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Mill a '47 245 head?
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Found the post below in the Chatroom. Will PM "clip47" and also respond in Chat that I've re-posted his question here.
[clip47] 5:22 am: Hi, I'm new to this, but have a question. I have a '47 245 apart and want to know how much I can mill the head without Valve problems. The #$%^&* ustion chamber measures 96cc. Thanks
Posted on: 2009/11/1 15:00
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Mal
/o[]o\ ====  Bowral, Southern Highlands of NSW, Australia "Out of chaos comes order" - Nietzsche. 1938 Eight Touring Sedan - SOLD 1941 One-Twenty Club Coupe - SOLD 1948 Super Eight Limo, chassis RHD - SOLD 1950 Eight Touring Sedan - SOLD What's this?  Put your Packard in the Packard Vehicle Registry! Here's how! Any questions - PM or email me at ozstatman@gmail.com |
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Re: Mill a '47 245 head?
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Home away from home
 
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I wouldn't go anymore than is necessary to clean up a warped head. If you go too much you will create thin spots in the head that will eventually lead to cracks and failure of the head.
Posted on: 2009/11/1 16:56
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Re: Mill a '47 245 head?
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Just popping in
 
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Thanks for the info. I think I'll go 0.030 and put it back together.
Posted on: 2009/11/2 10:33
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Re: Mill a '47 245 head?
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Unless you're certain it hasn't been milled at some point in the past, I'd check the clearance over the valves before I arbitrarily settled on 0.030". Using a dab of modelling clay on the valve heads is a method I've used successfully, though there are others.
Posted on: 2009/11/2 11:38
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Re: Mill a '47 245 head?
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Forum Ambassador
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G'day 47clip,
Glad you made it to PackardInfo and  Keep the questions coming as there are experienced, knowledgeable and friendly Packard people here willing to share, help and advise.
Posted on: 2009/11/2 14:19
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Mal
/o[]o\ ==== Bowral, Southern Highlands of NSW, Australia "Out of chaos comes order" - Nietzsche. 1938 Eight Touring Sedan - SOLD 1941 One-Twenty Club Coupe - SOLD 1948 Super Eight Limo, chassis RHD - SOLD 1950 Eight Touring Sedan - SOLD What's this? Put your Packard in the Packard Vehicle Registry! Here's how! Any questions - PM or email me at ozstatman@gmail.com |
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Re: Mill a '47 245 head?
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Just popping in
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Thanks again for the advise. I'll use the clay - good idea. I cc'd the head and it measured 96cc so if it has been milled in the past they did not take much off. Still, better safe than sorry.
Posted on: 2009/11/4 8:54
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Re: Mill a '47 245 head?
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You just gotta love someone who cc's a head before comtemplating milling it! Don't have the data handy for the 1947 version, but for the 245 Six in 1938 Packard listed combustion chamber volumes as:
99-101 cc for the standard 6.52 CR head 102.5-106.5 cc for the 6.3 CR head 88.5 - 92.5 ccs for the 6.85 and 7.05 (alum) CR heads
Posted on: 2009/11/4 9:30
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Re: Mill a '47 245 head?
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Just popping in
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I'm getting ready to install new valve guides and wonder if anyone has installed valve stem seals on the intake valves of a flathead? It looks like a GM seal will fit within the spring if the bottom of the guide is turned before the guide is installed. Any thoughts? This is my first Packard engine. Thanks.
Posted on: 2009/11/10 9:42
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Re: Mill a '47 245 head?
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Valve stem seals not required or desired.
Have fun changing the guides, they can be challenging.
Posted on: 2009/11/10 9:47
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