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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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#35270 01/28/2002 2:51 AM | Joined: Dec 2001 Posts: 34 Wrench Fetcher | | Wrench Fetcher Joined: Dec 2001 Posts: 34 | I rebuilt the 250 in my 66C10 and now I'm trying to start it. When I crank it over it spins like it has no compression. When I adjusted the valves, I used the two full turns after chatter stops at TDC as the shop manual shows for a 66 250 engine. Recently it occured to me that the engine in my truck is a 71-73 250 that was transplanted in sometime in the past. My question is, could the "two turns after chatter stops" valve adjustment of the 66 engine work on the 71-73 engine or should it be one turn? | | |
#35271 01/28/2002 3:33 AM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | Lifter specs show one turn down from zero lash. Some of the guys here go with 3/4 turn.
Fred
52 3600
69 C-10
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#35272 01/28/2002 5:16 AM | Joined: Nov 2001 Posts: 72 Member | | Member Joined: Nov 2001 Posts: 72 | On the old race motors I used to set them running and crank them down until the chatter stops and go 1/4 turn more. The logic at the time was that the lifters would only go about 5K RPM before they would pump up and give you valve float. Decreasing to preload would let the engine go some more.
Dennis | | |
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