But time and wear, with its regular street duties wore the vehicle down till it was no longer viable to keep the vehicle on the road which was disappointing but necessary. The Ralliart Magna with its upgraded interior, Climate Control, Cruise Control and of course, the Evolution Lancer styling was definitely a good upgrade over the previous basic specification Magna. The majority of modified items from the original magna were swapped across. Recently finishing a Supercharged Stock 6G75 engine pushing kw in an AWD magna, the choice was easily made and the 6G74 engine was pulled out and a slightly modified 6G75 motor refitted.
The heads were removed, reconditioned and fitted with the valve springs, cam gears and camshafts from the original engine, The distributor was removed and fitted with the 6G75 cam sensor mated up to the up spec Haltech Elite ECU Package.
A decompression plate was fitted to reduce the higher compression The remaining Twin Turbo gear was fitted across, and then placed back into the car. New intercooler piping was made with aluminium pipework although this pipe work is planned to be redone by more professional welders.
Painted black the plan was retain a stealth look and hide our bad welds. With the combination of the larger capacity engine, higher flowing heads with larger valves, the motor had a much greater potential for not just more power, but great low rpm torque, reduction in turbo lag and overall improvement in driveability. Other tweaks included complete conversion to Coil over Plug Ignition, Active knock sensor control via the Haltech, and duel channel wide band control with individual fuel trimming for Left and Right hand banks and best of all, Fuel Flex setup for E85 Compatibility.
At the same time, the koni suspension was replaced with K-Sport coil over suspension and immediately made a huge difference to the way the vehicle drove on the road. Unfortunatly the vehicle never made it to the dyno with a core plug corroding and causing a coolant loss resulting in engine damage. The engine is now out of the vehicle and is being rebuilt with forged internals and to be fitted with an ARP Main stud kit.
Other upgrades include a newly designed duel plate clutch kit since it had become too difficult to retain driveability and consistency with the single plate clutch system. Once the new motor is completed sometime in the vehicle will be back up and running with a petrol and E85 race fuel tune. It will be interesting to see the results.
Customer Vehicles. Brembo Front and Rear brake upgrades incl rotors Results Once the new motor is completed sometime in the vehicle will be back up and running with a petrol and E85 race fuel tune.Upper Intake Manifold This is a very common upgrade for many of you out there.
This design can affect how efficient the air flows into the combustion chamber, as well as how much air is taken in. Also between the "squished manifold" and one of these upgrade manifold options is that they can increase better mid-range to upper mid-range performance.
You will see the obvious difference is the intake runners between the two. Also the other clear difference is the size of the air inlet section of the manifold before it goes into the runners. The throttle body mounting plate is also a different size bore is larger on Diamante than the stock unit. The differences with swapping from the stock manifold are fairly limited and "minor. The stock MAP Sensor will fit onto the Diamante manifold, but you will have to fabricate a longer EGR tube to run from the rear exhaust manifold to the upper intake manifold.
This is something that can be "blocked" if the build requires that route, but for the majority of people who need to pass emissions it is in your best interest to have a piece fabricated. The manifold is also going to set your throttle body off more to the driver's side of the engine bay due to the straightened intake runners.
This is only a minor issue and you should be able to fabricate the correct intake piping for the bend needed. For some, depending on the specific build you may need to relocate the battery from the stock location. The Diamante Upper Intake manifold has an inlet size of about 69mm, with the potential to safely increase the bore mm.
The stock manfiold has an inlet size of only 60mm. In my eyes, and even in your own as you can see in the photosthis is the "best" choice for a manifold upgrade. The throttle body inlet size is the same as the Diamante unit roughly 69mm. Doing this type of fabrication is generally needed for those running a larger throttle body such as one from the Infinity Q45 which is a stock 90mm unit largest production TB made. Below pictures the XG manifold side by side with the early model Diamante manifold.
You will notice a sizeable difference between the two in the plenum areas. Also note that the MAP sensor locations are on opposite sides of the manifold as well.
The EGR mounting location is about the same, but the EGR valve from the Diamante or stock manifold toocannot be used on the XG as you will see in the photo they are different.
The XG actually uses a EGR valve that has the exhaust gas pipe running directly into the EGR valve which makes it easy to fabricate a piece for those with emissions. There is additional volume in the XG plenum as you can see in the photos of the Middle section of the manifold.Forum style by ZTech. Log in X User Name Register. Password I've forgotten my password. Remember Me? This is not recommended for shared computers.
What's New? Thread: 6G75 engine failures. Showing results 1 to 15 of Just an observation that most of the engine failures I have heard of or personally seen are due to main crankshaft bearing failures, NOT conrod bearings.
