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4ja1 with 4jb1 crankshaft

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4ja1 with 4jb1 crankshaft

Postby Akexpei86 » Tue Dec 22, 2020 11:53 pm

Have any one try using 4jb1t crankshaft on 4ja1
Please let me know

Urgent!!!!
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Re: 4ja1 with 4jb1 crankshaft

Postby geeves » Wed Dec 23, 2020 9:53 am

Without any more information the 4jb1t has a longer stroke so I would worry about the pistons coming up too high in the block and hitting the head. Dont know if they use the same bearings
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: 4ja1 with 4jb1 crankshaft

Postby paulthepilot5 » Thu Jan 07, 2021 6:50 am

Akexpei86 wrote:Have any one try using 4jb1t crankshaft on 4ja1
Please let me know

Urgent!!!!


Most likely possible by topping the pistons or running a head shim to account for the longer stroke. This is the case for other 4J engines
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