The Ford Barn - View Single Post - Break-in gone wrong!

Ronnieroadster · 03-20-2024, 04:44 PM

One possibility if the rear oil pump idler gear was installed backwards {easy to do on the 8BA} the gear mesh will work for a short time then the gear will strip thus the oil pump will not turn causing no oil pressure.

The 40 to 50 pounds pressure you noticed on the first fire up is good for Idle RPM which is what I expect you had during run time to set timing and carbs. If the idler gear is backwards the stress on the gear would be a lot at 50 PSI easily damaging the Idler gear if its installed incorrectly.

Pull the pan remove the pump have someone turn the crank with a rachet look up into the pump hole see if the full width of the idler gear teeth can be seen. If you see the gear use a long flat blade screw driver to push on the gear it should not move. If it moves then the gear on the end of the cam has come loss. If you find everything is good then there's some other issue you now have to look for.

Ronnieroadster

03-20-2024, 04:44 PM	#5
Ronnieroadster Senior Member Join Date: Dec 2010 Location: East Coast in CT Posts: 1,551	Re: Break-in gone wrong! One possibility if the rear oil pump idler gear was installed backwards {easy to do on the 8BA} the gear mesh will work for a short time then the gear will strip thus the oil pump will not turn causing no oil pressure. The 40 to 50 pounds pressure you noticed on the first fire up is good for Idle RPM which is what I expect you had during run time to set timing and carbs. If the idler gear is backwards the stress on the gear would be a lot at 50 PSI easily damaging the Idler gear if its installed incorrectly. Pull the pan remove the pump have someone turn the crank with a rachet look up into the pump hole see if the full width of the idler gear teeth can be seen. If you see the gear use a long flat blade screw driver to push on the gear it should not move. If it moves then the gear on the end of the cam has come loss. If you find everything is good then there's some other issue you now have to look for. Ronnieroadster __________________ I use the F word a lot no not that word these words Flathead , Focus and Finish. "Life Member of the Bonneville 200 MPH Club using a Ford Flathead block" Owner , Builder, Driver of the First Ford Flathead bodied roadster to run 200 MPH Record July 13, 2018 LTA timing association 200.921 in one and a half miles burning gasoline. First ever gas burning Ford flathead powered roadster to run 200 MPH at Bonneville Salt Flats setting the record August 7th 2021 at 205.744 MPH Last edited by Ronnieroadster; 03-20-2024 at 04:50 PM.