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2F and 3F similarities

Tech Talk for Cruiser owners.

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Posts: 83
Joined: Wed May 14, 2003 8:48 pm
Location: Northern Territory

2F and 3F similarities

Post by brumby runner »

Hey guys,

It seems I have run one of the main bearings dry on the 2F in my FJ40 and stuffed the crank. Such a shame as it was a sweet running original motor with less than 200,000 on it. Now I happen to have a 1984 model FJ45 Troopy that I bought for parts. It has a high milage 3F in it that was still running so I'm thinking I could grab the crankshaft and drop it into the 2F.

Can anyone tell me if the crankshafts are the same?
BJ40 (B)
FJ40 (2F)
FJ73 auto (3F)
79 series (1HZ)
79 series (1HDFTE)
100 series auto (1HDFTE)
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Location: vic

Post by brentz »

not quite sure buddy but im pretty sure it could be different as there is a 0.2L capacity difference dunno wether that makes a difference or wat
brentz
TUF-60 starting build soon
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Posts: 83
Joined: Wed May 14, 2003 8:48 pm
Location: Northern Territory

Post by brumby runner »

Really?
I thought they were both 4.2 litre motors. :?
BJ40 (B)
FJ40 (2F)
FJ73 auto (3F)
79 series (1HZ)
79 series (1HDFTE)
100 series auto (1HDFTE)
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Joined: Thu Oct 04, 2007 12:54 pm
Location: brisbane

Post by solo13 »

nah mate 3f only 3.9 and a lot slower motor than 2f
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Post by dumbdunce »

3F is basically a de-stroked 2F, the crank is different.
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Post by brumby runner »

Thanks for the replies. I've saved a bunch of time not trying to make that 3F crank fit. I managed to track down another 2F crankshaft from a mate of a mate so with some new bearings and seals and gaskets I should be good to go early next week.

Thanks again for the info.
BJ40 (B)
FJ40 (2F)
FJ73 auto (3F)
79 series (1HZ)
79 series (1HDFTE)
100 series auto (1HDFTE)
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Posts: 83
Joined: Wed May 14, 2003 8:48 pm
Location: Northern Territory

Post by brumby runner »

Still havn't put the 2F back together but now I've got another compatability question.

Will my 2F bolt up to the auto trans in an FJ73 that came with a 3F?
The FJ73 is in good nick and the engine runs fine it's just really gutless and thirsty compared to the 2F.
BJ40 (B)
FJ40 (2F)
FJ73 auto (3F)
79 series (1HZ)
79 series (1HDFTE)
100 series auto (1HDFTE)
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Posts: 6029
Joined: Tue Dec 24, 2002 9:34 pm
Location: South Australia

Post by bad_religion_au »

brumby runner wrote:Still havn't put the 2F back together but now I've got another compatability question.

Will my 2F bolt up to the auto trans in an FJ73 that came with a 3F?
The FJ73 is in good nick and the engine runs fine it's just really gutless and thirsty compared to the 2F.
should do, all the 3f's i've seen had the same bellhousing bolt pattern, so i'd say yes
Spit my last breath
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