6BT/4BT question

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Are they any good? comparable to Toyota diesel engines? Or just cheaper?
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I've owned both, although anything I've had with a 4BT has been in backhoes.
I think the Cummins has the edge as far as durability and longevity.
It's just there will be more noise and vibration with the Cummins.
The Toyota has a wider more suitable powerband for automotive use.
 
polarweasel said:
And 4Lo 1st is pretty damned impressive at idle with that big 7.3L diesel grinding away. :)
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I have one of my best friends here with this engine ..

julio.jpg


Very impresive .. stock, now with a aftermarket turbo is really awesome .!
 
iron_giant said:
I'd have to say that it comes down to cost and parts as well. You can source a great 4bt for 1500-2000, whereas the 1hz's run 4000.00 and up. You've got to make/ weld in mounts for both of them, both have a great 5sp and auto option, and labor seems comparable. That said, anyone who has ever seen and heard the motors next to eachother (as I know most of you have) would probably go 1hz/ 1hdt for the sheer differences in sound and vibration. I have to agree with Sheldon that, while the cummins motors excel at what they are designed for, most of us drive our cruisers on a regular basis and the toyota diesels might be easier to live with.
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i can see where people would want a nice quite engine but for me the sound of a big diesel like the cummins....i love it, if they can hear you commen a mile away all the better the jeeps will be off the trail by the time i get there then!:flipoff2:
 
HHHmmmm noisey diesel..


Just seen a ton of bread van diesels on Canadatrader.com go into heavy trucks then search brands. Grummen was one brand.

lot's of 1985's and newer on there. Wonder of one of those would make a good RV conversion? Anyone think they could pimped out?
 
depends on how big of a rv you want....theres alot of space in the back of those suckers....at work we have one and its basicly a mobile carpentry shop minus a power supply....but it would probably make a resonable rv
 
That..................would be me ;) I put a 1HZ into my 45 "troopie"
And..........I have a 4bT in my, well my wife's FJ80.

I like both of the diesels. The 1HZ is quiet and I love the torque of the big 6 but I love the rattle of the 4BT as well. The Cummins is not that loud in my opiniion. I get a lot of heads turning when I pull up in the 80.

Each to their own. They each have their places, that is why I have both :)
 
I was going to say the same thing. The 6 cyl cummins (and the Isuzus), from everything I know, fit in with 2-3" lift. The 4BT needs larger lift so it does not hit the front axle. You have more room to move them around. I think if you put it all the way back to the firewall like you have to with the 6 cyls, you can probably get away with a smaller lift with the 4BT would be my guess but it would have to be excellently placed and the shifter hole would have to be moved back.

hks3sgte said:
Looks like this guy did the 6BT swap into his Fj60 with a spring under...

http://cgi.ebay.com/ebaymotors/1987...oryZ6443QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
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brownbear said:
I think thats a nice looking cruiser. Be a good buy for sure. Wonder though what the reserve is?

Is that anyones on here?
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Is now ...

So my New Years resolution was to not buy another Crusier ...

Well I failed *big* time ...

Sigh ... there is help isn't there ?

Big smile from ear to ear ...

Cahil
 
70sguy said:
I wonder what the implications of the weight of tht 6B-T are on the front axle housing. They are known to bend even under the load of the 2H, take out inner axle seals and wear deep grooves in the seal surface on the axle shafts.
I think the cummins motors are great but I'd sooner use one to pull a cruiser than power one.
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I don't think what you heard is correct, if that were the case than Toyota would not put the same axle in 60 series that come with 2H, it must be urban legenc or the one guy who had this problem had issues for other reasons.
 
hks3sgte said:
So.... how's it like? :)
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First *big* diesel ... ;p

I have another diesel conversion in progress using a Mercedes inline 5 turbo diesel. Project is taking longer than expected. That enine is a twinky compared to the 6BT.

Still getting use to it. Boy oh boy is that a big engine. Barely fits in the engine compartment. Noisy but that doesn't bother me and way torqey on the low end. I'm taking it real easy until I swap all the fluids out. The 5th gear input bearing (typical NV4500) needs to be replaces so I won't be doing anything exciting until that's done. Averaging ~ 20 mpg. Valves probably need to be adjusting and will also check the timing. I'm learning bunches.

Was able to check the vehicle out before close of auction and it was very impressive. I have some idea how pricey these conversions can go so I was very interested in aquiring this truck. The conversion was a good job. Some of the guages are not working correctly and that will take a bit of time to correct. The easy part always seems to be getting the mechanical (engine stuff) done. Hooking up all the other stuff is where it gets tricky and long.

:bounce2:

Cahil

P.S. For early 6BT definitely need to address the 'kill dowel problem' or pricey repair bill. Your choice.
 
Info on importing HZJ75RP-MRN

Hi, my name is Piero, I live in South Africa and am in the process of imegrating to USA, as my children live in New Jeresy & Knoxville TN. I want to import my Crusre (R.H. drive) Diesel. This is my safari rig and it goes where I go !!!. So if any one can give me the info to bring it with me.
 
Cummins makes one of the best Diesel engines out there.. they are not called the "Million Mile" engine for nothing. Parts are much easier to come by. and they have dealers everywhere, Ive even seen dealerships in Mexico.
They are also cheaper to swap out than the toyota, and you dont have to mess with computers if you go with the 12valve. They are a little more noisy, but you can quiet them down a little by upgrading the turbo, or increasing the boost.
Weight wise, there is only about 200-300 lbs difference between the 6bt and the yota. Thats about the same difference when you add a bumper, winch, 2 batteries, arb compressor, etc. and no one upgrades thier springs for that.,
I think you would be fine with a 2-4" lift with heavy duty springs in the front if your worried about the extra weight. but the Engine is at least 3" taller than the toyota. and 3" longer with out the fan and pulley.

It seams as if the chevy is an easyer swap because of the avi. of adapters to do the swap and keep your existing drive train. Its just the older chevy diesels are not reliable.

Im doing a 6bt Cummins diesel swap in an FZJ80.
Im just waiting on axles so I can button everything back up.

-Ron
 
Project FJ80 said:
Im doing a 6bt Cummins diesel swap in an FZJ80.
Im just waiting on axles so I can button everything back up.

-Ron
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SWEET ...

Ron, Love to see it when your done. To bad I'm on on the east coast. Best of luck with the swap.

:beer:

Cahil
 
chajazz said:
so every one is puting and convertings is doing a conversion with a fj60 or 80. has anyone played with a fj40. what vehical do you find a 4bt? chev, or gmc step van all i find is v8's
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I'm thinking about doing a Mercedes 3 liter 5 cylinder turbo diesel conversion to a FJ40 but just have to many ongoing projects to complete first. Then we'll get to that one.

4x4 Labs seems to have and the adapter for that conversion ... :idea:

4BT's were found in some bread trucks, P30 trucks, and a few others. Rare but findeable.

Cahil
 
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