Wanted info on Cummins 6BT

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31 May 2013 07:15 - 31 May 2013 07:18 #41 by outyonda
outyonda replied the topic: Wanted info on Cummins 6BT
2 cylnders longer" front diff clearence ?
The old Perk hangs below the chassi,
not mutch clearence to the diff,
When you bottem out with a 6 cyl? diff / sunp clearance.
Could be a problem.
Brett

OKAs 091, 093, 094, 113, 346x6 & 405
Last Edit: 31 May 2013 07:18 by outyonda.

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31 May 2013 08:43 - 31 May 2013 10:02 #42 by PeteFox
PeteFox replied the topic: Wanted info on Cummins 6BT

Peter Davis wrote: One question, has anyone got an engineering certificate for their new engine?
Peter


Good question, but I don't think there will be many "yes" answers out there.

Pete Fox OKA266 MultiCab
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Last Edit: 31 May 2013 10:02 by PeteFox.

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31 May 2013 11:59 #43 by deedy
deedy replied the topic: Wanted info on Cummins 6BT
20-40mm more clearance than the perkins. The sump is shaped diferent. Plenty of room at the front of engine to take off fan. It has 20mm more clearance than my Landcruiser.

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31 May 2013 14:19 - 31 May 2013 15:17 #44 by OKABloke
OKABloke replied the topic: Wanted info on Cummins 6BT
Re: One question, has anyone got an engineering certificate for their new engine?

Yes, Fully Comply to the following:
Engine, Gearbox, Transfer Box, Wheel base and Chassis Extension, Seating, and for 305/70r19.5 Tyres

For Sale:
XT and LT Parts and Service Manuals Available on CD. $150.00 Delivered
### OKA Manuals Now Available as a Download ###.

20mm Spring Hanger Pin Upgrade Kits.

David
Last Edit: 31 May 2013 15:17 by OKABloke.

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31 May 2013 20:16 #45 by Alister McBride
Alister McBride replied the topic: Wanted info on Cummins 6BT
David (Hallandil), did you end up needing to do a brake upgrade to be certified with the upgrade?
Cheers, Alister

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01 Jun 2013 09:10 #46 by OKABloke
OKABloke replied the topic: Wanted info on Cummins 6BT
The Brakes were not an issue when it came to the compliance, I believe brakes are done on the weight of the vehicle not the drive train

For Sale:
XT and LT Parts and Service Manuals Available on CD. $150.00 Delivered
### OKA Manuals Now Available as a Download ###.

20mm Spring Hanger Pin Upgrade Kits.

David

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08 Jun 2013 08:04 #47 by deedy
deedy replied the topic: Wanted info on Cummins 6BT
Oka is now engineered for cummins engine. Engineer was impressed. Front axle was no problem and brakes passed emergency brake test. Next step will be dana 80s front and rear.

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09 Jun 2013 07:36 #48 by John and Lis
John and Lis replied the topic: Wanted info on Cummins 6BT
One question, has anyone got an engineering certificate for their new engine?
Peter


We completed our 6BT engine upgrade along with numerous other things including 80 series diffs front and rear, handbrake upgrade, (the handbrake will stall the old Perkins and the 6BT in 1st gear low range), tyre and wheel change to 325/85 R16, etc., etc.,over a year ago and everything has been inspected and approved under Queensland registration requirements, and is fully legal and insurable. (Known as Blue Tag in Qld). I do keep a copy of the documents in the truck for when a curious patrol officer pulls me up to have a chat and look over the truck. (happened twice now, no tickets issued, just wanted to have a look and make sure I had a truck License)
The engine fit is actually the easiest part and basically drops straight in. The front engine mounts are almost perfectly in line and only need a very small modification. The rear mount is off the gearbox and din't need to be altered.
The little things like water and exhaust changes will take longer than fitting the engine. Clearance on the diff is actually better than the Perkins 4l engine.
Engine power is everything you could ask for unless you have special needs or desires. I can pass a triple road train as easily as I can in my Camry, and it drives just like a car on the open road. At the lights it is a bit slow when fully loaded,(5.4ton) but still much better than it used to be. Basically, it is now a good performing truck that drives like a car. Fuel usage this last 12 months has averaged around 5.4km/liter but that has been mainly highway and gravel road with probably 10% heavy going in sand. .
The following user(s) said Thank You: Joseph Baz, deedy

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15 Mar 2014 20:13 #49 by Outback Jack
Outback Jack replied the topic: Wanted info on Cummins 6BT
Any updates on conversions mentioned here?

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18 Apr 2014 19:14 #50 by Outback Jack
Outback Jack replied the topic: Wanted info on Cummins 6BT
I am not sure if we can do a poll on this forum.

But it would appear Cummins is the engine of choice so far.

I think there is 2 or 3 Duramaxs,, Isuzu as mentioned in this post.

Doc has 3 P400 I think.

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18 Apr 2014 19:31 #51 by Joseph Baz
Joseph Baz replied the topic: Wanted info on Cummins 6BT
Lobo,it all depends on how simple do you want the conversion to be,IMO is no point in using a 1 cable engine while you have an electronically controlled transmission,I think the best chance of survival is to opt for gear that is available off the shelf,once you get into the one off or customize to your needs you will run the risk of being stuck big time if you have a failure in the bush,Certanly for me Cummins /Allison are my preference,I'm talking ISB Cummins,sure it's an electronically controlled engine but all the parts are available off the shelf,for instance if you have a 6BT with a Allison you are dependent of an after market supplier for the TCM to couple the two,so if you're to convert with something electronic just go with the proven reliable,Many people will disagree but that is why this world is such a beautiful place.
Cheers,Joe
The following user(s) said Thank You: Hal Harvey

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19 Apr 2014 09:15 #52 by Hal Harvey
Hal Harvey replied the topic: Wanted info on Cummins 6BT

Peter Davis wrote: One question, has anyone got an engineering certificate for their new engine? And if so did they need to make changes to the front axle and/or brakes to accommodate the extra weight and power?
Peter


Finally completed my engineering and modified registration in WA this week with the Duramax. No changes to front axle or brakes. All approved with turbo, auto, and an increase in seating capacity from two to six. Passed first go and as others have indicated, the new engine was probably the easiest part of the whole approval exercise.

