• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

T-Series Mgtd oil pump alterations

Share this page

A

Arkansas MG

Freshman Member
Country flag
Offline
Realizing these engines are almost 70 years old, and they have been in the hands of several people. After removing the oil pump to clear the engine so cam could be removed, i noticed the oil pressure bypass valve (the one used to circumvent the oil filter if it should become clogged) was missing. In its place was a metal tube (see picture). If i understand the mechanics of this alteration the oil would flow past the oil filter at all times. I have removed the tube and inserted the valve assembly (spring, ball and guide) as it should be. The question i have is,.....why in the world would someone make this alteration, is there some advantage to having done so.
 

Attachments

  • MVC-010S.JPG
    MVC-010S.JPG
    56.2 KB · Views: 141
  • 20201027_120246 (480x640).jpg
    20201027_120246 (480x640).jpg
    145.7 KB · Views: 132
  • MGTDGARAGE.jpg
    MGTDGARAGE.jpg
    83.2 KB · Views: 134
Last edited:
That is as I have found out as well. This however is not the valve (spring and ball) that controls the engine oil pressure, but rather the valve in the block behind the oil pump (similar design) that controls the bypass to the oil filter if the filter should become clogged. It allows for oil to continue to flow to the engine even though it is not screened through the filter. Some past owner removed the bypass valve in the block and replaced with the metal pipe in the picture. I suspect this alteration allowed for the oil to flow back to the engine all the time without going through the filter. I have since removed the pipe and installed the ball, spring and guide. What perplexes me is why would the pipe be put in. Was there a purpose? I have never seen before. Thanks for any input.
 
Back
Top