Rebuilding oil pump

[yeti]

I have about 3 full oil pumps with gears what is needed to rebuild just straight cut gears and a new oil pump case?

 

[Terrance362]

Nothing, Just disassemble the oil pump housing and remove old gears and replace with the new straight cut gears. I would use the balance shaft kit while in there.

 

[BluFalcon]

Don't you have to measure the clearance between the gears and the ID of the gear cavity in the front case as well?

 

[yeti]

Thats what i was thinking because the other gears push against the case at high rpm's.
Then agian the straight cut gears dont push against the case at all, so if anything on a worn case it would just be more room??? /ubbthreads/images/graemlins/dunno.gif

 

[BluFalcon]

Too much clearance between the gears and wall of the cavity will affect the efficiency of the pump no matter what gears you use.

 

[Terrance362]

As far as I know they are just a drop in deal, but when using a old case I would look for wear on the casing.

 

[yeti]

Any one know the specs?

 

[joggle]

From the Mitsu 90-92 4g6x engine overhaul manual:
Side clearance -
Drive gear (.0031" to .0055")
Driven gear (.0024" to .0047")