• Hey Guest!
    British Car Forum has been supporting enthusiasts for over 25 years by providing a great place to share our love for British cars. You can support our efforts by upgrading your membership for less than the dues of most car clubs. There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Upgraded members don't see this banner, nor will you see the Google ads that appear on the site.)
Tips
Tips

Healey 100-4 Oil Pump Condition Check

Share this page

M

mwagon

Jedi Hopeful
Country flag
Offline
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?
 
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

IMG_1004.jpg


After "burnishing" coating finish

IMG_1041.jpg


Installed

IMG_1103.jpg
 
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?
 
Back
Top