Then its engine failure. Solution is drop the sump and replace the bolts with heavier ARP bolts. Hope it help someone.
Vehicles Mitsubishi Galant ES. Nice info man! I'm surprised I haven't heard of more 6g75 failure. Red blower is correct on this it's the reason I had to have my 75 crank cut, only 77k on my motor. For some reason the crank bearings where really scratch up.
Gen III 6G75 Engine Interchangability
I mean clean. Triple Diamond Motors East Cost 02 2. Even mitsubishi itself reported crank failures in their longevity testing. If you want to push that thing you need some good lower end work! So if I do this swap I need arp studs ect Cuz I have been really planning to do this swap. Well, what size of a budget are you looking for?
What are your power goals? How much down time can you afford with your car? The 75 stretches main bolts due to the long throw short rod nature of the rotating assembly.6G75 Stratus vs 4G64T Eclipse
Piston switchback acceleration and peak piston velocities are significantly higher with the 75 that any other 6g7. This makes the crank want to twist and bend as well as increases the effects rotating harmonics have on it. Contrary to what people think part of what makes a forged crank strong is it's ability to deflect to a certain extent without breaking or losing certain geometry.
While the 75 crank can take lots of pressure from the cylinders it is prone to flexing due to the outstanding geometry which puts excess stress on the main girdle and since Mitsubishi likes putting Chinese hardware in the 6g75 lower end the result is damaged components. Given fasteners that can handle the load and especially a good balance job the 75 takes abuse just fine. It is worth noting however that even those who push it's abilities aren't revving over even in mad built form without changing the geometry basically unless Ray Pampina get's involved.
Last edited by foxbrand; at AM. Advisable, yes. Necessary, probably not. I've had my 6G75 in my car for roughly 3 and a half years now with no issue. It's not lightly driven at all either. It has withstood constant abuse since the day it was swapped. Still running strong.Mitsubishi Motors has been focusing for a long time on technologies to control valve timing and amount of lift with the aim of achieving high power output, low fuel consumption, and low exhaust emissions.
The MIVEC engine was first used in in the Mirage, and since then Mitsubishi Motors has been adding a number of enhancements to produce an even better performance. In the Outlander launched inthe Delica D:5 and the Galant Fortis launched inMitsubishi Motors adopted a mechanism that continuously and optimally controls the intake and exhaust valve timing. Now, the all-new MIVEC engine controls both intake valve timing and amount of valve lift at the same time, all the time. It reduces pumping losses by adjusting the intake air volume by variating intake valve lift stroke as well as throttle valves, improving fuel efficiency.
Moreover, the all-new MIVEC engine improves fuel consumption due to other factors, including improvement of combustion stability through optimization of the combustion chamber structure and reduction of friction through optimization of the piston structure. With a conventional gasoline engine, the intake air volume is controlled by a throttle valve, increasing the air intake resistance when a piston descends.
The all-new continuously-variable valve system make valve lift stroke, the length of valve-opening time and valve opening timing continuously and simultaneously variable through a control shaft see figure below. With this mechanical interlock structure, cooperative control of hydraulic variable valve timing phase system becomes unnecessary. The all-new variable-valve structure simply adds an oscillating cam, a support shaft, and a center rocker arm to the conventional SOHC's rotating cam, rocker arm and rocker shaft.
The range of motion of the oscillating cam is made continuously variable by moving the fulcrum position of the center rocker arm through rotation of the control shaft intake rocker shaft by an electric motor. The 4B1 MIVEC engine series used in the Outlander as well as the Japanese-market Delica D:5 and Galant Fortis models uses the continuously variable intake and exhaust valve timing MIVEC system that continuously and optimally controls the intake and exhaust valve timing according to engine running conditions.
This system delivers high performance and fuel efficiency. Continuously controlling the intake cam and exhaust cams independently, this system provides a combination of maximum power output, high fuel efficiency, and a high level of environmental performance by making possible more precise valve control according to RPM and engine load than intake-only systems.
The MIVEC engine used in "Mirage" model uses the continuously variable intake valve timing MIVEC system that continuously and optimally controls the intake valve timing according to engine running conditions.
Mitsubishi 6G7 engine
It was installed with two valves per cylinder, and used Mitsubishi's ECI-Multi multiple port fuel injection fuel delivery system. The compression ratio was 8. A supercharger was installed and exclusive to the Debonair. The compression ratio for the supercharged model is 8.
The 6G71 engine was also converted to run on LPGa version which was only available to the Debonair and mainly intended for commercial taxi use.
