Tappet cover gasket

Discuss mechanical problems here.
Forum rules
By using this site, you agree to our rules. Please see: Terms of Use
Post Reply
Nax
Minor Friendly
Posts: 42
Joined: Fri Apr 03, 2026 4:59 pm
Location: UK
MMOC Member: No

Tappet cover gasket

Post by Nax »

1971 1098 engine

Can someone tell me the correct gasket for a concave type tappet side cover with a breather and oil catch pipe?
I need to clean out the breather.
Also does it require a rubber washer?
User avatar
svenedin
Minor Legend
Posts: 4741
Joined: Fri Aug 29, 2014 9:27 am
Location: Surrey
MMOC Member: Yes

Re: Tappet cover gasket

Post by svenedin »

For the concave tappet chest cover: Neoprene gasket is the correct type. For the machine screw that holds the cover on it is just a fibre washer, 5/16" that is used under the head of the screw.

The length of the machine screw is different for the convex and concave types of cover. The convex type uses a longer screw and also a metal cup washer and rubber washer under the cup washer. The cup washer and rubber washer can also be used with the concave cover, if wanted, but the machine screw needs to be long enough to accommodate this. Concave cover 5/16" UNF x 1 1/8" Convex 5/16" UNF x 1 7/8"

https://www.morrisminorspares.com/engin ... 58-p830400

https://www.morrisminorspares.com/engin ... ll-p830243

Stephen
1969 1098cc Convertible “Xavier” which I have owned since 1989.

Stephen
les
Minor Maniac
Posts: 9693
Joined: Tue Feb 12, 2002 12:00 am
Location: kent
MMOC Member: Yes

Re: Tappet cover gasket

Post by les »

It may vary but my covers are held in place with a bolt and rubber seals held in the washers shown
IMG_4053.jpeg
IMG_4053.jpeg (69.55 KiB) Viewed 2575 times

Nax
Minor Friendly
Posts: 42
Joined: Fri Apr 03, 2026 4:59 pm
Location: UK
MMOC Member: No

Re: Tappet cover gasket

Post by Nax »

Perfect I will get that ordered from ESM
Thanks
Post Reply