Author Topic: 6G75 Timing Belt Change  (Read 12691 times)

Kevin_Slark

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6G75 Timing Belt Change
« on: January 24, 2018, 10:12:47 AM »
Okay, it's almost time to change the whole system on the '06. Is 70k the actual interval for these motors?

I need the Aisin TKM-005 kit and OEM tensioner for sure.

Plus, it's advisable to do the water pipe o-rings, camshaft seals, crank pulley bolt, and crank seal while I'm in there, right?

I think this needs to be a Gen 3 wiki article...

PajEvo

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Re: 6G75 Timing Belt Change
« Reply #1 on: January 24, 2018, 05:59:02 PM »
60k is my understanding. I'd do idlers too.

As for the kit, I had TKM 005, not 007. Double check our numbers. Maybe we are both right? Maybe not.

If you're doing WP, maybe take the extra few minutes and do a stat too. I also did hoses same time because they were the originals. Also all accessory belts, since they were off. Old ones as spares.

Kevin_Slark

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Re: 6G75 Timing Belt Change
« Reply #2 on: January 27, 2018, 11:44:23 AM »
Thanks, Phil.

Per Aisin aftermarket, all the Gen 3 6G74's and 75's use TKM-005. I just double checked. That still seems odd to me.

Are you referring to the timing idlers? They're included in TKM-005. Some versions of this kit seem to include a NTN tensioner, which I understand is OEM. Does anyone have any experience with this?

Good call on the thermostat, its age and condition are currently unknown.

The current serpentine belt is a Dayco installed in 2016, it looks mint still.

ChargerX3

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Re: 6G75 Timing Belt Change
« Reply #3 on: January 27, 2018, 08:29:05 PM »
I thought it was 90-100k on the newer blocks. Something about the belt construction being improved.

RaptorReed

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Re: 6G75 Timing Belt Change
« Reply #4 on: January 27, 2018, 10:34:22 PM »
Water pump should be done as well, if not now I personally wouldn't let it go past 90k on a interval. I have seen a 3.5l destroy two pumps when hitting 115k and another 120k miles later. Last owner on the 98 I had, pump seized and the pulley exploded like a frag grenade is the best way to describe things when I pulled the timing covers off. WP pulley shrapnel wedged under the crank sprocket, belt melted to cam gears and every other pulley, belt shredded.
Tim
1994 Monterp SR
1992 Galant VR-4
1988 Starion
1976 Colt Galant

TOASTY

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Re: 6G75 Timing Belt Change
« Reply #5 on: January 30, 2018, 08:15:18 PM »
 Clay had his water pump seize at a short interval as well.

haolepinoy

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Re: 6G75 Timing Belt Change
« Reply #6 on: January 31, 2018, 06:30:44 PM »
The Aisin TKM-005 kit comes with a water pump. The kit doesn't include a timing belt tensioner. If you replace it use OEM. A friend in Florida lost an engine after using the DAYCO from RockAuto.

You'll need a timing belt tensioner pulley pin tool (and a micrometer and inch-lb. torque wrench) to set the tensioner properly (Harbor Freight has a decent micrometer for $10 and the pin tool I used I found on Amazon for $10...EWKtool EB0009).

Definitely do the bolt and washer (1100A141 and MR994412). I used the OTC Stinger Pulley Holder tool (OTC 4754 - $58 on Amazon) to reinstall the crank, but had to use the starter bump trick to get the original bolt off. You can fab up a tool for cheaper...search the forums for the easy how-to. Be careful removing the crank pulley itself since it might be seized to the crank gear due to the roll pin being rusty...mine came out together and I broke my Crank Position Sensor in the process.

I bought a Aisin thermostat from RockAuto.com when I did my timing job. It was identical to the thermostat it replaced...but I can't say 100% that it was the OEM stat since I'm like the 27th owner of the vehicle.

Might want to replace or refurb your alternator while you're in there, especially if it's oil soaked.

If you're going deeper into seal replacement than just the cam seals and valve covers I recommend getting the Overhaul Set from Mitsubishi (MD979167 - $286.98 when I bought it) rather than buying each thing individually to save some coin...but if you're going that deep you're not going to be saving much coin or time. I fell down the rabbit hole.

