Re: The Duchess Project: 1940 Super 8 Convertible Sedan
Posted by Joe Santana On 2018/1/15 15:49:45
The head gasket is good, but the studs are leaking and were not tightened into the block. Central Cylinder Head took responsibility and will cover the oil and the gaskets we'll need to pull the head.
I'm in the process of ordering new studs, washers and (while we're at it) stainless acorn nuts.
And in the process checked the engine number. I'm not sure if there are two places for the engine number, but I remember determining that we had a 1947 356 from something stamped underneath. But from the casting, it turns out we have a 1948. But the numbers weren't cast very well.
So am I reading this casting correctly? G6068180?
Having to redo the head is a shame, because the engine is running so well, but I hope it will help someone else to be sure the threads in the block and, more likely, the studs themselves are good and that they install tight to prevent leaks. The rolled, slightly over sized threads should do the trick. According to Bruce Blevins, Packard didn't use sealant. So with the correct studs #341119 (1940-1950), new washers (3883) and nuts (7007 reg or 141987 acorn), we can eliminate the leaks.
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I'm in the process of ordering new studs, washers and (while we're at it) stainless acorn nuts.
And in the process checked the engine number. I'm not sure if there are two places for the engine number, but I remember determining that we had a 1947 356 from something stamped underneath. But from the casting, it turns out we have a 1948. But the numbers weren't cast very well.
So am I reading this casting correctly? G6068180?
Having to redo the head is a shame, because the engine is running so well, but I hope it will help someone else to be sure the threads in the block and, more likely, the studs themselves are good and that they install tight to prevent leaks. The rolled, slightly over sized threads should do the trick. According to Bruce Blevins, Packard didn't use sealant. So with the correct studs #341119 (1940-1950), new washers (3883) and nuts (7007 reg or 141987 acorn), we can eliminate the leaks.
Attach file:
(80.17 KB)
(202.16 KB)
(96.44 KB)
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