Low oil pressure when hot

[AWSOM50]

Won't he need a hardened intermediate shaft for the high volume pump?

Is there an easy way to tell if my current one is hardened or not?  Or should I just assume it isn't since I don't have a HV pump?

Looks like a tricky job to replace...

The oil pump drive is easy to replace ; once the distributor is out insert a flat screwdriver in the slot and turn it the opposite direction of rotation....the gear will back right out.

I prefer the harden shaft OP drives for 2 reasons ; the tapered shaft is stronger and the gear is also pinned onto the shaft for additional strength. 


Ron

Thanks, I really appreciate the help.

Sorry to ask for more hand holding, I have searched but just can't determine for sure the correct part, I think it's either:

1) "Mopar Performance Oil Pump Driveshaft and Distributor Gear Sets P3571071"
2) "Melling Heavy-Duty Intermediate Driveshafts IS-63"

I'm planning to get the Melling M63HV pump

[cdr]

you will also need the correct bolts for an HV pump, they are longer. I got everything from 440 source.

[cdr]

pump   http://store.440source.com/Melling-M-63HV-High-Volume-Oil-Pump-New/productinfo/M63HV/

bolt kit     http://store.440source.com/High-Strength-Bolt-Kit-for-High-Volume-Oil-Pump-New/productinfo/109%2D1502/

gasket http://store.440source.com/Oil-Pump-Gasket/productinfo/144%2D1002/

drive http://store.440source.com/Pinned-HD-Intermediate-Shaft-New/productinfo/200%2D1078/

take the new pump apart & wash it out with a solvent, air blow it dry & put back together with Vaseline or assembly  lube.

when you remove the old oil pump drive make note the direction the slot is pointing so you can install the new one the same way, also lube the new shaft at the bushing location.

[68CoronetRT]

take the new pump apart & wash it out with a solvent, air blow it dry & put back together with Vaseline or assembly  lube.

when you remove the old oil pump drive make note the direction the slot is pointing so you can install the new one the same way, also lube the new shaft at the bushing location.

This^^ When I first put my Mellings HV pump in the seal inside the main housing was actually cracked from the factory and I had thin oil coming out and getting everywhere, I thought it was the PS line at first and changed everything about that, then I decided to just take the pump off and inspect and sure enough the o ring was cracked. East fix and hasnt leaked since.

[firefighter3931]

pump   http://store.440source.com/Melling-M-63HV-High-Volume-Oil-Pump-New/productinfo/M63HV/

bolt kit     http://store.440source.com/High-Strength-Bolt-Kit-for-High-Volume-Oil-Pump-New/productinfo/109%2D1502/

gasket http://store.440source.com/Oil-Pump-Gasket/productinfo/144%2D1002/

drive http://store.440source.com/Pinned-HD-Intermediate-Shaft-New/productinfo/200%2D1078/

take the new pump apart & wash it out with a solvent, air blow it dry & put back together with Vaseline or assembly  lube.

when you remove the old oil pump drive make note the direction the slot is pointing so you can install the new one the same way, also lube the new shaft at the bushing location.

Good parts list and excellent advice ! 


Ron

[AWSOM50]

pump   http://store.440source.com/Melling-M-63HV-High-Volume-Oil-Pump-New/productinfo/M63HV/

bolt kit     http://store.440source.com/High-Strength-Bolt-Kit-for-High-Volume-Oil-Pump-New/productinfo/109%2D1502/

gasket http://store.440source.com/Oil-Pump-Gasket/productinfo/144%2D1002/

drive http://store.440source.com/Pinned-HD-Intermediate-Shaft-New/productinfo/200%2D1078/

take the new pump apart & wash it out with a solvent, air blow it dry & put back together with Vaseline or assembly  lube.

when you remove the old oil pump drive make note the direction the slot is pointing so you can install the new one the same way, also lube the new shaft at the bushing location.

Thanks, really appreciate this.  Will be ordering shortly.

Do I also need the bushing? http://store.440source.com/Intermediate-Shaft-Bushing-Bronze-New/productinfo/101-1001/

And a high pressure spring with that pump?  (Trying to understand 'high volume' vs 'high pressure')

[cdr]

pump   http://store.440source.com/Melling-M-63HV-High-Volume-Oil-Pump-New/productinfo/M63HV/

bolt kit     http://store.440source.com/High-Strength-Bolt-Kit-for-High-Volume-Oil-Pump-New/productinfo/109%2D1502/

gasket http://store.440source.com/Oil-Pump-Gasket/productinfo/144%2D1002/

drive http://store.440source.com/Pinned-HD-Intermediate-Shaft-New/productinfo/200%2D1078/

take the new pump apart & wash it out with a solvent, air blow it dry & put back together with Vaseline or assembly  lube.

when you remove the old oil pump drive make note the direction the slot is pointing so you can install the new one the same way, also lube the new shaft at the bushing location.

Thanks, really appreciate this.  Will be ordering shortly.

Do I also need the bushing? http://store.440source.com/Intermediate-Shaft-Bushing-Bronze-New/productinfo/101-1001/

And a high pressure spring with that pump?  (Trying to understand 'high volume' vs 'high pressure')

as long as the bushing is not worn, no reason to change it,  NO to the high pressure spring.

[myk]

Forget about high pressure, only go for the high volume...

[GreenMachine]

It's my understanding that the high volume pumps are built with the high pressure spring, 80 PSI vs 60 PSI.

If you decide to replace the intermediate shaft bushing, there is a knurling procedure to do after installation. If not done correctly, it could wear out prematurely. I agree with cdr, if it's not worn, then don't replace it.

[BSB67]

It's my understanding that the high volume pumps are built with the high pressure spring, 80 PSI vs 60 PSI.

This is the way it use to be, and I suspect that it still is.