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7 members (Wally / Montana, Gray_Ghost, JW51, Otto Skorzeny, kades51, Bill Hanlon, 1 invisible),
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Mod | | | Forums66 Topics128,052 Posts1,055,724 Members48,426 | | Most Online14,466
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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For helping keep this great
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on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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| | | Joined: Jan 2017 Posts: 308 'Bolter | | 'Bolter Joined: Jan 2017 Posts: 308 | Got the truck back today with my rebuilt 235--purrs like a kitten. This has Fenton headers and 32/35 Weber from Langdon's stovebolt, Was bored .040 over and new Rockers and rocker shafts. May go for a long drive Sunday, as we have no snow. Do I follow the 49 Op Manual and drive no more than 35 MPH for the 1st 100, 45MPH for the next 200 and 50 MPH for the last 200-then change oil? Thanks for your input...Bill
Last edited by 49 3100; 01/14/2018 4:08 PM.
| | | | | Joined: Apr 2016 Posts: 1,042 'Bolter | | 'Bolter Joined: Apr 2016 Posts: 1,042 | You have to love a fresh engine. Don't forget to break it in right.
Old enough to know better, too young to resist.
| | | | | Joined: Jan 2005 Posts: 310 Shop Shark | | Shop Shark Joined: Jan 2005 Posts: 310 | I would find the manual from the year of manufacture for the engine. The '49 manual was written giving break in instructions for a babbit pounder. There is a good chance the instructions will be different for a full pressure engine.
-Tim
'51 Chevy 3104 w/'56 235, 848 Head, HEI Dizzy, Corvette Cam, Split Manifold and Dual Carter YF's
| | | | | Joined: Mar 2010 Posts: 10,272 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,272 | What does the machine shop recommend for breaking in the engine? Most of them recommend breaking in the cam by running the engine at 2,000 RPM for 20 minutes before you ever drive it.
Breaking in a rebuild is different than for a new engine. A new engine has all new parts. A rebuild has an old block with a myriad of new parts and reconditioned old parts.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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