If you do the valve cover gaskets...DO NOT OVER-TIGHTEN THEM! You almost do not even have to use a ratchet since the torque specs are so light. I hand-tightened the screws and then gave them about a quarter turn more with my 1/4" ratchet.
'03 Montero Limited - being repaired slightly faster than it's falling apart (debatable)

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d_man_dennis

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Re: 6G75 Timing Belt Change
« Reply #7 on: February 28, 2018, 11:27:00 AM »
I am Dennis from Taiwan! I had a set of suspension and some parts from ADD. And I love them! Josh and Adam send me here to meet you all experts on Montero.
I need help!
I have 2004 Montero 3.8 with 6G75. I love it and wanna keep it for a long time! It has 90k KM on it now, it is about time to do a timing belt job. I read thru our forum and other places, Plus a little study and come up with a list. I am still learning about our trucks, Please help me if I am doing too much, too less or I am missing some parts.

A. I will get this (or I should buy these OEM part separately?)
Aisin TKM-005 Engine Timing Belt Kit with New Water Pump (itís without Tensioner?) https://www.amazon.com/Aisin-TKM-005-Engine-Timing-Water/dp/B00HFKEMRA

TKM-005 should include these?
1.   Timing Belt (it is either Mitsuboshi or Gates ?)
Are these good quality belts?
-OEM Part # MD358549

2. Aisin Water Pump
-Part # MD979171 includes gasket currently https://www.ebay.com/itm/AISIN-Water-Pump-MD979171-/361770723887

3. Idler Pulley x2
a. Part # MD319022
https://www.ebay.com/itm/Pulley-Idler-Timing-Belt-FEBEST-0488-V97W-OEM-MD319022-/222332192685
b. part #:MD140071
https://www.ebay.com/itm/Mitsubishi-OEM-Timing-Belt-Pulley-MD-140071-/192182602509?hash=item2cbef9cb0d:g:rr8AAOSw-3FZEgpq

B. I still needs:
1. Timing Belt Tensioner -Part # MD362861
https://www.ebay.com/itm/MD362861-Genuine-Mitsubishi-ADJUSTER-TIMING-BELT-TENSN-/182717633191

2. Crankshaft Pulley Bolt -Part # 1100A141,
https://www.amazon.com/MITSUBISHI-1100A141-GENUINE-ORIGINAL-CRANKSHAFT/dp/B005HAP1VQ

3. Washer -Part #MR994412
https://www.ebay.com/itm/MITSUBISHI-MULTIPLE-MODELS-CRANKSHAFT-PULLEY-WASHER-OEM-MR994412-/291471416820

4. CRANKSHAFT POSITION SENSOR Montero; 3.8L ( Is this necessary?)
-Part # MD357274
https://www.ebay.com/itm/New-Crankshaft-Crank-Position-Sensor-For-Mitsubishi-Montero-MD357274-PC542-/180890213111

5. CAMSHAFT POSITION SENSOR Montero; 3.8L ( Is this necessary?)
-Part # MD360196
https://www.ebay.com/itm/Crankshaft-Position-Sensor-For-Mitsubishi-Eclipse-Galant-Stratus-MD360196-New-/152163335174

6. Aisin thermostat
https://www.amazon.com/Aisin-THM-011-AISIN-Thermostat/dp/B01LZ89OWN/ref=au_as_r?_encoding=UTF8&Make=Mitsubishi%7C72&Model=Montero%7C936&Year=2004%7C2004&ie=UTF8&n=15684181&newVehicle=1&s=automotive&vehicleId=1&vehicleType=automotive


C. I would like to do the seals and gasket too, I will get this overhaul set (thank you haolepinoy)
Is this the correct part for me?
Mitsubishi MD979471, Engine Full Gaskets
https://www.amazon.com/Mitsubishi-MD979471-Engine-Full-Gasket/dp/B00KWFIERO/ref=sr_1_2?s=automotive&ie=UTF8&qid=1519839267&vehicle=2004-72-936------------1-0&sr=1-2&ymm=2004%3Amitsubishi%3Amontero

