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Crankshaft interchangeability

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140JAG Avatar
140JAG Silver Member Bob Hardison
Huntsville, Alabama, USA   USA
1956 Jaguar XK140 "Old Red"
1961 Jaguar Mark 2 "White Mark 2"
1965 Jaguar Mark 2 "Old Blue"
1969 Jaguar E-Type Convertible
My 3.8 XKE crankshaft is toast. Does anyone know what other crank will interchange? I have extral 4.2, 3.4 and 2.4 cranks, but no 3.8.

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Curmudgeon Dave C
somewhere, USA   USA
1950 Ford Custom
1950 Ford F-1 "The Ugly Truckling"
1964 Jaguar Mark 2 "Elizabeth"
2.4L is stroke of 76.5 mm (3.0 in).
3.4L is stroke of 106 mm (4.2 in).
3.8L retained the 3.4’s bore centres and 106 mm (4.2 in) stroke .
4.2L is stroke of 106 mm (4.2 in).

So...bore centres same, looks like 3.4L, 3.8L and 4.2L are same stroke....I do not know what the damper (snout) and flywheel mounting end differences could be.

formercat1 Avatar
formercat1 Mack Besser
Maple Park, IL, USA   USA
Bob,
4.2 cranks use different main bearings than 3.8, so no fit. However, the 3.4 uses the same bearings and will fit.
The differences in 3.8 vs. 3.4 are bore sizes. Please do not get the cheap bearings. Get the VP ones, available
from Basil Adams sad smiley707)762-0974. Mack

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140JAG Avatar
140JAG Silver Member Bob Hardison
Huntsville, Alabama, USA   USA
1956 Jaguar XK140 "Old Red"
1961 Jaguar Mark 2 "White Mark 2"
1965 Jaguar Mark 2 "Old Blue"
1969 Jaguar E-Type Convertible
Ah! Just what I needed to hear! This place is a wealth of information from a bunch of smart people!

kirks-auto Platinum Member Robert Kirk
Davenport, Iowa, USA   USA
Agree, 4.2 block cylinders are actually cast in a different position. Vandervell bearings were the best in their day. 50 year old Vande bearings are known to deteriorate in original boxes. Unless you intend to campaign the car in vintage racing and are personally certain VP1 bearings are the best, there is no need to pay the money nor risk of 4 decade or more old bearings. Modern alternatives are made to the same exacting specifications with modern materials often equal or better than 1947 technology.



Regards,
Robert Kirk

kirkbrit@yahoo.com
Texting results in an an email reply (563 940 1864)
Business phone 563 323 1017
http://kirks-auto.com

Moss distributor UK importer
Beat or match any retail/delivered quote

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