• 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

TR4/4A Need TR4A Camshaft Bearing Setscrew Help

Share this page

Stinger

Stinger

Jedi Hopeful
Country flag
Offline
Tried to start my TR4A for the first time and while watching the fuel pump bowl I noticed oil dripping just behind the coil. Looks like one of the camshaft bearing setscrews was missing! Luckily I caught this before she started but cant seem to find a replacement screw in the vendors catalogs. Anyone have a spare I could purchase? Thanks JD
IMG_2159.jpg
[/img]
 
TRF has them listed, P/N 110462. $5 each!

Had the same problem many years ago, and just replaced it with a shorter bolt of the right thread. Never had any trouble with the insert moving.
 
... but caution is advised as too long a bolt will deform the camshaft bearing.
 
I ordered the correct bolt and had a question. I looked in the hole the bolt came out of and I can see the bearing oil groove. This was visible in the missing bolt hole and also the one I removed. Is the cam bearing suppose to be oriented in a certain way with a hole for the bolt to match up with or does the bolt just catch the edge of the oil groove or ??? Thanks
 
There is a specific hole in the bearing that is supposed to match up with the setscrew. But ISTR it's a slot on some bearing sets, so likely that is what you are looking at. An "oil groove" would only be in the face of the bearing and so not visible through the hole.

Mine didn't have any grooves at all, except the slot where the locating setscrew went.
 
I'll have to check my shop manual, but off-hand I think that they are supposed to match up with a hole in the bearing to prevent the bearing from spinning. Being that the bearings are pressed in and not prone to spin, I would think that either way would be OK.

Also the thickness of the washer is important - if they are too thin the bolt can deform the bearing when they are torqued.
 
Back
Top