Thank you for letting me join. I am building a 68 Formula S Cuda, started on a rotisserie and now getting close to finish

[Bubbacuda68]

I am building a 68-340 for install in my 68 Formula S. I have completed {or so I thought} the build. The engine is in the car but I have snapped 2 oil pump intermediate shafts. I installed a new bushing, new shaft/gear and new oil pump but still snapped 2 shafts. Any help will be appreciated.

 

[mopar head]

to the forum. Do the shafts spin freely in the bush before engaging the cam gear? Some bushing come loose, others come tight and need to be burnished/sized with a special tool. these are what I prefer.
We`ll assume the oil pump turns freely?
good luck

 

[Bodyperson]

Are you using hardened shafts? High volume pumps need hardened shafts.

 

[RustyRatRod]

Welcome aboard! This is The Welcome Wagon, where new members introduce themselves and their cars. We love pictures, so post some up! You'll also want to find the appropriate section to post your technical question so it will get more views and help. Not everyone reads and responds here.

 

[barbee6043]

Welcome!

 

[Bubbacuda68]

to the forum. Do the shafts spin freely in the bush before engaging the cam gear? Some bushing come loose, others come tight and need to be burnished/sized with a special tool. these are what I prefer.
We`ll assume the oil pump turns freely?
good luck

Yes, the shafts spin freely. I even checked the shaft in the bushing before installation and after.

 

[Bubbacuda68]

Are you using hardened shafts? High volume pumps need hardened shafts.

Using the shafts that were sent with the new gear. There is some blue on the end indicating that the shaft has been hardened

 

[TheGrateRonzini]

Did you scrape the cam bearings? They can be awful tight

 

[Car Nut]