Healey 100-4 Oil Pump Condition Check

[mwagon]

I don't see any coverage in the factory service manual on what to check on the 100-4 Oil Pump. Would the key elements be the 1) Gear surface condition- scratch's etc showing abrasion. 2) Clearance between Gears?
What should the clearance limits? Are there any changes that can be made to the factory pump to improve its operation?

 

[Randy Forbes]

I'd expect you could use the specs of the 6-cylinder engine's oil pump to arrive at a go-no go decision.

As stated, looking for obvious gouges in rotor lobes and the cover.

I've been using a polymer dry-film lubricant coating on the oil pumps for a couple decades now, and I'm very pleased with that. You might want to radius internal passages where they make right-angle bends to minimize flow losses in those areas.

Shown below is a 100/6 oil pump:

Immediately after dry-film application

After "burnishing" coating finish

Installed

 

[mwagon]

Thanks Randy, great detailed feedback once again

 

[Sr_Pinguino]

Please let me know the oil pump clearance specs for a six cylinder austin healey.

My ah 100m has been off the road for years, but when I drove it the oil pressure was around 37 lbs. hot, to the best of my memory. I, like mwagon, have been wondering about my oil pump clearance, also I may have read about an adjustment that can be made to increase the oil pressure. My memory on this is pretty vague. Does anyone know of such an adjustment?