

I have replaced temp meter
I have replaced the thermostat
I originally replaced the sensor

The car still runs O.K.
The meter still goes to full scale
The coolant seems to be circulating O.K.

Could it be:-
(1)  Water pump not working efficiently?
(2)  Faulty sensor sold to me new ?
(3) Meter Mother Board in dash?

I am about to attack the horrible thing with a sledge hammer

Hi Darren,

I’VE FIXED IT

Having looked at the electrical wiring diagram I thought it could be that the earth on B5 of the combination meter plug was missing.
This earth comes from a point on the engine manifold at the rear of the engine.
THE EARTH WAS NOT CONNECTED PROPERLY.
THE GAUGE NOW TELLS THE TRUTH

Happy days

Thanks for your efforts on my behalf on this very obscure problem.
I thought you might like feedback on the fix

Hi Darren,
I have added a note to diagram in magenta
Hope this is satisfactory

Hi Neil

I have published your efforts, and hope many people will read this an not make a costly mistake of a Head repair……..

Virtualmechanic Darren Gow-Brown free online video is explaining checking the brake Fluid is vital to prevent breaking down on the side of the road.

Virtualmechanic Darren Gow-Brown free online video is explaining checking the tyre pressure is vital to prevent breaking down on the side of the road

janelle 
State & Suburb nsw bowral

Type of Vehicle mitsubishi
Model magna
Month/Year 11/1999
Kms 399,836
Problem I need to locate the starter motor and not sure where to look.

Janelle,
 
 
Take a good picture of your engine and send it to me And I will circle the starter
 
DGB

Ruby
State & Suburb Omak, WA

Type of Vehicle Mitsubishi
Model Mirage
Month/Year 1989
Kms 121,300
Problem When starting my car a belt is squealing and then it will quit. When I accelerate after stopping or slowing down it squeals again. Please give me an idea what belt would be making this noise. I know there are 3 belts in this car.
Second e-mail
When starting the car or accelerating after stopping or slowing down one of the belts is sqealing and making noise. It quits after awhile or until you have stopped and accelerated. Please advise which belt could be making this noise. Thank-You
Third E-mail
When starting the car or accelerating after slowing down or stopping one of the belts is squealing and making noise. It will quit after a few minutes after starting it or not accelerating.
Forth E-mail
One of the belts squeals when starting the car and accelerating after slowing down or stopping. Please advise which belt it could be.

Answer
Ruby,

It sounds like the alternator belt if you press on the belt (WITH THE ENGINE AND IGNITION OFF) you may feel a loose belt but check to see if its cracked inside.
If so replace the belt.

You sent 4 e-mails I got the point on your first e-mail

Caution never check the radiator when hot or risk severe burns to your body

Use caution when performing this task, do not remove plugs when the engine is hot