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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Forum Ambassador
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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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