Moliver Posted January 1, 2021 Report Share Posted January 1, 2021 Hi there, I do have a TR2 but with a TR 4 A engine fitted. Is there any difference in valve clearance between the TR 2 and 4A head? Input appreciated. Cheers Oliver Quote Link to post Share on other sites
BRENDA1 Posted January 1, 2021 Report Share Posted January 1, 2021 Standard TR4a tappets 10 thou set cold. Mike Redrose Group Quote Link to post Share on other sites
BlueTR3A-5EKT Posted January 2, 2021 Report Share Posted January 2, 2021 Which rocker pedestals do you have? if aluminium pedestals are fitted, the above dimension is correct for standard profile camshafts. if steel pedestals are fitted, as original to TR2, then use 0.010” inlet and 0.012” exhaust. Again with all standard profile camshafts TR 2 to 4A. 0.013” is suggested for both inlet and exhaust if you are doing competition driving in the car. Read this if interested in further knowledge. https://www.macysgarage.com/valve-adj.htm Cheers Peter W Quote Link to post Share on other sites
peejay4A Posted January 2, 2021 Report Share Posted January 2, 2021 I use the Macy method every time. It works and I’ve proved it (to myself) to be more reliable in terms of accuracy and repeatability than the rule of 9. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted January 4, 2021 Report Share Posted January 4, 2021 Slight thread drift Original TR2 steel rocker pedestals crack - here is an image of the internal cracking. All 4 were similarly cracked on this engine. Peter W Quote Link to post Share on other sites
Lebro Posted January 4, 2021 Report Share Posted January 4, 2021 Not nice & quite surprising. Could this engine have had a wild cam in it, or perhaps extra strong valve springs ? Bob. Quote Link to post Share on other sites
BlueTR3A-5EKT Posted January 4, 2021 Report Share Posted January 4, 2021 26 minutes ago, Lebro said: Not nice & quite surprising. Could this engine have had a wild cam in it, or perhaps extra strong valve springs ? Bob. Bog standard TR2. I rebuilt it in 1974 using all standard items. Peter W Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.