• 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.)
  • When posting a classified ad, you MUST select a prefix from the drop-down next to the subject line. If you don't you will get an error and your ad will not be posted!
Tips
Tips

How rear scroll seals fail

Gerard

Luke Skywalker
Country flag
Offline
Since the topic of rear seal leaks come up so frequently, I thought it'd post some pix showing why a line bore, including the half moon piece and matching section of the main, is required when rebuilding an engine, and why correct venting is not always a fix. Factory tolerance for the air gap is .0015 to .004. Since this part is often not removed or inspected during a rebuild, the problem will still exist.

It was pretty easy to come up with these samples, as pretty much every one I looked at had some sort of similar damage.

The front transmission cover has a similar design and should be inspected for wear in the opening of the cover, as well as the input shaft

. ScrollSeal0001.jpgScrollSeal0003.jpgScrollSeal0005.jpgWP_001150.jpgWP_001152.jpgWP_001153-e.jpg
 
Back
Top