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#1 (permalink) |
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Junior Member
Join Date: May 2006
Posts: 1
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39 degree 425 Engine
Hi All: I reciently rebuilt a 425 from a 1966 Dynamic 88 for a customer and it has severe valve noise, but runs OK. I am in the process of rechecking the valve stem highth, and will install adjustable push rods, but I think I may have the wrong camshaft. I've been told that somtime mid year 1966 Olds changed to the 39 degree engine and this one could be 45 or 39 degree. How can I tell which one I have?
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#2 (permalink) |
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Administrator
Join Date: May 2004
Location: Lees Summit MO
Posts: 2,553
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Wow, this is a tuff one. If you don't get a reply from someone here in a day or so try realoldspower.com There are some people over there that might be able to help you.
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Dan '46 2 door |
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#3 (permalink) |
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Member
Join Date: Aug 2005
Location: Henderson, Nevada
Posts: 34
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Short of tearing it down again, the 39* blocks usually had a drill spot on the web to the left of the engine code. The 39* blocks were used in the Toronado & the 45* were used in the other models. The Toro blocks also used the .921" lifters.
__________________
1966 Olds Delta 88 Convertible 1939 Buick Century 2004 Dodge Hemi Ram 2002 Kawasaki Vulcan 1500 FI |
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#4 (permalink) |
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Senior Member
Join Date: Oct 2005
Location: NJ
Posts: 350
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I believe that nearly all 66 425 engines had the 45 degree cam angle unless it was a Toronado engine with the large lifters....Mondello sells a checking tool and also gives ways to check cam angle....A cylinder head from 39 degree engine will sit atop a 45 degree block but pushrod holes wont be straight thru....Ive found this out the hard way....
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