The Stovebolt Site Forums The Shop Area Engine Shop drive way running in of engine

hey guys - just about ready to fire the mother up. This rebuilt engine ahs been sitting for approx 5 years. Every 6 months or so I sprayed in a rust buster and some 30 wt and rolled her back and forth in the drive way. How best to get the truck engine into shape for shake down cruises? ie for wearing in the rings and valves.

Here's everything you need to know. Check out the rest of the site too.


http://www.hastingsmfg.com/Service%20Tips/breakin_procedure.htm

That link seems like an almost blank page...am I missing something?

I just emailed your the info. Good luck with your startup.

Joe

Your email returned failed. Let's try this:

BREAK-IN PROCEDURE

STARTING PROCEDURE
1. Set tappets, adjust carburetor and ignition timing as accurately as possible before starting engine.

2. Start engine and set throttle to an engine speed of approximately 25 miles per hour (trucks, tractors and stationary engines one-third throttle) until the engine coolant reaches normal operating temperature. Then shut down engine and retorque cylinder head bolts, recheck carburetor adjustments, ignition timing and valve tappet clearance. (Run engine at fast idle during warm-up period to assure adequate initial lubrication for piston rings, pistons and cylinders.)

BREAK-IN PROCEDURE

1. Make a test run at 30 miles per hour and accelerate at full throttle to 50 miles per hour. Repeat the acceleration cycle from 30 to 50 miles per hour at least ten times. No further break-in is necessary. If traffic conditions will not permit this procedure, accelerate the engine rapidly several times through the intermediate gears during the check run. The object is to apply a load to the engine for short periods of time and in rapid succession soon after engine warm up. This action thrusts the piston rings against the cylinder wall with increased pressure and results in accelerated ring seating.

2. Following the breaking-in, turn the vehicle over to the owner or operator with the following suggestions:

PASSENGER CAR AND LIGHT TRUCK
Drive vehicle normally but avoid sustained high speed during the first 100 miles.

HEAVY DUTY TRUCKS AND BUSES
If possible, place in light duty for first 50 miles. At no time should the engine be lugged. Lugging is said to exist when the engine does not respond to further depression of the accelerator.

FARM TRACTORS
Operate at one-half load or less for the first two hours.

Pull the plugs and spin it over a while before trying to start it. You don't want to hydrolock a piston with all of those fluids in there,
Scott

If it was mine after sitting all that time I would run the oil pump fer a while before I tried to start it. To do this you take out the distributor and insert a cut off screwdriver or such to spin the oil pump with a drill. I like to see some oil pressure on the gage and check oil is getting to top end. You can make a nifty tool out of an old distributor if you have a spare, but even a rod with the end flattend will work. I'm sure you already know but it's worth metioning to make sure you mark the distributor before you take it out so it gets put back in timed right. Mark both distributor to block and rotor to distributor.