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Lotus Europa Forums => Garage => Topic started by: Richard48Y on Friday,September 16, 2022, 09:54:23 PM

Title: Do 821 and 807 Renault blocks use the same sleeves?
Post by: Richard48Y on Friday,September 16, 2022, 09:54:23 PM

Do 821 and 807 Renault blocks use the same sleeves?
I know I have seen the answer to this somewhere, probably here.
Not finding it tonight.

Title: Re: Do 821 and 807 Renault blocks use the same sleeves?
Post by: GavinT on Saturday,September 17, 2022, 05:27:20 AM

The 821 and 807 are basically the same block - both with 82.5mm base locating diameter for the sleeves and the same crank stroke and liner sealing arrangement (paper rings).
I expect the sleeves are the same.

Title: Re: Do 821 and 807 Renault blocks use the same sleeves?
Post by: jbcollier on Saturday,September 17, 2022, 06:45:27 AM

They are basically the same sleeves.  At manufacture, sleeves are matched to pistons and sold as a set.  If you are mixing and matching, check your piston clearances carefully!

The early 697 (1470 engines came with a 82mm base.