460 oil pump

[jmat847007]

I have had two melling oil pumps break where the bolts attach to the block. Was wondering if anybody else having similar problems and what the fix was. did not over tighten bolts. any info on a different oiling system greatly appreciated been looking at going external but there a lot more expensive
thanks jason

[460rogers]

I had 1 melling do that in my road toy.The problem was the pump ran dry at WOT.I went to a larger pan and have had no problems since.

[77charger]

What pump do you have.Why i ask is i have a spare one(brand new)it is the one with the screw in pick up.melling high volume.

[TX19]

I am aware of two incidents where the pump broke just below where it bolts on to the block. Both cases were on externally balanced engines and when they were internally balanced the problems stopped.

[jmat847007]

Originally posted by 77charger:
What pump do you have.Why i ask is i have a spare one(brand new)it is the one with the screw in pick up.melling high volume.
My pump is a melling that the pick up tube bolts to

[jmat847007]

What difference does it make if the motor is internally or externally balanced. My motorruns very smooth this being the only problem with it. Ford 460 that has been bored and strok to a 557 at around 750 hp

[Snowboat]

I just tore down a 427 from a Howard runner. The number one rod bearing spun and the others were on their way. I either abused it by starting it and instantly hauling ass or maybe my oil pan wasn't large enough like 460rogers. Any thoughts about the minimum size of an oil pan for 7,000 rpm operation with high volume pumps? Snowboat.

[77charger]

Originally posted by jmat847007:
My pump is a melling that the pick up tube bolts to
i take that back the pick up does bolt on the part number for the pump is m84d.if your in the so.cal area you can have it(as long as you can use it)for free it is brnd new in box.

[jmat847007]

thanks 77 charger for the offer but im not in the s cal area. Was wondering if any body could give me some advice pros and cons of different oiling systems. like external pumps or dry sump. Dont know much about this stuff but i do know broken oil pump no fun. thanks guys
[This message has been edited by jmat847007 (edited November 22, 2001).]