The Mitsubishi models were with a 3. Turbo chargers were built by Mitsubishi. The 6G73 is a valve SOHC design with two valves running off a single cam lobe on the exhaust valves using a forked rocker arm and each intake valve actuated with two cam lobes, with a smaller bore than the 3.
Bore and stroke are The engine has low-profile cast aluminum heads which help it to fit into compact engine bays, while pent-roof combustion chambers increase efficiency and make room for four valves per cylinder, arranged in a cross-flow pattern with a "tumble" intake port for both strong breathing and low emissions.
Spark plugs are centered in the combustion chambers. A toothed timing belt is used. It uses Multi-port fuel injection and uses forged steel connecting rods. The gasoline direct injection version of the 6G74 was launched in April as the first GDI V6 engine ever produced. It differed from the basic 6G74 in many ways apart from its unique fuel injection system — it had a crown-curved rather than flat piston head, upright intake ports rather than angled, and a Mitsubishi claimed 30 percent better fuel economy, a 30 percent reduction in emissions, and higher power outputs than diesels.
In the interest of durability, the pistons are high-pressure castings attached to forged steel connecting rods that swing from a heat-treated forged steel crankshaft.
From Wikipedia, the free encyclopedia.
Automobil Revue in German and French. Berne, Switzerland: Hallwag AG. Archived from the original on Retrieved Allpar, LLC. Mitsubishi Motors technologies. Categories : Mitsubishi Motors engines V6 engines Gasoline engines by model. Namespaces Article Talk.I undid the top bolts on mine with a universal joint. Search Statistics User Listing. You are logged in as a guest. Removing 6G75 V6 engine from Mitsubishi Jump to page : 1 Now viewing page 1 [10 messages per page].
View previous thread :: View next thread. Message format Flat Threaded Nested. Hints:- Some useful pre advice Disconnect the battery and remove it from the car. Start with as little fuel in the car as possible. Remove the entire exhaust system inc manifolds right up to the start of the floor tunnel Then the exhaust manifold heat shields with 12mm bolts 3 on each cover need to be removed Remove both exhaust manifolds and precats, the manifold uses 14mm nuts to the heads, you will need triple extensions on the firewall side and maybe a universal joint There may be a requirement for removing the oxygen sensors unless you are a contortionist You will need a big 32mm socket to take the driveshaft nut off, and a new split pin when refitting.
You MUST remove the drivers' side driveshaft, first remove the two 14mm bolts holding the support to the engine block Just pull the driveshaft out by rotating it gently, only a small amount of trans fluid will ooze out, nothing to worry about.
Do not pull the driveshaft out from the far end It is impossible to access the two upper 17mm bell housing bolts without undoing 5 bolts on the water pump neck extension pipe These bolts are the ones that hold the water pump extension housing to head.
Mitsubishi 6G72 engine factory workshop and repair manual download
In particular is one that fastens the shaft that goes through the "V" to the T section. You must remove that because there isn't enough room to remove the entire pipe. Put a block of wood under the sump just before you start undoing bell housing bolts and engine mount. If not prepare for grazed knuckles and unnecessary difficulty a engine comes out the top very easily, first remove the bonnet Attach your engine crane and leveller bar, but do not jack up yet Confirm that all accessory hoses and pipes are seperated from the car, in particular the two heater hoses ain the battery area.
Undo all the top bell housing bolts, they are all 17mm. Put one 17mm bolt back in finger tight just above where the starter motor sits, you have removed the drive plate bolts and harmonic balancer havent you? Remove all the lower 14mm bell housing boltsSearch titles only. Search Advanced search…. Four Wheel Drive. Camper And Trailer.
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It is not long for this world and I'm looking at options for used engines. Maybe I can get a low milage Endevour engine and treat it basically as a used long-block and swap over my running gear and be on my way.
Gen III 6G75 Engine Interchangability
But, I don't know if Mitsu used a different cam, or other internals in the 6g75 engines depending on application. It would make some sense for them to do so, but does anyone know if they did or have a history of doing so? As I said this is probably a long-shot that anyone has checked or knows this, but I figured I'd ask. Also, if you happen to know of a good engine rebuilder in the Southern California orange county or not far area let me know?
Toasty Looking for that thing i just had in my hand The others are transverse so there will be work involved bosses and brackets but they are the same motors, It's been done with 3. The Eclipse is very different however, would be a killer swap if you had the electrical knowledge. This would also be a transverse to longitudinal swap as well The prices are so much cheaper for one of these used engines that I'm wondering if it may be worth it just in parts to use to rebuild my engine, crank, cams etc.
Unfortunately, I don't have the space to do a rebuild myself right now.