Oil pump cover
Posted: Tue May 01, 2018 11:38 pm
Les
Your PM facility is shown as disabled so I cannot reply to your PM.
Phil
Your PM facility is shown as disabled so I cannot reply to your PM.
Phil
Morris Minor Owners Club
Promoting the Preservation and Use of the Postwar Morris Minor
https://board.mmoc.org.uk/
Oil pump cover
Page 1 of 1
Re: Oil pump cover
Posted: Wed May 02, 2018 12:02 am
Hmm just looked in my board preferences options and my PM choice is set to allow. Not sure why there's a problem.
Re: Oil pump cover
Posted: Wed May 02, 2018 7:13 am
Les
Just tried again and it comes up as disabled private message receipt
Anyway back to your question.
I have just tried the latest type spider/star drive and slot drive 1275cc oil pumps into the small block oil pump cover and they do not fit. The body of the oil pump is too large a diameter to fit inside the cover. Reduction of the pump body diameter is not realistic because of how the top plate is secured
To overcome a similar problem with the sizing of the oil pump cover I used a Cooper S oil pump which has a reduced upper body dia but which has a very good delivery flow, the centre boss and the bolt pillars were reduced in height and one of the bolts was replaced with a countersunk screw. The pump cover was made slightly convex to clear the pump centre boss.
You can usually mix and match the pump drive shafts but the shaft to use is one with a key as there is a tendency for the rotor to spin on the drive shaft if there is no key and the oil is thick/cold.
See link to Calver:-
https://www.calverst.com/technical-info ... oil-pumps/
The modified Cooper S oil pump shown below has the pin drive keyed rotor/shaft fitted as it was last used with a 649 camshaft in a 1275cc block.
Phil
Just tried again and it comes up as disabled private message receipt
Anyway back to your question.
I have just tried the latest type spider/star drive and slot drive 1275cc oil pumps into the small block oil pump cover and they do not fit. The body of the oil pump is too large a diameter to fit inside the cover. Reduction of the pump body diameter is not realistic because of how the top plate is secured
To overcome a similar problem with the sizing of the oil pump cover I used a Cooper S oil pump which has a reduced upper body dia but which has a very good delivery flow, the centre boss and the bolt pillars were reduced in height and one of the bolts was replaced with a countersunk screw. The pump cover was made slightly convex to clear the pump centre boss.
You can usually mix and match the pump drive shafts but the shaft to use is one with a key as there is a tendency for the rotor to spin on the drive shaft if there is no key and the oil is thick/cold.
See link to Calver:-
https://www.calverst.com/technical-info ... oil-pumps/
The modified Cooper S oil pump shown below has the pin drive keyed rotor/shaft fitted as it was last used with a 649 camshaft in a 1275cc block.
- 100_2021.JPG (235.42 KiB) Viewed 725 times
- 100_2020.JPG (261.01 KiB) Viewed 725 times
Re: Oil pump cover
Posted: Wed May 02, 2018 7:29 pm
Thanks for all that useful info Phil, the link is interesting, I've kept it for reference.
Going to have to look into this PM business.
Going to have to look into this PM business.
Re: Oil pump cover
Posted: Wed May 02, 2018 9:47 pm
PM facility should be ok now. Not sure how this option got disabled recently. I'm glad you highlighted the problem Phil !
Re: Oil pump cover
Posted: Wed May 02, 2018 10:24 pm
Les
You appear to be back and available on PM and confirmed by a short test reply to your PM question.
Phil
You appear to be back and available on PM and confirmed by a short test reply to your PM question.
Phil
Re: Oil pump cover
Posted: Thu May 03, 2018 11:44 am
Yep up and running again!