Posted By: Cab_Burge
Cleaning new Molnar rods results - 11/30/19 03:22 AM
I'm rebuilding a 440 stroker motor for one of my local customers, it had a older 4.150 440 Source stroker kit in it assemble by another local Mopar racer a bunch of years ago.
It spun a rod bearing(not badly) so I suggested having the crankshaft magnafluxed and if it magged good to resuse it by offset stroking the rods down to BB Chevy rod journal size and increase the stroke as much as we could get. It ended up with a 4.322 stroke,
I ordered a se off Molnar 7.100 long BB Chevy type rods and a set of CP pistons to match this motor pistons through them
I normally disassemble and clean the rods in my solvent tank and then blow dry them and reclean them with brake cleaner and blow dry them again.
It snowed here early this week and the outside air temps haven't been above 25F during the day and my shop where the solvent tank is right at 50F so I decided to use a small amount of solvent in a small steel oil drain pan and hand clean them with brushes, I use two pans and put 4 rods apart in the one without solvent and clean the other four in the pan with solvent.
I'm amazed how much gunk was washed off those eight rods
They looked like the shop I had balance and check both ends ran them through a spray washer when they where done so maybe some of that gunk is from them
My main message is to clean them and every thing else that goes into the motor, NEVER ASSUME they(any parts) are clean enough to use brand new
It spun a rod bearing(not badly) so I suggested having the crankshaft magnafluxed and if it magged good to resuse it by offset stroking the rods down to BB Chevy rod journal size and increase the stroke as much as we could get. It ended up with a 4.322 stroke,
I ordered a se off Molnar 7.100 long BB Chevy type rods and a set of CP pistons to match this motor pistons through them
I normally disassemble and clean the rods in my solvent tank and then blow dry them and reclean them with brake cleaner and blow dry them again.
It snowed here early this week and the outside air temps haven't been above 25F during the day and my shop where the solvent tank is right at 50F so I decided to use a small amount of solvent in a small steel oil drain pan and hand clean them with brushes, I use two pans and put 4 rods apart in the one without solvent and clean the other four in the pan with solvent.
I'm amazed how much gunk was washed off those eight rods
They looked like the shop I had balance and check both ends ran them through a spray washer when they where done so maybe some of that gunk is from them
My main message is to clean them and every thing else that goes into the motor, NEVER ASSUME they(any parts) are clean enough to use brand new