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Thread: LA Sleeve FL-3244 Help
08-29-2019, 08:00 PM #16
08-30-2019, 06:28 PM #17
- Join Date
- May 2017
Darn, you caught me Ed. Thanks!!!
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09-04-2019, 09:22 PM #18
- Join Date
- Aug 2017
09-04-2019, 11:06 PM #19
In general you want to put the o-ring wire in the more malleable metal and the receiver groove in the less malleable (read harder) metal. The harder material was always the target for the receiver groove.
There is a rationale behind the methodology. As it turns out on the malleability scale aluminum is near the top, cast iron is substantially farther down and copper falls in-between favoring the cast iron end of the scale. When you put a receiver groove into aluminum and use copper gaskets with stainless o-rings in the opposing mating surface, the pressure from the essentially noncompress-able stainless wire pushing through the copper gasket will mush out the nicely formed receiver groove in the aluminum creating a sealing issue.
By way of contrast, copper can not mush out the cast iron and an excellent interlocking high pressure seal is possible to create and maintain. When both the block and the head are made of aluminum the only way to create a reliable combustion pressure capable sealing joint is to use sleeves with a flange wide enough to accommodate the o-ring receiver groove.
Not withstanding the correct way to implement the seal, there are all manner of variations that have been used over the years. When all the smoke finally cleared, the receiver grooves in cast iron liners or cast iron block decks was the hands down winner along with the stainless wire being installed into the softer more pliable aluminum head casting deck surfaces and a dead soft or annealed 0.043" solid copper gasket between the two.
Last edited by eschaider; 09-05-2019 at 04:10 PM. Reason: Spelling & Grammar