When Curt broke in his newly rebuilt engine, we towed it around the neighborhood in gear. He insisted on doing so with the spark plugs in loosely so it did not suck any thing bad into the engine. In doing so, the engine pumped oil out everywhere, the exhaust, the carb, and out the spark plug holes past the plugs. I would assume it did so, as even with the plugs in loose, there was enough suction past the unseated rings to pump the oil out of the crank case.
How have others handled this? I will soon be putting a fresh engine back into my car, plan on towing it also, as it is quite tight now. If I left off the head completely, there would be no pumping action. This time of year the streets are pretty clean in my neighborhood. But I am not sure that is correct either.
How have others handled this without making an oily mess?
I fire them up with a 12 volt starter and let them run,do not have the generator in the block on 12 volts it will burn it up, use a block off plate.
The engines I put together didn't pump oil out of the engine like that. I started them by jacking up the back wheel or pushing them off down a hill and engaging the engine. Worked for me.
If your pumping oil i think you have a problem??Bud.
Opp's,i should have asked how fast did you tow it??Bud.
I remove the plugs and then have a friend tow me around for 20 minutes in an empty parking lot. Many of my rebuilt engines have no starter, so this is the only option.
Start it up and run it. If it's so stiff that it needs to be towed them somethings wrong with it.
Any engine will pump oil when motored that way.
When the pistons go down on the compression stroke the valves are closed so a nearly perfect vacuum is created on the down stroke so they pump oil like crazy.
Start it and run it.
To break it in alternately run it no load and heavy load at short intervals.
Going up a hill and coasting down a few times is excellent exercise for a new engine.
Ford used electric motors turning the engines in high gear to burn in the bearings. If your frsh rebuilt engine is turning easy enough to start with a crank it is set up too loose in my opinion.
If the throttle was wide open (with no gas or the mixture adjustment closed) it would likely not suck oil out of the crankcase.
If you're gotta start it on 12 volts just ground the wire coming out of the generator. Or leave it connected, many T owners have run their cars with a 12 volt battery and 6 volt generator for many years with no damage to the generator. It will charge whatever voltage battery you have in the car.
I'd worry more about the starter when starting a tight engine on 12 volts.
Just pull it down the street and start it if it's too tight to start with the starter.
If you don't have a big electric motor like the Ford factories did you should spend more time getting each bearing just right so it will turn over easy enough to start it with the starter.
Take the plugs out completely and tow it very slow, like 5 mph.
Even with the head off the rings will pass oil.
Rings depend on compression pressure from above to seal them to the bottom lands.
If the bearings have been set in with Timesaver lapping compound the engine can be crank started and does not need much break in. I would keep it under 4000 RPM for the first 100 miles or so anyway just to be on the safe side.
I want your T Art!! if taking it easy is 4000RPM what will it do if you give it a gut full?
High high do you suggest once it is run in?