Engine Break-in

Daves67Cuda said

anybody wanna give me some advice, im getting alot closer to breaking the engine in. ive heard a few different oils and whatnot. i also heard that the diesel oils dont have the zinc or whatever in them anymore. any additives to use? thanks, dave

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Use 15/40 Rotella and a WI x or NAPA gold #1068 filter. I add a can of EOS (from GM) for initial breakin.
Drill 2 - 1/8" dia holes in the thermostat to make sure air can escape and fluid is full to within 1/2" below rad cap inlet. Fill carb bowls and set air adjusting screws so it will run rich at idle (Holley or Demon - 3/4 turn out) turn idle screw a couple of turns to ensure it will be idling high.
Set timing mark for #1 cylinder to 18-20* before TDC - then line up the distributor magnetic pickup with the #1 ?? (reluctor??) (the rotor will be located just before the #1 terminal on the cap).
Bump started to ensure ignition is working and have a fully charged battery.
Have at least 5 gals of gas in the tank.
Have Fire Extinquisher available - don't ask.
Pump gas 2-3 times and have someone else turn key

Try and make sure the engine stays running for at least 10 minutes ±2000rpm with a few blips to 25-3000rpm. If it doesnot start within 2-3 revolutions - something is wrong and continued cranking will not fix it. If you can, check and set timing to 34-36* total mechanical. Let it cool down for at least 1/2 hr.
Cam breakin takes approx 30 minutes running at this speed, but doesnot have to be 30 minutes continuous - 5 minutes at a time will work - but 3- 10s would be better.
You are checking for leaks all the time - and oil pressure and water temp.
After breakin - drain oil and change filter. Same brand and grade of oil and filter will work good too. Run for 500miles - change oil and filter.
Drive it like you own it - any time after breakin. M2CsW.

Have fun. :salute: