L-46 heads
Thread Starter
Instructor
Joined: Aug 2001
Posts: 120
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From: westmoreland n.h.
L-46 heads
my 70 L-46 heads are sucking oil by the valve guides, and was thinking to replace the heads with aluminum ones, but don't know what size cc the stock heads are. rebuilding the cast ones would be cheaper, but i'm looking for better. not cheeper.any help on combustion chamber size on stock heads would be great. :seeya :flag
Pro
Joined: Oct 2002
Posts: 708
Likes: 0
From: somewhere south of normal
Re: L-46 heads (dash8)
My L-46 had 3927186 heads, which have 64cc chambers, 2.02/1.60 valves. This is actually a very good head for factory original, but there are a lot of better flowing heads available.
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Safety Car
Joined: Jun 2001
Posts: 4,004
Likes: 2
From: Severna Park Md
Re: L-46 heads (dash8)
64cc on the chamber volume. I had a big problem with my heads sucking oil thru guides too. A qt every 300mi or so. fouling plugs and everything. I removed the stock seals and went with Crane Cams positive valve seals. they lock down over the guide and stay down, unlike the umbrella seals that ride with the stem. The positive locking seals totally cured the oil controll problem. Crane # 99819 if you still have the stock diameter guides. There are other sizes available if the guides were changed to different outside diameter ones. They fit without any machining required. I'll never put togeather any SB heads without them.
