• Hi Guest!
    If you appreciate British Car Forum and our 25 years of supporting British car enthusiasts with technical and anicdotal information, collected from our thousands of great members, please support us with a low-cost subscription. You can become a supporting member for less than the dues of most car clubs.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

TR2/3/3A Worn valve rocker shaft.....

Share this page

Likely very little short term . Long term ,unusual wear will be likely on the valve stems and guides.
The major issue is getting valve lash set up correctly. A fresh shaft is cheap but take a picture
or two as you disassemble it and dont be shocked if some of the rockers are shot.
IMHO refresh all the rockers to 1.55 to 1 This will pick up 2 or 3 HP.
Mad dog
 
Thanks for the info on the rocker shaft. (Have you had a chance to ship out the TR3 horn turn signal button we talked about? I can pay in advance for freight if you like?) Karl
 
Assuming you set your valve clearance regularly, wear will only have the affect of slightly reduced oil to the front rockers on the shaft. Since it's already worn...the reduced oil may speed further shaft wear slightly.

I have noted that the steel rocker shaft wears much faster than the bronze rocker bushings. I have never figured that one out?!? Also, if you think about it, as the rockers rise with shaft wear, the valves will also be slowly rising with gradual valve seat wear. So...in the end they will keep the designed tappet to valve geometry. I really don't think rocker shaft wear will hurt anything, so long as you adjust the valve clearance to keep up with the wear.
 
Back
Top