BJ73 3b to 1HZ conversion

Convert or no?

  • Yes

    Votes: 4 57.1%
  • No

    Votes: 3 42.9%

  • Total voters
    7
Joined
Dec 10, 2016
Messages
255
Location
New Zealand
Here you go.... This is the same hill , same tyres and gear ratio ... 4th gear pull up the same hill
The truck is my 75 with a 3bii , and then a 15b.... The other one is my pzj 70 with headers which is very comparable too a 1hz in your 73 ....( IGNORE THE SPEEDO IN THE 75 )
3B
1pz
15b
5 March 2017
 
Last edited:
Joined
Dec 10, 2016
Messages
255
Location
New Zealand
A 14 or 15b or 13bt would be by far the easyest and most reliable swap.... You could probably swap your 1hz for one quite easilly in your part of the world ... The big Bs pull like school boys and are just big dumb basic motors the will last a life time if you feed them clean oil , diesel , and air.......
15B-F/FT/FTE engine conversions
 
Joined
Jul 22, 2003
Messages
17,690
Location
Perth Western Australia
 
 
 
I liked my 1HZ conversion into my FJ73. The engine was fully rebuilt with a rebuilt pump and injectors, it was quite zippy with 31 or 32 inch tyres. But if you are starting with a B powered landcruiser it will be cheaper and easier to stick a larger B engine in there. If I was going to get a 6cyl, I might use a 1HD T. Its all about the budget.
 
Joined
Dec 10, 2016
Messages
255
Location
New Zealand
Yup , its amazing what can be achieved with lotsa money and a good imagenation , but for most cruiser owners its not always an option . Id love a 15bt , but i dont like breaking stuff and i hate a cluttered up engine bay.
What i have now does everything i could ever hope for and more .
 
Joined
May 16, 2008
Messages
1,320
 
 
1. Remove head.

2. Take to machine shop for valve job and testing for cracks.
If no cracks, reuse. If cracks, either have cracks fixed or replace with new head.

3. Replace pre-combustion chambers.

4. Put head back on with new MLS head gasket.

Drive happily at 55mph.

Done.
Hello,

x2.

You might want to add a turbo.







Juan
 

Onur

16711-58020
Moderator
GOLD Star
Joined
Aug 28, 2004
Messages
27,607
Location
Woodstock, NY USA
 
 
 
One thing that should be considered and has thus far been omitted from this discussion is parts availability going forward. I'm no expert but I'm assuming that some 3B parts might be scarce in the not so distant future.
Not really.
 
Joined
Dec 10, 2016
Messages
255
Location
New Zealand
Today we buy parts from all over the world , and 3b engines are everywhere . Late 3b h55f input shafts (cheep ) are another story though
 
Joined
Sep 27, 2009
Messages
254
Location
N.B., Canada (east coast)
 
I've had many of both here. 1HZ is more powerful, quieter, smoother and better layout, (no brake booster pump running off alternator)
I found LJ73 with turbo and BJ73 without were about the same. I have a 5 speed HDJ81 now and it's a rocket up to 100km/h compared to the rest.
 
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