040under Posted January 29, 2021 Share Posted January 29, 2021 I bot some early dodge 6 rods for a chevy engine project, and when I received them, they had an offset at the big end - why for ??? Bill Link to comment Share on other sites More sharing options...
Oldtech Posted January 30, 2021 Share Posted January 30, 2021 (edited) Actually fairly common. I'm sure others used offset, like Hudson. It was so that cylinders could be "paired" and still have room for wider bearings on the crank. Edited January 30, 2021 by Oldtech (see edit history) Link to comment Share on other sites More sharing options...
040under Posted April 12, 2021 Author Share Posted April 12, 2021 Thanks, I C Link to comment Share on other sites More sharing options...
keithb7 Posted April 13, 2021 Share Posted April 13, 2021 Siamese pairing. Coolant does not flow between all adjacent cylinders. Font of block, and rear of block allow for coolant to cross flow form left side of block to right. Also between cyls 2&3 and 4&5. However between cylinders 1&2, 3&4, and 5&6, that is not so. Coolant does not cross flow. Those cylinders are closer together. So off set con-rods are necessary. See pic and look at the different spacing between cylinder pairs. My understanding is this siamese design also leads to some hotter spots in the engine. Some valves may run hotter than others. I suspect this is why the Chrysler engineers instruct us to set the valve lash when the engine is at full operating temperature. 2 Link to comment Share on other sites More sharing options...
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