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BritishV8 Forum

General Category => Engine, Transmission, & Rear Axle assy. => Topic started by: 62Healeyhacker on March 22, 2023, 08:28:13 PM

Title: I want to use a crossbolted 4.0 block but only have small journal crankshaft.
Post by: 62Healeyhacker on March 22, 2023, 08:28:13 PM
Is there a way to adapt the larger, 2.5 inch, mains in the block to the crankshaft with the Buick 215" 2.3 inch journals?
Title: Re: I want to use a crossbolted 4.0 block but only have small journal crankshaft.
Post by: MGBV8 on March 23, 2023, 09:53:14 AM
Over the years, that is one trick that I have never come across.  It will be faster & cheaper to find a 4.0 crank or a 3.9 block.
Title: Re: I want to use a crossbolted 4.0 block but only have small journal crankshaft.
Post by: turbodave on March 23, 2023, 10:31:13 AM
Find a block from a 1995 discovery - even better if you can find one with a build date in the second half of 1995, and it'll have the tall caps in the block. It won't be cross-bolted, but thats an easy machining operation for an experienced shop. You WILL need to line-bore afterwards, but again, no real difficulty for the right shop.
Title: Re: I want to use a crossbolted 4.0 block but only have small journal crankshaft.
Post by: ag1234 on March 30, 2023, 01:45:50 PM
More direct is better. Use 4L. crank=simpler,stronger and easier to balance.  Good Luck, Art.
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