Does above set have all these?
1. Valve Cover Gaskets (need 2)
-# MD303148
https://www.ebay.com/itm/MITSUBISHI-OEM-97-04-Montero-Sport-Valve-Cover-Gasket-MD303148-/271900175439

2. intake manifold gasket need 2
-#MR561678
https://www.ebay.com/itm/Mitsubishi-Diamante-Engine-Intake-Manifold-Gasket-MR561678-Stone-/111191918531

3. PLENUM GASKET Montero; 3.8L; Upper; Left need 1
-Part # MR561581
www.ebay.com/itm/New-Stone-Fuel-Injection-Plenum-Gasket-Left-Upper-MR561581-Mitsubishi-Montero-/281738166135

4. PLENUM GASKET Montero; 3.8L; Upper; Right
-Part # MR561582
https://www.ebay.com/itm/Right-Upper-Mitsubishi-Montero-Fuel-Injection-Plenum-Gasket-Stone-MR561582/112421728506?epid=729759634&hash=item1a2cdb70fa:g:HC0AAOSwYlJW3IRu&vxp=mtr

5. PLENUM GASKET Montero; 3.8L; Lower
-Part # MR561584
https://www.ebay.com/p/Mitsubishi-OEM-MR561584-Fuel-Injection-Plenum-Gasket/1222093161?iid=182717634817

6. Cam Seal if leaking need 2
-# MD372536
https://www.ebay.com/p/Engine-Camshaft-Seal-Mopar-MD372536/84086050?iid=263025693809


Thanks for your time to read thru this,
Montero is not a popular car in Taiwan . I canít get parts , even I do, they are super expensive or take forever time to get to me .
Also, I need to very careful about ordering stuffs from the states , because they all are going to be shipped to Taiwan, it will be hard for me to exchange or return things.
Wish you have a super day!!

haolepinoy

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Re: 6G75 Timing Belt Change
« Reply #8 on: February 28, 2018, 04:41:04 PM »
Hi Dennis. Wow, only 90k kms? That's just 56k miles in US-speak. That thing is almost brand new.

Aisin TKM-005 kit has the Mitsuboshi belt. I'm no belt expert, but I've heard "the internet" say it is good. The kit does not come with a tensioner.

I don't think you need the crank and cam sensors. Just be careful not to break the crank sensor when removing the harmonic balancer.

You have the correct part number for the Overhaul Gasket Set (MD979471) for your 2004. It is a different part number than the set I used for my 2003 (MD979167), but I have no idea how the two sets would be different. They are for the exact same engine, the 3.8L. The set contains everything you'll need to disassemble the top end of the engine down to the pistons...though, if you're not planning to remove your heads to do the head gaskets, exhaust manifolds, or valve stem seals you may be able to find a cheaper set or save some money by buying individual gaskets. If my Montero only had 56k miles on it I would not touch the heads unless I had a very good reason to.

Two gaskets those sets will not contain are the throttle body gasket and the egr gasket. I detached both from my intake plenum so that I could clean them.

Good luck and have fun.
'03 Montero Limited - being repaired slightly faster than it's falling apart (debatable)

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PajEvo

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Re: 6G75 Timing Belt Change
« Reply #9 on: February 28, 2018, 08:04:59 PM »
I've seen Mitsuboshi belts installed as original equipment, so you should be good there. Your list is extensive and comprehensive. You've done your homework!

You may want to look into the tool that holds the crank pulley while you remove and reinstall the crank bolt? I made one, but the genuine article would be better. There is also a special tool for setting the tensioner. I made that one too, but wished I had the real thing.

Beyond the tensioner, the crank bolt is the single most important thing to get perfect when you do this job. There are two schools of thought on retorquing the bolt.  One theory is to use thread locker on the bolt, to ensure it doesn't come loose. The other camp says follow the manual which suggests engine oil on the threads, in order to get the crank spec correct. Complete opposite approaches, both with merit. I used method number two on my Pajero Evolution and then two weeks later I drove it about 8k kms to California and back - it is still in place.

Cheers
Phil

d_man_dennis

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Re: 6G75 Timing Belt Change
« Reply #10 on: March 01, 2018, 10:14:13 AM »
Haolepinoy, you are right!! This Montero is almost brand new! I live right in the city and Taipei is a small city, everything is only about 3-4 miles away. it is my only car for past 14 years. I still didnít put too much mileage on it.
I m also confused about this part number for the Overhaul Gasket Set between 2003 vs 2004,
However, you said this car is new! I will get these seals and gasket individually to save some coins.

Phil, thank you for the informationís, they are very helpful! If my mechanic and I run into any problems, will come up here and get your help.

After the chatting with you guys,
I revised the list a bit, please help me if I am missing anything or doing it too much:)

1. Aisin TKM-005 Engine Timing Belt Kit with Mitsuboshi belt, New Aisin Water Pump , Idler Pulley x2 #MD319022+MD140071
 https://www.amazon.com/Aisin-TKM-005-Engine-Timing-Water/dp/B00HFKEMRA

2. Timing Belt Tensioner -Part # MD362861
https://www.amazon.com/Mitsubishi-MD362861-Engine-Timing-Tensioner/dp/B005HAP2M4

3. Crankshaft Pulley Bolt -Part # 1100A141,
https://www.amazon.com/MITSUBISHI-1100A141-GENUINE-ORIGINAL-CRANKSHAFT/dp/B005HAP1VQ

4. Washer -Part #MR994412
https://www.ebay.com/itm/MITSUBISHI-MULTIPLE-MODELS-CRANKSHAFT-PULLEY-WASHER-OEM-MR994412-/291471416820

5. Aisin thermostat
https://www.amazon.com/Aisin-THM-011-AISIN-Thermostat/dp/B01LZ89OWN/ref=au_as_r?_encoding=UTF8&Make=Mitsubishi%7C72&Model=Montero%7C936&Year=2004%7C2004&ie=UTF8&n=15684181&newVehicle=1&s=automotive&vehicleId=1&vehicleType=automotive

Seals and Gaskets
6. Valve Cover Gaskets (need 2)
-# MD303148
https://www.ebay.com/itm/MITSUBISHI-OEM-97-04-Montero-Sport-Valve-Cover-Gasket-MD303148-/271900175439

7. intake manifold gasket need 2
-#MR561678
https://www.ebay.com/itm/Mitsubishi-Diamante-Engine-Intake-Manifold-Gasket-MR561678-Stone-/111191918531

8. PLENUM GASKET Montero; 3.8L; Upper; Left need 1
-Part # MR561581
www.ebay.com/itm/New-Stone-Fuel-Injection-Plenum-Gasket-Left-Upper-MR561581-Mitsubishi-Montero-/281738166135

9. PLENUM GASKET Montero; 3.8L; Upper; Right  need 1
-Part # MR561582
https://www.ebay.com/itm/Right-Upper-Mitsubishi-Montero-Fuel-Injection-Plenum-Gasket-Stone-MR561582/112421728506?epid=729759634&hash=item1a2cdb70fa:g:HC0AAOSwYlJW3IRu&vxp=mtr

10. PLENUM GASKET Montero; 3.8L; Lower
-Part # MR561584
https://www.ebay.com/p/Mitsubishi-OEM-MR561584-Fuel-Injection-Plenum-Gasket/1222093161?iid=182717634817

11. Cam Seal if leaking need 2
-# MD372536
https://www.ebay.com/p/Engine-Camshaft-Seal-Mopar-MD372536/84086050?iid=263025693809


Thank you guys
Dennis

d_man_dennis

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Re: 6G75 Timing Belt Change
« Reply #11 on: March 05, 2018, 11:19:17 AM »
guys, please tell me what you think of this list......
thus, I can start ordering parts :)


thanks

Dennis

PajEvo

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Re: 6G75 Timing Belt Change
« Reply #12 on: March 06, 2018, 07:29:20 AM »
Looks good to me. Only thing else I'd add, which is not related to timing, is upper and lower rad hoses, since you'll be removing the rad anyway. If they haven't been done then now is the time. I'd also check the operation of the fan clutch, and the condition of all accessory belts too. I hate doing things twice.

Let us know how you make out!


PajEvo

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Re: 6G75 Timing Belt Change
« Reply #14 on: March 06, 2018, 11:18:32 PM »
I like oem for hoses but I don't know anything wrong with gates... probably fine. Acessories belt should be good too.