• 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 TR3 / TR4 head crack repair

Share this page

A

Adrio

Jedi Knight
Country flag
Offline
I have a TR4 head that is cracked slightly between the valves in one spot. I was wondering if anyone has ever had this repaired and if it worked out. If so haw was it done.

This is a 'spare' head for me but it turns out the head I have in my TR3 is a TR2 head and the ports on the TR2 head are lower and smaller (I think I have that the right way around). I figure the next time I tear into the engine I will want to get the correct head on there, so I may as well get it fixed now.

Any comments from the collective wisdome of the group?
 
If the crack is not too deep you can fit seat rings.
 
And a lot of competent hot rod machine shops that do welding can weld this, if the seats can't fix it. May take a little digging around to find someone, but it is less expensive than buying a new head.
 
I would say if the crack is deep it will be dificult to repair, if any part of the crack is left after the repair it is a stress riser and will just propogate back into the repaired area, the experts should tell you this
 
Back
Top