Principal advisor to the Minister for Tourism, Liza Harvey MLA
... OKA 260 ... "I'm not leaving any sooner than I have to!"
www.byles.net/OLDportal/members-vehicles-public/5-oka-260

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19 Apr 2014 09:58 #53 by Outback Jack
Outback Jack replied the topic: Wanted info on Cummins 6BT
I will have to live with the Perkins for several more years.

But think the Cummins seems the best option, ISB or previous.

Only concern is the cummins is over 500kilos I think, not sure what the Perkins is.

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19 Apr 2014 15:15 #54 by Peter and Sandra OKA 374
Peter and Sandra OKA 374 replied the topic: Wanted info on Cummins 6BT
Cummins 5.9 6bt is about 100kg increase over the Perkins, not sure about the later versions, it doesn't seem to be a problem in the ones already converted. I got rid of 80kgs when I swapped the AGM batteries for Lithiums so am not worried about the extra engine weight, reckon the extra 130hp should have no problem moving it either.

OKA 374 LT Van, converted to camper/motorhome,
400ah Lithiums, 1100w solar, diesel cooking heating and HWS,
Cummins 6BT, Allison 6 speed auto, Nissan transfer.

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19 Apr 2014 16:53 #55 by Paul Scherek
Paul Scherek replied the topic: Wanted info on Cummins 6BT

Peter and Sandra James OKA 374 wrote: Cummins 5.9 6bt is about 100kg increase over the Perkins, not sure about the later versions, it doesn't seem to be a problem in the ones already converted. I got rid of 80kgs when I swapped the AGM batteries for Lithiums so am not worried about the extra engine weight, reckon the extra 130hp should have no problem moving it either.


G'day Peter, Does this mean that you are doing the 6BT conversion? With your auto, this will be a giant killer. Good stuff!
Cheers,
Paul

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21 Apr 2014 06:16 #56 by Peter and Sandra OKA 374
Peter and Sandra OKA 374 replied the topic: Wanted info on Cummins 6BT
Yes eventually ;-))) engine is pretty much ready to drop in but house and other stuff has to sorted first, probably towards the end of the year.

OKA 374 LT Van, converted to camper/motorhome,
400ah Lithiums, 1100w solar, diesel cooking heating and HWS,
Cummins 6BT, Allison 6 speed auto, Nissan transfer.

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02 May 2014 18:50 #57 by Russ Phelan
Russ Phelan replied the topic: Wanted info on Cummins 6BT

Outback Jack wrote: Any updates on conversions mentioned here?


I have made a start. Well sort of. Just collecting all the bits and pieces at the moment.
Question: Is the engine lowered by sticking a crane of some sort in thru the front door and using a chain block to lower it?
Is it best to remove the gearbox first? or lower the lot at once?

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02 May 2014 18:58 #58 by Outback Jack
Outback Jack replied the topic: Wanted info on Cummins 6BT
I think some have taking off the diff/springs and installed it that way.

Brett normally takes the cab halve off I think

Cab off would be the easist, not sure how long it takes.

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02 May 2014 20:18 #59 by Peter and Sandra OKA 374
Peter and Sandra OKA 374 replied the topic: Wanted info on Cummins 6BT
Remove the passengers front door.
Remove the front seats, engine bay side covers and hatch.
Remove the front protector plate (big sloping thing in front of diff housing)
Remove the transmission and transfer case.
Remove the front diff housing.
Either use the forklift or engine hoist in through the passengers doorway to drop the engine down onto a pallet on the floor.
Lift the Oka up out of the way, it is sitting on the 4 post hoist ;-))
Roll the Perky out of the way with pallet truck and roll the Cummins back in on another pallet.
With the front diff housing removed it will be much easier to sort out the cooling system and exhaust connections along with all the myriad of other things to do to get the Cummins to fit ;-)))

OKA 374 LT Van, converted to camper/motorhome,
400ah Lithiums, 1100w solar, diesel cooking heating and HWS,
Cummins 6BT, Allison 6 speed auto, Nissan transfer.

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02 May 2014 22:17 - 02 May 2014 22:22 #60 by outyonda
outyonda replied the topic: Wanted info on Cummins 6BT

Peter and Sandra James OKA 374 wrote: Remove the passengers front door.
Remove the front seats, engine bay side covers and hatch.
Remove the front protector plate (big sloping thing in front of diff housing)
Remove the transmission and transfer case.
Remove the front diff housing.
Either use the forklift or engine hoist in through the passengers doorway to drop the engine down onto a pallet on the floor.
Lift the Oka up out of the way, it is sitting on the 4 post hoist ;-))
Roll the Perky out of the way with pallet truck and roll the Cummins back in on another pallet.
With the front diff housing removed it will be much easier to sort out the cooling system and exhaust connections along with all the myriad of other things to do to get the Cummins to fit ;-)))


sounds like hard yakka!!!

take bull bar off
4 cab bolts
A few wires, cables, hoses & the cab is out of the way
A couple of hours, takes more to unbolt "U" bolt's

EASY

what dose the W/Shop manual say
last time I looked it said cab off to do turbo
cab off to change spark plugs ect ect

OKAs 091, 093, 094, 113, 346x6 & 405
Last Edit: 02 May 2014 22:22 by outyonda.

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