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Old 05-20-2003, 07:01 PM
Sledgeman63's Avatar
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Hi Guysand Gals, Well I have just completed my first engine rebuild. I am right now just double checking all my hose connections and thinking about all those nuts and bolts that I have cleaned and cared for over the last 3 weeks. My question is about breaking in new motor (initial start up). I am wondering how can I make sure my timing is close enough to start the motor, I went to tdc #1 and put in the distributor so the rotor is pointing at #1 cyl, and then ran my firing order 1,8436572 on the cap, I guess when I start it I will need a helper to rotate distributor until it sounds like it is running right???
Run motor for 20 25 min adjusting from 2000 to 2500 rpm to breaak in cam . How many miles before I can ROMP on it ?? 396 bored .30 b,and b some head work done bigger valves, springs, solid comp cam 282s ,lifters,edelbrock air gap , speed demon 750, msd 6al ,msd distributor, Question where should I start for timing, and should this be done prior to my break in period of 20 min. I will be turning the key over tomorrow a.m. wish me luck, sorry my thoughts are running WILLDDDD
I will have to read responses in the a.m. as I am burnt. Peace Joe

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Old 05-21-2003, 06:42 AM
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You have done right with the timming. you really only need to be in the ball park with timming. + or - 5 degrees will get you stsrted. I would wait untill at 1500 easy miles beforesteepin down on it. Just to make sure everything is in good shape. Allthough on some of our circle track engines we don't even start them untill the truck is pushing me around the track. I don't recommend it though. It just happens sometimes. Good luck and she sounds like it run with the best.
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Old 05-21-2003, 06:48 AM
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Timing should be around 8* initial, on some piston's & rings they recommend a certain break in. I'd wait at least 500 miles before really hitting it, but keep it short.
After break-in re-torque all the bolts & nuts.
You mite have to adjust the carb for jets and accelerator pump for backfire or sluggest on throttle response. Their should be some more post from others to help you out. Dont forget to prime the oil system. johnsongrass1 beat me on the typing.

[ May 21, 2003: Message edited by: 1BAD80 ]</p>
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Old 05-21-2003, 07:11 AM
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Since it's your first rebuild, make sure you prime the oiling system before you start it. Correct me if I'm wrong guys, but I always prime it with the valve covers off until I see oil coming up from the rockers. When I break in the cam, I like to keep the rpms over 2500 for at least 15-20 mins. Once that is all done, I take the car out and go for a drive, but not too far, you never know what's going to happen. To break in the motor and getting the rings to seat, I've heard a ton of different opinions, but all go around the same thing, as to not drive at the same speed. Keep accelerating and letting off. As for hammering it...if everything went ok on the first drive, I drive it like it was a rental (just my opinion)! It is a good thing to change the oil after intitial break in also.
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