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4jh1 and 4jb1 difference for conversion kits.

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4jh1 and 4jb1 difference for conversion kits.

Postby nb422 » Wed Feb 11, 2015 5:43 pm

Hey guys. Im looking at putting a 3.8 ecotec engine into my mu as the engine is starting to have issues, and the v6 idea does have a nice sound to it..
Anyway i would like to keep it manual so am looking at a kit from australia. Only problem is the kit says it is for a 4jh1 but i have a 4jb1 manual and am aiming to use a 4jg2 mu manual box i have spare. What i need to know is are the engine mounts different between the two and will their supplied custom clutch and related parts work in my 4jg2 gearbox. Really dont want to spend upwards of 1.8k and find its wrong...
If this doesnt work out ill be going supercharged and auto instead haha but would love manual.

Cheers in advance
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Re: 4jh1 and 4jb1 difference for conversion kits.

Postby jellis » Thu Feb 12, 2015 10:32 am

http://www.rodshop.com.au/index.php/hol ... n-kit.html

ls1 for the win.
not sure about 4x4 though wouldnt be to hard to adapt a transer on the back of the t56
cheers, Josh
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Re: 4jh1 and 4jb1 difference for conversion kits.

Postby geeves » Thu Feb 12, 2015 1:39 pm

all the 4j series engines are based on the same block so mounts will be the same but not so lucky on the bell housing if that matters. 4jx1 4jj1 and 4jh1 have a different bellhousing pattern.
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: 4jh1 and 4jb1 difference for conversion kits.

Postby topgun94 » Thu Feb 12, 2015 1:40 pm

I would love to SAS my truck and run an LS1. So good.
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Re: 4jh1 and 4jb1 difference for conversion kits.

Postby nb422 » Thu Feb 12, 2015 2:52 pm

Damn i only wanted the kit really for the bellhousing adapter/clutch assembly... looks like auto it is.
I measured up to put a vn 5litre v8 in and for it to fit it would run from the firewall and the pulleys would just be where short of the back of the a/c radiator.. still considering this option and moving the radiator forward to in between a custom bar ill get made and in front of where the a/c rad used to sit... budgets about 7k shy of an ls1 unfortunately :(
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Posts: 213
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Age: 17
Country: New Zealand
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Vehicle: 1993 Isuzu MU 4jb1 EGR Blocked, Free flow exhaust, 33x12.5 Mudstars on 15x10s. 32x10.5r16 on 15x8 -44.
Spring over axle, winch bar, 50mm bodylift, balljoint flip. Exo cage soon to come. Fully certified even.

Re: 4jh1 and 4jb1 difference for conversion kits.

Postby isuzurob » Thu Feb 12, 2015 6:40 pm

i have a complete engine and trans, loom ecotec v6 supercharged done 195,000km if your keen
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Re: 4jh1 and 4jb1 difference for conversion kits.

Postby nb422 » Thu Feb 12, 2015 6:57 pm

How much are you wanting? Will be saving up a few weeks to have enough for it but could be haha
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Posts: 213
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Country: New Zealand
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Vehicle: 1993 Isuzu MU 4jb1 EGR Blocked, Free flow exhaust, 33x12.5 Mudstars on 15x10s. 32x10.5r16 on 15x8 -44.
Spring over axle, winch bar, 50mm bodylift, balljoint flip. Exo cage soon to come. Fully certified even.

Re: 4jh1 and 4jb1 difference for conversion kits.

Postby newstory » Thu Jan 04, 2018 5:56 am

If the 4jh1 is same block as 4jb1, csnt you just swap the mounting plate on the back?
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